/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_palindrome_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:47:02,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:47:02,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:47:02,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:47:02,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:47:02,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:47:02,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:47:02,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:47:02,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:47:02,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:47:02,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:47:02,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:47:02,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:47:02,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:47:02,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:47:02,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:47:02,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:47:02,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:47:02,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:47:02,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:47:02,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:47:02,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:47:02,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:47:02,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:47:02,193 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:47:02,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:47:02,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:47:02,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:47:02,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:47:02,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:47:02,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:47:02,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:47:02,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:47:02,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:47:02,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:47:02,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:47:02,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:47:02,196 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:47:02,196 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:47:02,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:47:02,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:47:02,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:47:02,377 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:47:02,377 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:47:02,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_palindrome_ground.i [2022-01-31 17:47:02,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047f8a743/7370025bd6e8401aa02ee712d17c3b1e/FLAG7f9bc5ee3 [2022-01-31 17:47:02,788 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:47:02,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_palindrome_ground.i [2022-01-31 17:47:02,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047f8a743/7370025bd6e8401aa02ee712d17c3b1e/FLAG7f9bc5ee3 [2022-01-31 17:47:02,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047f8a743/7370025bd6e8401aa02ee712d17c3b1e [2022-01-31 17:47:02,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:47:02,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:47:02,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:47:02,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:47:02,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:47:02,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61cfac95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02, skipping insertion in model container [2022-01-31 17:47:02,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:47:02,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:47:02,921 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_palindrome_ground.i[819,832] [2022-01-31 17:47:02,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:47:02,932 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:47:02,946 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_palindrome_ground.i[819,832] [2022-01-31 17:47:02,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:47:02,969 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:47:02,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02 WrapperNode [2022-01-31 17:47:02,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:47:02,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:47:02,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:47:02,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:47:02,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:47:02,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:47:02,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:47:02,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:47:02,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (1/1) ... [2022-01-31 17:47:02,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:47:03,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:47:03,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:47:03,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:47:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:47:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:47:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:47:03,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:47:03,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:47:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:47:03,044 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:47:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:47:03,045 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:47:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:47:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:47:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:47:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:47:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:47:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:47:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:47:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:47:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:47:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:47:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:47:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:47:03,107 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:47:03,108 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:47:03,234 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:47:03,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:47:03,238 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 17:47:03,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:47:03 BoogieIcfgContainer [2022-01-31 17:47:03,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:47:03,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:47:03,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:47:03,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:47:03,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:47:02" (1/3) ... [2022-01-31 17:47:03,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df1dd62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:47:03, skipping insertion in model container [2022-01-31 17:47:03,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:47:02" (2/3) ... [2022-01-31 17:47:03,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df1dd62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:47:03, skipping insertion in model container [2022-01-31 17:47:03,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:47:03" (3/3) ... [2022-01-31 17:47:03,244 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2022-01-31 17:47:03,247 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:47:03,247 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:47:03,273 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:47:03,277 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:47:03,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:47:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:47:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:47:03,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:03,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:03,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1013160769, now seen corresponding path program 1 times [2022-01-31 17:47:03,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:03,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20842782] [2022-01-31 17:47:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:03,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:03,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20842782] [2022-01-31 17:47:03,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [20842782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:47:03,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214118298] [2022-01-31 17:47:03,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:47:03,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:47:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:47:03,433 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:03,457 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-01-31 17:47:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:47:03,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:47:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:03,464 INFO L225 Difference]: With dead ends: 46 [2022-01-31 17:47:03,465 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 17:47:03,468 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 [2022-01-31 17:47:03,476 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 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 [2022-01-31 17:47:03,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:47:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 17:47:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 17:47:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 17:47:03,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-01-31 17:47:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:03,513 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 17:47:03,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 17:47:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 17:47:03,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:03,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:03,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:47:03,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 211576627, now seen corresponding path program 1 times [2022-01-31 17:47:03,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:03,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017409568] [2022-01-31 17:47:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:03,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:03,525 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,583 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017409568] [2022-01-31 17:47:03,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017409568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:47:03,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541811722] [2022-01-31 17:47:03,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:47:03,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:47:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:47:03,586 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:03,642 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-31 17:47:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:47:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 17:47:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:03,644 INFO L225 Difference]: With dead ends: 40 [2022-01-31 17:47:03,644 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 17:47:03,647 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 [2022-01-31 17:47:03,649 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:03,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:47:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 17:47:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-01-31 17:47:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 17:47:03,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-31 17:47:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:03,662 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 17:47:03,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 17:47:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:47:03,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:03,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:03,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:47:03,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash 775264175, now seen corresponding path program 1 times [2022-01-31 17:47:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521492446] [2022-01-31 17:47:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:03,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:03,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:03,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:03,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521492446] [2022-01-31 17:47:03,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [521492446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:47:03,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435898954] [2022-01-31 17:47:03,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:47:03,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:47:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:47:03,778 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:03,852 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-01-31 17:47:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:47:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:47:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:03,854 INFO L225 Difference]: With dead ends: 45 [2022-01-31 17:47:03,854 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 17:47:03,854 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 [2022-01-31 17:47:03,859 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:03,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:47:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 17:47:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 17:47:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-01-31 17:47:03,872 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-01-31 17:47:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:03,872 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-01-31 17:47:03,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-01-31 17:47:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 17:47:03,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:03,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:03,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:47:03,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1735189973, now seen corresponding path program 2 times [2022-01-31 17:47:03,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076453537] [2022-01-31 17:47:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:03,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:03,880 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:03,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:03,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:03,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076453537] [2022-01-31 17:47:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076453537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:03,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:47:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393121778] [2022-01-31 17:47:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:03,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:47:03,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:47:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:47:03,957 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,031 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-01-31 17:47:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:47:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 17:47:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,034 INFO L225 Difference]: With dead ends: 51 [2022-01-31 17:47:04,034 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:47:04,034 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 [2022-01-31 17:47:04,038 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 26 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:47:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:47:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 17:47:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-31 17:47:04,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2022-01-31 17:47:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,047 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-31 17:47:04,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-31 17:47:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:47:04,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:47:04,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1858072231, now seen corresponding path program 3 times [2022-01-31 17:47:04,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545115376] [2022-01-31 17:47:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:04,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545115376] [2022-01-31 17:47:04,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545115376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:47:04,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515524199] [2022-01-31 17:47:04,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:47:04,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:47:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:47:04,107 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,188 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-01-31 17:47:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:47:04,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:47:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,189 INFO L225 Difference]: With dead ends: 57 [2022-01-31 17:47:04,189 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 17:47:04,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:47:04,190 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:47:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 17:47:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-31 17:47:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-01-31 17:47:04,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2022-01-31 17:47:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,194 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-01-31 17:47:04,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-01-31 17:47:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 17:47:04,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:47:04,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,195 INFO L85 PathProgramCache]: Analyzing trace with hash 88544547, now seen corresponding path program 4 times [2022-01-31 17:47:04,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24304904] [2022-01-31 17:47:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:04,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24304904] [2022-01-31 17:47:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [24304904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:47:04,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4549989] [2022-01-31 17:47:04,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:47:04,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:47:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:47:04,249 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,372 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-01-31 17:47:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:47:04,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 17:47:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,373 INFO L225 Difference]: With dead ends: 63 [2022-01-31 17:47:04,373 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 17:47:04,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:47:04,375 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 17:47:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-31 17:47:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-31 17:47:04,382 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2022-01-31 17:47:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,383 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-31 17:47:04,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-31 17:47:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:47:04,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,383 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:47:04,384 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1647545759, now seen corresponding path program 5 times [2022-01-31 17:47:04,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124381572] [2022-01-31 17:47:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,387 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,388 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:04,459 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124381572] [2022-01-31 17:47:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [124381572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:47:04,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796908909] [2022-01-31 17:47:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:47:04,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:47:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:47:04,461 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,594 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-01-31 17:47:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:47:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:47:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,596 INFO L225 Difference]: With dead ends: 69 [2022-01-31 17:47:04,596 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 17:47:04,597 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 [2022-01-31 17:47:04,598 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 36 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 17:47:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-01-31 17:47:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-01-31 17:47:04,604 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2022-01-31 17:47:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,604 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-01-31 17:47:04,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-01-31 17:47:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 17:47:04,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,605 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:47:04,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1123002341, now seen corresponding path program 6 times [2022-01-31 17:47:04,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623977978] [2022-01-31 17:47:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,608 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:04,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623977978] [2022-01-31 17:47:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623977978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:47:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728826237] [2022-01-31 17:47:04,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:47:04,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:47:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:47:04,681 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,796 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-01-31 17:47:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:47:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 17:47:04,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,797 INFO L225 Difference]: With dead ends: 75 [2022-01-31 17:47:04,797 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 17:47:04,797 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 [2022-01-31 17:47:04,797 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 36 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 17:47:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-01-31 17:47:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-31 17:47:04,803 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2022-01-31 17:47:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:04,803 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-31 17:47:04,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-31 17:47:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:47:04,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:04,804 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:04,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:47:04,804 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -18320233, now seen corresponding path program 7 times [2022-01-31 17:47:04,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139431091] [2022-01-31 17:47:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:04,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:04,806 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:04,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:04,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:04,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139431091] [2022-01-31 17:47:04,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [139431091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:47:04,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969048640] [2022-01-31 17:47:04,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:47:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:47:04,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:47:04,875 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:04,997 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-01-31 17:47:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:47:04,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:47:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:04,998 INFO L225 Difference]: With dead ends: 81 [2022-01-31 17:47:04,998 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 17:47:04,998 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 [2022-01-31 17:47:04,999 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:04,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 17:47:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-01-31 17:47:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-01-31 17:47:05,004 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2022-01-31 17:47:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-01-31 17:47:05,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-01-31 17:47:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:47:05,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:05,005 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:05,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:47:05,005 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1111941907, now seen corresponding path program 8 times [2022-01-31 17:47:05,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:05,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040908613] [2022-01-31 17:47:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:05,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:05,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:05,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:05,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:05,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040908613] [2022-01-31 17:47:05,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040908613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:05,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:05,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:47:05,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586341147] [2022-01-31 17:47:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:05,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:47:05,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:47:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:47:05,084 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:05,217 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2022-01-31 17:47:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:47:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 17:47:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:05,218 INFO L225 Difference]: With dead ends: 87 [2022-01-31 17:47:05,218 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 17:47:05,219 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 [2022-01-31 17:47:05,219 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:05,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 51 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 17:47:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-01-31 17:47:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-01-31 17:47:05,231 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 47 [2022-01-31 17:47:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:05,231 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-01-31 17:47:05,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-01-31 17:47:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:47:05,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:05,233 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:05,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:47:05,233 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:05,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1396089743, now seen corresponding path program 9 times [2022-01-31 17:47:05,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:05,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765632858] [2022-01-31 17:47:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:05,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:05,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:05,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:05,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:05,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765632858] [2022-01-31 17:47:05,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765632858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:05,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:05,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:47:05,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600387530] [2022-01-31 17:47:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:05,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:47:05,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:47:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:47:05,328 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:05,473 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-01-31 17:47:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:47:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:47:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:05,474 INFO L225 Difference]: With dead ends: 93 [2022-01-31 17:47:05,474 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:47:05,475 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 [2022-01-31 17:47:05,475 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:05,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 26 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:47:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-01-31 17:47:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 17:47:05,486 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2022-01-31 17:47:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:05,487 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 17:47:05,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 17:47:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:47:05,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:05,490 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:05,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:47:05,490 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash 792901131, now seen corresponding path program 10 times [2022-01-31 17:47:05,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:05,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257344582] [2022-01-31 17:47:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:05,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:05,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:05,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:05,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:05,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:05,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257344582] [2022-01-31 17:47:05,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257344582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:05,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:05,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:47:05,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266050191] [2022-01-31 17:47:05,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:05,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:47:05,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:05,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:47:05,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:47:05,619 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:05,790 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-01-31 17:47:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:47:05,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 17:47:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:05,791 INFO L225 Difference]: With dead ends: 99 [2022-01-31 17:47:05,791 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 17:47:05,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:47:05,792 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:05,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 17:47:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-01-31 17:47:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-01-31 17:47:05,798 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2022-01-31 17:47:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:05,798 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-01-31 17:47:05,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-01-31 17:47:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:47:05,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:05,799 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:05,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:47:05,799 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2055857529, now seen corresponding path program 11 times [2022-01-31 17:47:05,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:05,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874064912] [2022-01-31 17:47:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:05,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:05,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:05,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:05,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:05,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:05,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874064912] [2022-01-31 17:47:05,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874064912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:05,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:05,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:47:05,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965232657] [2022-01-31 17:47:05,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:05,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:47:05,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:47:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:47:05,953 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:06,145 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-01-31 17:47:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:47:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:47:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:06,146 INFO L225 Difference]: With dead ends: 105 [2022-01-31 17:47:06,146 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 17:47:06,146 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 [2022-01-31 17:47:06,147 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:06,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 26 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 17:47:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-01-31 17:47:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-01-31 17:47:06,152 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2022-01-31 17:47:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:06,152 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-01-31 17:47:06,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,152 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-01-31 17:47:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:47:06,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:06,153 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:06,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:47:06,153 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash 911986947, now seen corresponding path program 12 times [2022-01-31 17:47:06,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:06,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047617344] [2022-01-31 17:47:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:06,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:06,155 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:06,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:06,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:06,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:06,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047617344] [2022-01-31 17:47:06,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2047617344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:06,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:06,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:47:06,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398058498] [2022-01-31 17:47:06,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:06,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:47:06,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:47:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:47:06,275 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:06,495 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-01-31 17:47:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:47:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 17:47:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:06,496 INFO L225 Difference]: With dead ends: 111 [2022-01-31 17:47:06,496 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 17:47:06,497 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 [2022-01-31 17:47:06,497 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:06,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 31 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 17:47:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-01-31 17:47:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-01-31 17:47:06,502 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2022-01-31 17:47:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:06,503 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-01-31 17:47:06,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-01-31 17:47:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:47:06,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:06,503 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:06,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:47:06,503 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash -738272897, now seen corresponding path program 13 times [2022-01-31 17:47:06,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:06,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823089295] [2022-01-31 17:47:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:06,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:06,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:06,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:06,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:06,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823089295] [2022-01-31 17:47:06,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [823089295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:06,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:06,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:47:06,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384582195] [2022-01-31 17:47:06,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:06,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:47:06,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:06,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:47:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:47:06,618 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:06,855 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-01-31 17:47:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:47:06,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 17:47:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:06,855 INFO L225 Difference]: With dead ends: 117 [2022-01-31 17:47:06,855 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 17:47:06,856 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 [2022-01-31 17:47:06,856 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:06,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 31 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 17:47:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-01-31 17:47:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 17:47:06,862 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2022-01-31 17:47:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:06,862 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 17:47:06,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 17:47:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:47:06,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:06,863 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:06,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:47:06,863 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash 568996859, now seen corresponding path program 14 times [2022-01-31 17:47:06,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:06,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531837891] [2022-01-31 17:47:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:06,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:06,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:06,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:06,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:06,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:07,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531837891] [2022-01-31 17:47:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531837891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:07,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:07,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:47:07,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242426232] [2022-01-31 17:47:07,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:07,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:47:07,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:47:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:47:07,006 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:07,267 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-01-31 17:47:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:47:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 17:47:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:07,268 INFO L225 Difference]: With dead ends: 123 [2022-01-31 17:47:07,268 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 17:47:07,268 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 [2022-01-31 17:47:07,269 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:07,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 41 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 17:47:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-01-31 17:47:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-01-31 17:47:07,276 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 71 [2022-01-31 17:47:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:07,276 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-01-31 17:47:07,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-01-31 17:47:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:47:07,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:07,277 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:07,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:47:07,277 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:07,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1792483209, now seen corresponding path program 15 times [2022-01-31 17:47:07,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:07,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075169885] [2022-01-31 17:47:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:07,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:07,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:07,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:07,280 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:07,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:07,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075169885] [2022-01-31 17:47:07,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075169885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:07,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:07,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:47:07,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362600720] [2022-01-31 17:47:07,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:07,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:47:07,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:47:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:47:07,438 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:07,701 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2022-01-31 17:47:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:47:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:47:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:07,701 INFO L225 Difference]: With dead ends: 129 [2022-01-31 17:47:07,701 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 17:47:07,702 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 [2022-01-31 17:47:07,702 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:07,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 46 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 17:47:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-01-31 17:47:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-01-31 17:47:07,709 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 75 [2022-01-31 17:47:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:07,709 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-01-31 17:47:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-01-31 17:47:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:47:07,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:07,713 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:07,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:47:07,713 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash -733618445, now seen corresponding path program 16 times [2022-01-31 17:47:07,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002089910] [2022-01-31 17:47:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:07,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:07,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:07,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:07,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:07,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:07,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002089910] [2022-01-31 17:47:07,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002089910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:07,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:07,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:47:07,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729636466] [2022-01-31 17:47:07,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:07,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:47:07,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:07,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:47:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:47:07,896 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:08,197 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2022-01-31 17:47:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:47:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 17:47:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:08,198 INFO L225 Difference]: With dead ends: 135 [2022-01-31 17:47:08,198 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:47:08,199 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 [2022-01-31 17:47:08,199 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:08,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 36 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:47:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-01-31 17:47:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-01-31 17:47:08,206 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 79 [2022-01-31 17:47:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:08,206 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-01-31 17:47:08,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-01-31 17:47:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:47:08,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:08,207 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:08,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:47:08,207 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 927739759, now seen corresponding path program 17 times [2022-01-31 17:47:08,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:08,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884848734] [2022-01-31 17:47:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:08,209 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:08,209 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:08,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:08,210 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:08,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:08,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:08,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884848734] [2022-01-31 17:47:08,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884848734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:08,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:08,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:47:08,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804531532] [2022-01-31 17:47:08,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:08,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:47:08,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:08,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:47:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:47:08,373 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:08,659 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-01-31 17:47:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:47:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:47:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:08,660 INFO L225 Difference]: With dead ends: 141 [2022-01-31 17:47:08,660 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 17:47:08,660 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 [2022-01-31 17:47:08,661 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:08,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 41 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 17:47:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-01-31 17:47:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-01-31 17:47:08,669 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 83 [2022-01-31 17:47:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:08,669 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-01-31 17:47:08,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-01-31 17:47:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:47:08,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:08,669 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:08,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:47:08,670 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1204212203, now seen corresponding path program 18 times [2022-01-31 17:47:08,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:08,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100163837] [2022-01-31 17:47:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:08,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:08,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:08,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:08,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:08,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:08,887 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:08,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100163837] [2022-01-31 17:47:08,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [100163837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:08,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:08,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:47:08,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788549761] [2022-01-31 17:47:08,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:08,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:47:08,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:47:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:47:08,888 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:09,240 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2022-01-31 17:47:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:47:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 17:47:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:09,241 INFO L225 Difference]: With dead ends: 147 [2022-01-31 17:47:09,241 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 17:47:09,242 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 [2022-01-31 17:47:09,243 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:09,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 46 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 17:47:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-01-31 17:47:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-01-31 17:47:09,251 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2022-01-31 17:47:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:09,252 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-01-31 17:47:09,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-01-31 17:47:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:47:09,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:09,252 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:09,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:47:09,252 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1086375527, now seen corresponding path program 19 times [2022-01-31 17:47:09,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:09,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843005622] [2022-01-31 17:47:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:09,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:09,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:09,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:09,255 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:09,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843005622] [2022-01-31 17:47:09,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [843005622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:09,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:09,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:47:09,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362055721] [2022-01-31 17:47:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:09,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:47:09,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:47:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:47:09,455 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:09,781 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-01-31 17:47:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:47:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:47:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:09,782 INFO L225 Difference]: With dead ends: 153 [2022-01-31 17:47:09,782 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 17:47:09,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:47:09,783 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:09,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 17:47:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-01-31 17:47:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-01-31 17:47:09,792 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 91 [2022-01-31 17:47:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-01-31 17:47:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-01-31 17:47:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:47:09,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:09,792 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:09,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:47:09,793 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1899688733, now seen corresponding path program 20 times [2022-01-31 17:47:09,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:09,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581342787] [2022-01-31 17:47:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:09,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:09,794 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:09,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:09,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:09,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581342787] [2022-01-31 17:47:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581342787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:47:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954266858] [2022-01-31 17:47:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:47:09,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:47:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:47:09,998 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:10,363 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-01-31 17:47:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:47:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 17:47:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:10,365 INFO L225 Difference]: With dead ends: 159 [2022-01-31 17:47:10,365 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 17:47:10,366 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 [2022-01-31 17:47:10,367 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:10,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 36 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 17:47:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-01-31 17:47:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-01-31 17:47:10,376 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 95 [2022-01-31 17:47:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:10,376 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-01-31 17:47:10,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-01-31 17:47:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:47:10,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:10,376 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:10,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:47:10,377 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1339991391, now seen corresponding path program 21 times [2022-01-31 17:47:10,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872308191] [2022-01-31 17:47:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:10,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:10,379 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:10,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:10,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:10,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872308191] [2022-01-31 17:47:10,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872308191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:10,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:10,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:47:10,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294011709] [2022-01-31 17:47:10,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:10,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:47:10,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:47:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:47:10,604 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:10,989 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-01-31 17:47:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:47:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:47:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:10,991 INFO L225 Difference]: With dead ends: 165 [2022-01-31 17:47:10,991 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 17:47:10,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:47:10,994 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:10,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 46 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:10,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 17:47:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-01-31 17:47:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-01-31 17:47:11,008 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 99 [2022-01-31 17:47:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:11,008 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-01-31 17:47:11,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-01-31 17:47:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:47:11,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:11,009 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:11,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:47:11,009 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash -744976421, now seen corresponding path program 22 times [2022-01-31 17:47:11,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:11,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333108908] [2022-01-31 17:47:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:11,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:11,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:11,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:11,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:11,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:11,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333108908] [2022-01-31 17:47:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [333108908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:11,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:11,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:47:11,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380361479] [2022-01-31 17:47:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:11,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:47:11,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:47:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:47:11,247 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:11,645 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2022-01-31 17:47:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:47:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 17:47:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:11,646 INFO L225 Difference]: With dead ends: 171 [2022-01-31 17:47:11,646 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 17:47:11,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:47:11,647 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:11,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 46 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 17:47:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-01-31 17:47:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-01-31 17:47:11,657 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 103 [2022-01-31 17:47:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:11,657 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-01-31 17:47:11,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-01-31 17:47:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:47:11,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:11,658 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:11,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:47:11,658 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 452840535, now seen corresponding path program 23 times [2022-01-31 17:47:11,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:11,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590282177] [2022-01-31 17:47:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:11,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:11,661 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:11,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:11,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:11,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:11,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590282177] [2022-01-31 17:47:11,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [590282177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:11,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:11,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:47:11,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042819822] [2022-01-31 17:47:11,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:11,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:47:11,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:11,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:47:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:47:11,913 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:12,368 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2022-01-31 17:47:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:47:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:47:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:12,369 INFO L225 Difference]: With dead ends: 177 [2022-01-31 17:47:12,369 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:47:12,370 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 [2022-01-31 17:47:12,370 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 157 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 36 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:47:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-01-31 17:47:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-01-31 17:47:12,386 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 107 [2022-01-31 17:47:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:12,386 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-01-31 17:47:12,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-01-31 17:47:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:47:12,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:12,388 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:12,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:47:12,388 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:12,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1486445267, now seen corresponding path program 24 times [2022-01-31 17:47:12,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014323706] [2022-01-31 17:47:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:12,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:12,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:12,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:12,392 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:12,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:12,710 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014323706] [2022-01-31 17:47:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014323706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:12,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:12,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:47:12,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483356985] [2022-01-31 17:47:12,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:12,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:47:12,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:47:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:47:12,712 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:13,182 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2022-01-31 17:47:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:47:13,183 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 17:47:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:13,183 INFO L225 Difference]: With dead ends: 183 [2022-01-31 17:47:13,183 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 17:47:13,184 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 [2022-01-31 17:47:13,184 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:13,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 31 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 17:47:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-01-31 17:47:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-01-31 17:47:13,195 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 111 [2022-01-31 17:47:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:13,195 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-01-31 17:47:13,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-01-31 17:47:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:47:13,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:13,196 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:13,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:47:13,196 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1886796623, now seen corresponding path program 25 times [2022-01-31 17:47:13,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392615268] [2022-01-31 17:47:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:13,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:13,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:13,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:13,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:13,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:13,468 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392615268] [2022-01-31 17:47:13,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [392615268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:13,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:47:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880711931] [2022-01-31 17:47:13,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:13,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:47:13,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:13,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:47:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:47:13,470 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:13,941 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2022-01-31 17:47:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:47:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:47:13,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:13,942 INFO L225 Difference]: With dead ends: 189 [2022-01-31 17:47:13,942 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 17:47:13,943 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 [2022-01-31 17:47:13,943 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:13,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 26 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 17:47:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2022-01-31 17:47:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-01-31 17:47:13,959 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 115 [2022-01-31 17:47:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:13,959 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-01-31 17:47:13,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-01-31 17:47:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:47:13,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:13,960 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:13,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:47:13,960 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2015325643, now seen corresponding path program 26 times [2022-01-31 17:47:13,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:13,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219599738] [2022-01-31 17:47:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:13,962 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:13,962 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:13,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:13,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:14,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:14,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219599738] [2022-01-31 17:47:14,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219599738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:14,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:14,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:47:14,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310485939] [2022-01-31 17:47:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:14,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:47:14,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:47:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:47:14,248 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:14,715 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2022-01-31 17:47:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:47:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 17:47:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:14,716 INFO L225 Difference]: With dead ends: 195 [2022-01-31 17:47:14,716 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 17:47:14,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:47:14,717 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:14,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 41 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 17:47:14,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-01-31 17:47:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-01-31 17:47:14,735 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 119 [2022-01-31 17:47:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:14,735 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-01-31 17:47:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-01-31 17:47:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:47:14,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:14,739 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:14,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:47:14,739 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash 916451911, now seen corresponding path program 27 times [2022-01-31 17:47:14,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429237368] [2022-01-31 17:47:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:14,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:14,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:14,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:14,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:15,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429237368] [2022-01-31 17:47:15,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [429237368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:15,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:15,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:47:15,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584975993] [2022-01-31 17:47:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:15,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:47:15,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:47:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:47:15,083 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:15,629 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2022-01-31 17:47:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:47:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:47:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:15,630 INFO L225 Difference]: With dead ends: 201 [2022-01-31 17:47:15,630 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 17:47:15,631 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 [2022-01-31 17:47:15,631 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:15,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 56 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:47:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 17:47:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2022-01-31 17:47:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2022-01-31 17:47:15,644 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 123 [2022-01-31 17:47:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:15,644 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2022-01-31 17:47:15,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2022-01-31 17:47:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:47:15,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:15,645 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:15,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:47:15,645 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1534932797, now seen corresponding path program 28 times [2022-01-31 17:47:15,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:15,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796770026] [2022-01-31 17:47:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:15,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:15,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:15,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:15,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:15,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796770026] [2022-01-31 17:47:15,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796770026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:15,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:15,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:47:15,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35278443] [2022-01-31 17:47:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:15,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:47:15,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:47:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:47:15,981 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:16,605 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2022-01-31 17:47:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:47:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 17:47:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:16,605 INFO L225 Difference]: With dead ends: 207 [2022-01-31 17:47:16,605 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 17:47:16,607 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 [2022-01-31 17:47:16,607 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:16,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 46 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 17:47:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-01-31 17:47:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-01-31 17:47:16,635 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 127 [2022-01-31 17:47:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:16,635 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-01-31 17:47:16,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-01-31 17:47:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:47:16,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:16,636 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:16,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:47:16,636 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1808986431, now seen corresponding path program 29 times [2022-01-31 17:47:16,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932125820] [2022-01-31 17:47:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:16,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:16,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:16,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:16,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:16,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:16,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932125820] [2022-01-31 17:47:16,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [932125820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:16,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:16,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:47:16,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824860246] [2022-01-31 17:47:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:16,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:47:16,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:16,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:47:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:47:16,998 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:17,569 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2022-01-31 17:47:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:47:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:47:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:17,570 INFO L225 Difference]: With dead ends: 213 [2022-01-31 17:47:17,570 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 17:47:17,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:47:17,572 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 197 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:17,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 46 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 17:47:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-01-31 17:47:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2022-01-31 17:47:17,587 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 131 [2022-01-31 17:47:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:17,587 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2022-01-31 17:47:17,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2022-01-31 17:47:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:47:17,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:17,588 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:17,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:47:17,588 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1746627515, now seen corresponding path program 30 times [2022-01-31 17:47:17,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:17,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472612665] [2022-01-31 17:47:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:17,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:17,590 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:17,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:17,592 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:18,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:18,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472612665] [2022-01-31 17:47:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472612665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:18,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:18,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:47:18,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240019715] [2022-01-31 17:47:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:18,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:47:18,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:47:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:47:18,085 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:18,660 INFO L93 Difference]: Finished difference Result 219 states and 224 transitions. [2022-01-31 17:47:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:47:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 17:47:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:18,661 INFO L225 Difference]: With dead ends: 219 [2022-01-31 17:47:18,661 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:47:18,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:47:18,663 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 209 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:18,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 41 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:47:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-01-31 17:47:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2022-01-31 17:47:18,678 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 135 [2022-01-31 17:47:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:18,679 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2022-01-31 17:47:18,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2022-01-31 17:47:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:47:18,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:18,679 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:18,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:47:18,679 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash 644298807, now seen corresponding path program 31 times [2022-01-31 17:47:18,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:18,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556610750] [2022-01-31 17:47:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:18,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:18,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:18,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:18,683 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:19,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:19,081 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556610750] [2022-01-31 17:47:19,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [556610750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:19,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:19,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:47:19,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841327551] [2022-01-31 17:47:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:19,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:47:19,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:47:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:47:19,083 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:19,704 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2022-01-31 17:47:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:47:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:47:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:19,705 INFO L225 Difference]: With dead ends: 225 [2022-01-31 17:47:19,705 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 17:47:19,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:47:19,706 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 200 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:19,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 41 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 17:47:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-01-31 17:47:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-01-31 17:47:19,723 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 139 [2022-01-31 17:47:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:19,723 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-01-31 17:47:19,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-01-31 17:47:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:47:19,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:19,724 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:19,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:47:19,724 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:19,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1698780851, now seen corresponding path program 32 times [2022-01-31 17:47:19,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:19,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791635615] [2022-01-31 17:47:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:19,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:19,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:19,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:19,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:20,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791635615] [2022-01-31 17:47:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791635615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:20,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:20,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:47:20,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302512604] [2022-01-31 17:47:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:47:20,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:47:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:47:20,134 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:20,773 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2022-01-31 17:47:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:47:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 17:47:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:20,774 INFO L225 Difference]: With dead ends: 231 [2022-01-31 17:47:20,774 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 17:47:20,774 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 [2022-01-31 17:47:20,775 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 240 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:20,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 26 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 17:47:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-01-31 17:47:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2022-01-31 17:47:20,795 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 143 [2022-01-31 17:47:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:20,797 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2022-01-31 17:47:20,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2022-01-31 17:47:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:47:20,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:20,798 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:20,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:47:20,798 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1800091857, now seen corresponding path program 33 times [2022-01-31 17:47:20,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:20,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788367164] [2022-01-31 17:47:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:20,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:20,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:20,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:20,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:21,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:21,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:21,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788367164] [2022-01-31 17:47:21,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788367164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:21,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:21,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:47:21,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140686846] [2022-01-31 17:47:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:21,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:47:21,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:47:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:47:21,249 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:21,921 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2022-01-31 17:47:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:47:21,921 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:47:21,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:21,927 INFO L225 Difference]: With dead ends: 237 [2022-01-31 17:47:21,927 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 17:47:21,928 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 [2022-01-31 17:47:21,929 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:21,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 46 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 17:47:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-01-31 17:47:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2022-01-31 17:47:21,946 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 147 [2022-01-31 17:47:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:21,946 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2022-01-31 17:47:21,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2022-01-31 17:47:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:47:21,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:21,947 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:21,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:47:21,947 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1447856555, now seen corresponding path program 34 times [2022-01-31 17:47:21,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835628276] [2022-01-31 17:47:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:21,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:21,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:21,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:21,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:22,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:22,481 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:22,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835628276] [2022-01-31 17:47:22,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [835628276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:22,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:22,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:47:22,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324634433] [2022-01-31 17:47:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:22,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:47:22,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:47:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:47:22,482 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:23,204 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2022-01-31 17:47:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:47:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 17:47:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:23,205 INFO L225 Difference]: With dead ends: 243 [2022-01-31 17:47:23,205 INFO L226 Difference]: Without dead ends: 162 [2022-01-31 17:47:23,206 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 [2022-01-31 17:47:23,206 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 271 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:23,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 31 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-31 17:47:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2022-01-31 17:47:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-01-31 17:47:23,224 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 151 [2022-01-31 17:47:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:23,224 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-01-31 17:47:23,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-01-31 17:47:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:47:23,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:23,225 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:23,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:47:23,225 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash -49045977, now seen corresponding path program 35 times [2022-01-31 17:47:23,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:23,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257399835] [2022-01-31 17:47:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:23,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:23,227 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:23,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:23,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:23,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:23,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:23,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257399835] [2022-01-31 17:47:23,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [257399835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:23,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:23,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:47:23,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301430701] [2022-01-31 17:47:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:23,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:47:23,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:47:23,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:47:23,715 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:24,433 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2022-01-31 17:47:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:47:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:47:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:24,435 INFO L225 Difference]: With dead ends: 249 [2022-01-31 17:47:24,435 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 17:47:24,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:47:24,437 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 242 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:24,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 56 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 17:47:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2022-01-31 17:47:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2022-01-31 17:47:24,455 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 155 [2022-01-31 17:47:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:24,455 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2022-01-31 17:47:24,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2022-01-31 17:47:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:47:24,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:24,456 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:24,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:47:24,456 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:24,457 INFO L85 PathProgramCache]: Analyzing trace with hash 227869859, now seen corresponding path program 36 times [2022-01-31 17:47:24,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:24,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070383808] [2022-01-31 17:47:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:24,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:24,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:24,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:24,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:24,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:24,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:24,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070383808] [2022-01-31 17:47:24,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2070383808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:24,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:24,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:47:24,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061834151] [2022-01-31 17:47:24,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:24,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:47:24,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:47:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:47:24,993 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:25,750 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2022-01-31 17:47:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:47:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:47:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:25,751 INFO L225 Difference]: With dead ends: 255 [2022-01-31 17:47:25,751 INFO L226 Difference]: Without dead ends: 170 [2022-01-31 17:47:25,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:47:25,753 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:25,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 46 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-31 17:47:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-01-31 17:47:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2022-01-31 17:47:25,772 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 159 [2022-01-31 17:47:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:25,772 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2022-01-31 17:47:25,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2022-01-31 17:47:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:47:25,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:25,773 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:25,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:47:25,773 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1109672673, now seen corresponding path program 37 times [2022-01-31 17:47:25,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:25,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513216483] [2022-01-31 17:47:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:25,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:25,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:25,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:25,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:26,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513216483] [2022-01-31 17:47:26,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513216483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:26,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:26,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:47:26,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740164369] [2022-01-31 17:47:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:26,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:47:26,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:47:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:47:26,299 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:27,074 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2022-01-31 17:47:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:47:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:47:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:27,075 INFO L225 Difference]: With dead ends: 261 [2022-01-31 17:47:27,075 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:47:27,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:47:27,077 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:27,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 31 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:47:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-01-31 17:47:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-01-31 17:47:27,097 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 163 [2022-01-31 17:47:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:27,097 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-01-31 17:47:27,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-01-31 17:47:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:47:27,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:27,098 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:27,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:47:27,098 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1970456475, now seen corresponding path program 38 times [2022-01-31 17:47:27,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:27,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119593119] [2022-01-31 17:47:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:27,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:27,100 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:27,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:27,103 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:27,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:27,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119593119] [2022-01-31 17:47:27,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [119593119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:27,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:27,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:47:27,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014948266] [2022-01-31 17:47:27,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:27,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:47:27,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:47:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:47:27,676 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:28,489 INFO L93 Difference]: Finished difference Result 267 states and 272 transitions. [2022-01-31 17:47:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:47:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 17:47:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:28,490 INFO L225 Difference]: With dead ends: 267 [2022-01-31 17:47:28,490 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 17:47:28,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:47:28,492 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:28,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 41 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 17:47:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2022-01-31 17:47:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-01-31 17:47:28,514 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 167 [2022-01-31 17:47:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:28,514 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-01-31 17:47:28,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-01-31 17:47:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:47:28,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:28,515 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:28,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:47:28,515 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1298474007, now seen corresponding path program 39 times [2022-01-31 17:47:28,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:28,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53424187] [2022-01-31 17:47:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:28,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:28,517 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:28,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:28,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:29,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:29,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:29,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53424187] [2022-01-31 17:47:29,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [53424187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:29,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:29,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:47:29,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895638531] [2022-01-31 17:47:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:29,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:47:29,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:47:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:47:29,083 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:29,898 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2022-01-31 17:47:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:47:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:47:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:29,899 INFO L225 Difference]: With dead ends: 273 [2022-01-31 17:47:29,899 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 17:47:29,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:47:29,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:29,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 51 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 17:47:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-01-31 17:47:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2022-01-31 17:47:29,922 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 171 [2022-01-31 17:47:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:29,923 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2022-01-31 17:47:29,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2022-01-31 17:47:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:47:29,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:29,923 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:29,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:47:29,924 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1874996589, now seen corresponding path program 40 times [2022-01-31 17:47:29,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:29,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767365056] [2022-01-31 17:47:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:29,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:29,932 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:29,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:29,934 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:30,525 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:30,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767365056] [2022-01-31 17:47:30,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767365056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:30,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:30,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:47:30,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211903268] [2022-01-31 17:47:30,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:30,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:47:30,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:47:30,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:47:30,526 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:31,426 INFO L93 Difference]: Finished difference Result 279 states and 284 transitions. [2022-01-31 17:47:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:47:31,426 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 17:47:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:31,427 INFO L225 Difference]: With dead ends: 279 [2022-01-31 17:47:31,427 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 17:47:31,428 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 [2022-01-31 17:47:31,430 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:31,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 31 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 17:47:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2022-01-31 17:47:31,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-01-31 17:47:31,461 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2022-01-31 17:47:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:31,461 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-01-31 17:47:31,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-01-31 17:47:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:47:31,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:31,462 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:31,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:47:31,462 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:31,462 INFO L85 PathProgramCache]: Analyzing trace with hash 973591311, now seen corresponding path program 41 times [2022-01-31 17:47:31,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:31,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082708687] [2022-01-31 17:47:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:31,465 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:31,465 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:31,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:31,469 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:32,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082708687] [2022-01-31 17:47:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082708687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:32,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:32,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:47:32,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641375303] [2022-01-31 17:47:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:32,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:47:32,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:47:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:47:32,121 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:33,040 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2022-01-31 17:47:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:47:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:47:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:33,045 INFO L225 Difference]: With dead ends: 285 [2022-01-31 17:47:33,045 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 17:47:33,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:47:33,045 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:33,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 31 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 17:47:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2022-01-31 17:47:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-01-31 17:47:33,070 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 179 [2022-01-31 17:47:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:33,070 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-01-31 17:47:33,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-01-31 17:47:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:47:33,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:33,071 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:33,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:47:33,071 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2018387339, now seen corresponding path program 42 times [2022-01-31 17:47:33,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133327385] [2022-01-31 17:47:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:33,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:33,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:33,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:33,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:33,712 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:33,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133327385] [2022-01-31 17:47:33,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [133327385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:33,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:33,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:47:33,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752425041] [2022-01-31 17:47:33,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:33,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:47:33,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:47:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:47:33,713 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:34,659 INFO L93 Difference]: Finished difference Result 291 states and 296 transitions. [2022-01-31 17:47:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:47:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 17:47:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:34,661 INFO L225 Difference]: With dead ends: 291 [2022-01-31 17:47:34,661 INFO L226 Difference]: Without dead ends: 194 [2022-01-31 17:47:34,661 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 [2022-01-31 17:47:34,662 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 319 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:34,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 31 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-31 17:47:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2022-01-31 17:47:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2022-01-31 17:47:34,686 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 183 [2022-01-31 17:47:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:34,687 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2022-01-31 17:47:34,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2022-01-31 17:47:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:47:34,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:34,687 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:34,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:47:34,688 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash 706464263, now seen corresponding path program 43 times [2022-01-31 17:47:34,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:34,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31430136] [2022-01-31 17:47:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:34,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:34,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:34,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:34,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:35,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31430136] [2022-01-31 17:47:35,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [31430136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:35,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:35,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:47:35,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531495714] [2022-01-31 17:47:35,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:35,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:47:35,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:47:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:47:35,370 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:36,337 INFO L93 Difference]: Finished difference Result 297 states and 302 transitions. [2022-01-31 17:47:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:47:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:47:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:36,338 INFO L225 Difference]: With dead ends: 297 [2022-01-31 17:47:36,338 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 17:47:36,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:47:36,340 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 293 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:36,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 41 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 17:47:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2022-01-31 17:47:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-01-31 17:47:36,368 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 187 [2022-01-31 17:47:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:36,368 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-01-31 17:47:36,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-01-31 17:47:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:47:36,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:36,369 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:36,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:47:36,369 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1610334339, now seen corresponding path program 44 times [2022-01-31 17:47:36,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:36,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021466906] [2022-01-31 17:47:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:36,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:36,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:36,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:36,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:37,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:37,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021466906] [2022-01-31 17:47:37,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2021466906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:37,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:37,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:47:37,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745166934] [2022-01-31 17:47:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:37,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:47:37,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:47:37,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:47:37,102 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:38,110 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2022-01-31 17:47:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:47:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 17:47:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:38,111 INFO L225 Difference]: With dead ends: 303 [2022-01-31 17:47:38,111 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 17:47:38,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:47:38,111 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 340 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:38,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 46 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 17:47:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-01-31 17:47:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2022-01-31 17:47:38,138 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 191 [2022-01-31 17:47:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:38,138 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2022-01-31 17:47:38,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2022-01-31 17:47:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:47:38,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:38,139 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:38,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:47:38,139 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash -604436225, now seen corresponding path program 45 times [2022-01-31 17:47:38,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:38,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548250166] [2022-01-31 17:47:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:38,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:38,141 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:38,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:38,144 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:38,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:38,843 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:38,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548250166] [2022-01-31 17:47:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548250166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:38,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:38,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:47:38,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977100128] [2022-01-31 17:47:38,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:38,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:47:38,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:47:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:47:38,844 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:39,859 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2022-01-31 17:47:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:47:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:47:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:39,863 INFO L225 Difference]: With dead ends: 309 [2022-01-31 17:47:39,863 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 17:47:39,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:47:39,864 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 286 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:39,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 56 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 17:47:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-01-31 17:47:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2022-01-31 17:47:39,894 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 195 [2022-01-31 17:47:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:39,895 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2022-01-31 17:47:39,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2022-01-31 17:47:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:47:39,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:39,895 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:39,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:47:39,896 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1851874437, now seen corresponding path program 46 times [2022-01-31 17:47:39,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:39,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905221626] [2022-01-31 17:47:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:39,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:39,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:39,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:39,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:40,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905221626] [2022-01-31 17:47:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905221626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:40,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:47:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446318341] [2022-01-31 17:47:40,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:47:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:47:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:47:40,764 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:41,850 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2022-01-31 17:47:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:47:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 17:47:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:41,851 INFO L225 Difference]: With dead ends: 315 [2022-01-31 17:47:41,851 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 17:47:41,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:47:41,851 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 318 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 46 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 17:47:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-01-31 17:47:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-01-31 17:47:41,881 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 199 [2022-01-31 17:47:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:41,881 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-01-31 17:47:41,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-01-31 17:47:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:47:41,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:41,882 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:41,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:47:41,882 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash 636981239, now seen corresponding path program 47 times [2022-01-31 17:47:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568088321] [2022-01-31 17:47:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:41,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:41,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:41,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:41,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:42,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:42,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568088321] [2022-01-31 17:47:42,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [568088321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:42,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:42,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:47:42,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326841737] [2022-01-31 17:47:42,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:42,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:47:42,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:42,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:47:42,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:47:42,651 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:43,759 INFO L93 Difference]: Finished difference Result 321 states and 326 transitions. [2022-01-31 17:47:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:47:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:47:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:43,760 INFO L225 Difference]: With dead ends: 321 [2022-01-31 17:47:43,761 INFO L226 Difference]: Without dead ends: 214 [2022-01-31 17:47:43,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:47:43,762 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 299 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:43,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 66 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-31 17:47:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-01-31 17:47:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2022-01-31 17:47:43,792 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 203 [2022-01-31 17:47:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:43,792 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2022-01-31 17:47:43,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2022-01-31 17:47:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:47:43,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:43,793 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:43,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:47:43,793 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1871629939, now seen corresponding path program 48 times [2022-01-31 17:47:43,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:43,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267562961] [2022-01-31 17:47:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:43,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:43,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:43,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:43,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:44,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267562961] [2022-01-31 17:47:44,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [267562961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:44,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:44,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:47:44,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907005411] [2022-01-31 17:47:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:44,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:47:44,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:47:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:47:44,592 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:45,725 INFO L93 Difference]: Finished difference Result 327 states and 332 transitions. [2022-01-31 17:47:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:47:45,725 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 17:47:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:45,726 INFO L225 Difference]: With dead ends: 327 [2022-01-31 17:47:45,726 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 17:47:45,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:47:45,727 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:45,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 41 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 17:47:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2022-01-31 17:47:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2022-01-31 17:47:45,758 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 207 [2022-01-31 17:47:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:45,758 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2022-01-31 17:47:45,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2022-01-31 17:47:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:47:45,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:45,759 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:45,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:47:45,759 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -160473361, now seen corresponding path program 49 times [2022-01-31 17:47:45,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699021435] [2022-01-31 17:47:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:45,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:45,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:45,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:45,764 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:46,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:46,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699021435] [2022-01-31 17:47:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [699021435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:46,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:46,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:47:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313072959] [2022-01-31 17:47:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:46,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:47:46,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:47:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:47:46,561 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:47,749 INFO L93 Difference]: Finished difference Result 333 states and 338 transitions. [2022-01-31 17:47:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:47:47,749 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:47:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:47,750 INFO L225 Difference]: With dead ends: 333 [2022-01-31 17:47:47,750 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 17:47:47,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:47:47,751 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 388 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:47,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 31 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 17:47:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2022-01-31 17:47:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-01-31 17:47:47,790 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 211 [2022-01-31 17:47:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:47,790 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-01-31 17:47:47,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-01-31 17:47:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:47:47,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:47,791 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:47,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:47:47,791 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1948533099, now seen corresponding path program 50 times [2022-01-31 17:47:47,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726036429] [2022-01-31 17:47:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:47,793 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:47,793 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:47,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:47,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:48,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:48,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726036429] [2022-01-31 17:47:48,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726036429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:48,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:48,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:47:48,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146150034] [2022-01-31 17:47:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:48,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:47:48,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:47:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:47:48,619 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:49,864 INFO L93 Difference]: Finished difference Result 339 states and 344 transitions. [2022-01-31 17:47:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:47:49,865 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:47:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:49,866 INFO L225 Difference]: With dead ends: 339 [2022-01-31 17:47:49,866 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 17:47:49,866 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 [2022-01-31 17:47:49,867 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 347 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:49,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 51 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 17:47:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2022-01-31 17:47:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2022-01-31 17:47:49,900 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 215 [2022-01-31 17:47:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:49,901 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2022-01-31 17:47:49,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2022-01-31 17:47:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:47:49,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:49,902 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:49,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:47:49,902 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1404597735, now seen corresponding path program 51 times [2022-01-31 17:47:49,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:49,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378584994] [2022-01-31 17:47:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:49,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:49,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:49,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:49,907 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:50,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:50,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378584994] [2022-01-31 17:47:50,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [378584994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:50,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:50,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:47:50,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601427893] [2022-01-31 17:47:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:50,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:47:50,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:47:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:47:50,776 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:52,042 INFO L93 Difference]: Finished difference Result 345 states and 350 transitions. [2022-01-31 17:47:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:47:52,043 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:47:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:52,044 INFO L225 Difference]: With dead ends: 345 [2022-01-31 17:47:52,044 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 17:47:52,044 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 [2022-01-31 17:47:52,045 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 346 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:52,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 51 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 17:47:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2022-01-31 17:47:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2022-01-31 17:47:52,082 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 219 [2022-01-31 17:47:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2022-01-31 17:47:52,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2022-01-31 17:47:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:47:52,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:52,083 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:52,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:47:52,084 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash 834075747, now seen corresponding path program 52 times [2022-01-31 17:47:52,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:52,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510016787] [2022-01-31 17:47:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:52,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:52,085 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:52,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:52,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:53,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510016787] [2022-01-31 17:47:53,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [510016787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:53,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:53,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:47:53,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957026089] [2022-01-31 17:47:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:53,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:47:53,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:47:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:47:53,088 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:54,382 INFO L93 Difference]: Finished difference Result 351 states and 356 transitions. [2022-01-31 17:47:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:47:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 17:47:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:54,383 INFO L225 Difference]: With dead ends: 351 [2022-01-31 17:47:54,383 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 17:47:54,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:47:54,384 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 367 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:54,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 36 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 17:47:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2022-01-31 17:47:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2022-01-31 17:47:54,419 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 223 [2022-01-31 17:47:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:54,420 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2022-01-31 17:47:54,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2022-01-31 17:47:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:47:54,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:54,421 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:54,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:47:54,421 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:54,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1546310879, now seen corresponding path program 53 times [2022-01-31 17:47:54,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:54,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896173830] [2022-01-31 17:47:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:54,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:54,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:54,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:54,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:55,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:55,345 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896173830] [2022-01-31 17:47:55,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896173830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:55,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:55,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:47:55,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860972247] [2022-01-31 17:47:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:47:55,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:47:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:47:55,346 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:56,712 INFO L93 Difference]: Finished difference Result 357 states and 362 transitions. [2022-01-31 17:47:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:47:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:47:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:56,714 INFO L225 Difference]: With dead ends: 357 [2022-01-31 17:47:56,714 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 17:47:56,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:47:56,715 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 363 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:56,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 41 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:47:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 17:47:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2022-01-31 17:47:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2022-01-31 17:47:56,753 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 227 [2022-01-31 17:47:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:56,753 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2022-01-31 17:47:56,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2022-01-31 17:47:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:47:56,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:56,754 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:56,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:47:56,754 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:56,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:56,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1386151771, now seen corresponding path program 54 times [2022-01-31 17:47:56,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:56,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14968903] [2022-01-31 17:47:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:56,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:56,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:56,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:56,760 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:57,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:57,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14968903] [2022-01-31 17:47:57,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [14968903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:57,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:57,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:47:57,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580333940] [2022-01-31 17:47:57,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:57,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:47:57,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:47:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:47:57,735 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:59,127 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2022-01-31 17:47:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:47:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 17:47:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:59,129 INFO L225 Difference]: With dead ends: 363 [2022-01-31 17:47:59,129 INFO L226 Difference]: Without dead ends: 242 [2022-01-31 17:47:59,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:47:59,130 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 344 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:59,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 56 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:47:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-31 17:47:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2022-01-31 17:47:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-01-31 17:47:59,168 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 231 [2022-01-31 17:47:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:59,168 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-01-31 17:47:59,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-01-31 17:47:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:47:59,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:59,169 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:47:59,170 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:59,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1176402903, now seen corresponding path program 55 times [2022-01-31 17:47:59,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:59,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587643388] [2022-01-31 17:47:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:59,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:59,171 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:59,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:59,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:00,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587643388] [2022-01-31 17:48:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587643388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:00,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:48:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234244695] [2022-01-31 17:48:00,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:00,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:48:00,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:48:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:48:00,178 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:01,618 INFO L93 Difference]: Finished difference Result 369 states and 374 transitions. [2022-01-31 17:48:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:48:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:48:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:01,619 INFO L225 Difference]: With dead ends: 369 [2022-01-31 17:48:01,619 INFO L226 Difference]: Without dead ends: 246 [2022-01-31 17:48:01,620 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 [2022-01-31 17:48:01,620 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 359 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:01,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 46 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:48:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-31 17:48:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-01-31 17:48:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-01-31 17:48:01,660 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 235 [2022-01-31 17:48:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:01,661 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-01-31 17:48:01,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-01-31 17:48:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:48:01,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:01,662 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:01,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:48:01,662 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1724626349, now seen corresponding path program 56 times [2022-01-31 17:48:01,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:01,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462641691] [2022-01-31 17:48:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:01,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:01,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:01,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:01,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:02,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462641691] [2022-01-31 17:48:02,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462641691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:02,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:02,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:48:02,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559129511] [2022-01-31 17:48:02,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:02,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:48:02,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:48:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:48:02,738 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:04,252 INFO L93 Difference]: Finished difference Result 375 states and 380 transitions. [2022-01-31 17:48:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:48:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 17:48:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:04,253 INFO L225 Difference]: With dead ends: 375 [2022-01-31 17:48:04,253 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 17:48:04,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:48:04,254 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 332 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:04,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 66 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 17:48:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2022-01-31 17:48:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2022-01-31 17:48:04,295 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 239 [2022-01-31 17:48:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:04,295 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2022-01-31 17:48:04,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2022-01-31 17:48:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:48:04,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:04,296 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:48:04,296 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1609263823, now seen corresponding path program 57 times [2022-01-31 17:48:04,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:04,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915649562] [2022-01-31 17:48:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:04,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:04,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:04,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:04,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:05,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:05,392 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:05,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915649562] [2022-01-31 17:48:05,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915649562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:05,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:05,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:48:05,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745846932] [2022-01-31 17:48:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:05,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:48:05,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:05,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:48:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:48:05,394 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:06,925 INFO L93 Difference]: Finished difference Result 381 states and 386 transitions. [2022-01-31 17:48:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:48:06,926 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:48:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:06,926 INFO L225 Difference]: With dead ends: 381 [2022-01-31 17:48:06,927 INFO L226 Difference]: Without dead ends: 254 [2022-01-31 17:48:06,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:48:06,927 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 429 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:06,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 41 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-01-31 17:48:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2022-01-31 17:48:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 254 transitions. [2022-01-31 17:48:06,970 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 254 transitions. Word has length 243 [2022-01-31 17:48:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:06,970 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 254 transitions. [2022-01-31 17:48:06,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 254 transitions. [2022-01-31 17:48:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:48:06,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:06,971 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:06,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:48:06,971 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -540091061, now seen corresponding path program 58 times [2022-01-31 17:48:06,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:06,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240907508] [2022-01-31 17:48:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:06,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:06,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:06,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:06,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:08,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:08,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:08,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240907508] [2022-01-31 17:48:08,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [240907508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:08,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:08,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:48:08,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778587538] [2022-01-31 17:48:08,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:08,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:48:08,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:48:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:48:08,118 INFO L87 Difference]: Start difference. First operand 252 states and 254 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:09,704 INFO L93 Difference]: Finished difference Result 387 states and 392 transitions. [2022-01-31 17:48:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:48:09,705 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 17:48:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:09,705 INFO L225 Difference]: With dead ends: 387 [2022-01-31 17:48:09,705 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:48:09,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:48:09,706 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 412 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:09,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 46 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:48:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2022-01-31 17:48:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2022-01-31 17:48:09,756 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 247 [2022-01-31 17:48:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:09,757 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2022-01-31 17:48:09,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2022-01-31 17:48:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:48:09,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:09,758 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:09,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:48:09,758 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 266969543, now seen corresponding path program 59 times [2022-01-31 17:48:09,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:09,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31856644] [2022-01-31 17:48:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:09,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:09,759 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:09,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:09,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:10,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:10,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31856644] [2022-01-31 17:48:10,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [31856644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:10,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:10,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:48:10,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58873410] [2022-01-31 17:48:10,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:10,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:48:10,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:48:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:48:10,873 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:12,533 INFO L93 Difference]: Finished difference Result 393 states and 398 transitions. [2022-01-31 17:48:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:48:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:48:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:12,534 INFO L225 Difference]: With dead ends: 393 [2022-01-31 17:48:12,534 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 17:48:12,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:48:12,537 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 404 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:12,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 46 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 17:48:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2022-01-31 17:48:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2022-01-31 17:48:12,586 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 251 [2022-01-31 17:48:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:12,586 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2022-01-31 17:48:12,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2022-01-31 17:48:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:48:12,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:12,592 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:12,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:48:12,592 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:12,592 INFO L85 PathProgramCache]: Analyzing trace with hash 415676483, now seen corresponding path program 60 times [2022-01-31 17:48:12,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:12,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234511724] [2022-01-31 17:48:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:12,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:12,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:12,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:12,598 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:13,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:13,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234511724] [2022-01-31 17:48:13,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234511724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:13,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:13,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:48:13,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219618495] [2022-01-31 17:48:13,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:13,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:48:13,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:48:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:48:13,761 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:15,455 INFO L93 Difference]: Finished difference Result 399 states and 404 transitions. [2022-01-31 17:48:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:48:15,456 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 17:48:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:15,456 INFO L225 Difference]: With dead ends: 399 [2022-01-31 17:48:15,456 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 17:48:15,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:48:15,457 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 426 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:15,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 41 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 17:48:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-01-31 17:48:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2022-01-31 17:48:15,510 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 255 [2022-01-31 17:48:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:15,510 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2022-01-31 17:48:15,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2022-01-31 17:48:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:48:15,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:15,511 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:15,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:48:15,511 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -730783553, now seen corresponding path program 61 times [2022-01-31 17:48:15,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600316182] [2022-01-31 17:48:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:15,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:15,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:15,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:15,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:16,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:16,688 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:16,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600316182] [2022-01-31 17:48:16,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [600316182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:16,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:16,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:48:16,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177623269] [2022-01-31 17:48:16,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:16,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:48:16,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:48:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:48:16,690 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:18,400 INFO L93 Difference]: Finished difference Result 405 states and 410 transitions. [2022-01-31 17:48:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:48:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:48:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:18,401 INFO L225 Difference]: With dead ends: 405 [2022-01-31 17:48:18,401 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 17:48:18,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:48:18,402 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 417 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:18,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 46 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 17:48:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268. [2022-01-31 17:48:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 270 transitions. [2022-01-31 17:48:18,450 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 270 transitions. Word has length 259 [2022-01-31 17:48:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:18,450 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 270 transitions. [2022-01-31 17:48:18,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 270 transitions. [2022-01-31 17:48:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:48:18,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:18,451 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:18,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:48:18,451 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1316215611, now seen corresponding path program 62 times [2022-01-31 17:48:18,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:18,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290299395] [2022-01-31 17:48:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:18,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:18,453 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:18,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:18,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:19,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:19,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290299395] [2022-01-31 17:48:19,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290299395] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:19,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:19,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:48:19,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537137565] [2022-01-31 17:48:19,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:19,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:48:19,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:19,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:48:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:48:19,730 INFO L87 Difference]: Start difference. First operand 268 states and 270 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:21,557 INFO L93 Difference]: Finished difference Result 411 states and 416 transitions. [2022-01-31 17:48:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:48:21,557 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 17:48:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:21,558 INFO L225 Difference]: With dead ends: 411 [2022-01-31 17:48:21,558 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 17:48:21,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:48:21,559 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 488 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:21,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 51 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 17:48:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2022-01-31 17:48:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2022-01-31 17:48:21,627 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 263 [2022-01-31 17:48:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:21,627 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2022-01-31 17:48:21,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2022-01-31 17:48:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:48:21,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:21,628 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:21,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:48:21,628 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:21,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1138354103, now seen corresponding path program 63 times [2022-01-31 17:48:21,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:21,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262304680] [2022-01-31 17:48:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:21,630 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:21,630 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:21,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:21,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:22,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:22,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262304680] [2022-01-31 17:48:22,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262304680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:22,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:22,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:48:22,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333031682] [2022-01-31 17:48:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:22,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:48:22,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:48:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:48:22,893 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:24,705 INFO L93 Difference]: Finished difference Result 417 states and 422 transitions. [2022-01-31 17:48:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:48:24,705 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:48:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:24,706 INFO L225 Difference]: With dead ends: 417 [2022-01-31 17:48:24,706 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 17:48:24,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:48:24,707 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 495 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:24,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 41 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 17:48:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2022-01-31 17:48:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2022-01-31 17:48:24,758 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 267 [2022-01-31 17:48:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2022-01-31 17:48:24,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2022-01-31 17:48:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:48:24,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:24,760 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:24,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:48:24,760 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1557248461, now seen corresponding path program 64 times [2022-01-31 17:48:24,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:24,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011392828] [2022-01-31 17:48:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:24,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:24,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:24,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:24,773 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:26,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011392828] [2022-01-31 17:48:26,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011392828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:26,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:26,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:48:26,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577270546] [2022-01-31 17:48:26,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:26,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:48:26,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:48:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:48:26,048 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:27,908 INFO L93 Difference]: Finished difference Result 423 states and 428 transitions. [2022-01-31 17:48:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:48:27,908 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:48:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:27,909 INFO L225 Difference]: With dead ends: 423 [2022-01-31 17:48:27,909 INFO L226 Difference]: Without dead ends: 282 [2022-01-31 17:48:27,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:48:27,910 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 422 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:27,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 46 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-31 17:48:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2022-01-31 17:48:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.010948905109489) internal successors, (277), 274 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2022-01-31 17:48:27,966 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 271 [2022-01-31 17:48:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:27,966 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2022-01-31 17:48:27,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2022-01-31 17:48:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:48:27,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:27,967 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:27,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:48:27,967 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 209450671, now seen corresponding path program 65 times [2022-01-31 17:48:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:27,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137697613] [2022-01-31 17:48:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:27,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:27,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:27,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:27,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:29,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:29,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137697613] [2022-01-31 17:48:29,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [137697613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:29,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:29,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:48:29,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138797093] [2022-01-31 17:48:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:29,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:48:29,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:48:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:48:29,324 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:31,256 INFO L93 Difference]: Finished difference Result 429 states and 434 transitions. [2022-01-31 17:48:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:48:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:48:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:31,257 INFO L225 Difference]: With dead ends: 429 [2022-01-31 17:48:31,258 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 17:48:31,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:48:31,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 433 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:31,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 51 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 17:48:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2022-01-31 17:48:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 286 transitions. [2022-01-31 17:48:31,314 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 286 transitions. Word has length 275 [2022-01-31 17:48:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:31,314 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 286 transitions. [2022-01-31 17:48:31,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 286 transitions. [2022-01-31 17:48:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:48:31,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:31,315 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:31,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:48:31,316 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1364064555, now seen corresponding path program 66 times [2022-01-31 17:48:31,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:31,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229555204] [2022-01-31 17:48:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:31,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:31,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:31,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:31,322 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:32,696 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229555204] [2022-01-31 17:48:32,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229555204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:32,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:32,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:48:32,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293304081] [2022-01-31 17:48:32,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:32,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:48:32,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:48:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:48:32,698 INFO L87 Difference]: Start difference. First operand 284 states and 286 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:34,707 INFO L93 Difference]: Finished difference Result 435 states and 440 transitions. [2022-01-31 17:48:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:48:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 17:48:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:34,708 INFO L225 Difference]: With dead ends: 435 [2022-01-31 17:48:34,708 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 17:48:34,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:48:34,709 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 422 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:34,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 56 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 17:48:34,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2022-01-31 17:48:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 290 transitions. [2022-01-31 17:48:34,767 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 290 transitions. Word has length 279 [2022-01-31 17:48:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:34,768 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 290 transitions. [2022-01-31 17:48:34,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 290 transitions. [2022-01-31 17:48:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:48:34,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:34,769 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:34,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:48:34,769 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash -189837913, now seen corresponding path program 67 times [2022-01-31 17:48:34,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:34,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121760442] [2022-01-31 17:48:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:34,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:34,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:34,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:34,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:36,205 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121760442] [2022-01-31 17:48:36,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [121760442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:36,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:36,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:48:36,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249243473] [2022-01-31 17:48:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:36,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:48:36,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:48:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:48:36,207 INFO L87 Difference]: Start difference. First operand 288 states and 290 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:38,241 INFO L93 Difference]: Finished difference Result 441 states and 446 transitions. [2022-01-31 17:48:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:48:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:48:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:38,242 INFO L225 Difference]: With dead ends: 441 [2022-01-31 17:48:38,242 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 17:48:38,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:48:38,243 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 485 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:38,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 41 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 17:48:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 292. [2022-01-31 17:48:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.0104895104895104) internal successors, (289), 286 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 294 transitions. [2022-01-31 17:48:38,312 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 294 transitions. Word has length 283 [2022-01-31 17:48:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:38,312 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 294 transitions. [2022-01-31 17:48:38,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 294 transitions. [2022-01-31 17:48:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:48:38,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:38,313 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:38,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:48:38,313 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:38,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1423248349, now seen corresponding path program 68 times [2022-01-31 17:48:38,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:38,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525568445] [2022-01-31 17:48:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:38,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:38,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:38,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:38,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:39,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:39,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525568445] [2022-01-31 17:48:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525568445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:39,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:39,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:48:39,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989995244] [2022-01-31 17:48:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:39,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:48:39,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:48:39,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:48:39,767 INFO L87 Difference]: Start difference. First operand 292 states and 294 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:41,849 INFO L93 Difference]: Finished difference Result 447 states and 452 transitions. [2022-01-31 17:48:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:48:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 17:48:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:41,850 INFO L225 Difference]: With dead ends: 447 [2022-01-31 17:48:41,850 INFO L226 Difference]: Without dead ends: 298 [2022-01-31 17:48:41,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:48:41,851 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 483 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:41,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 36 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-31 17:48:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2022-01-31 17:48:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 298 transitions. [2022-01-31 17:48:41,910 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 298 transitions. Word has length 287 [2022-01-31 17:48:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:41,910 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 298 transitions. [2022-01-31 17:48:41,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 298 transitions. [2022-01-31 17:48:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:48:41,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:41,911 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:41,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:48:41,911 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash -624169825, now seen corresponding path program 69 times [2022-01-31 17:48:41,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:41,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530459532] [2022-01-31 17:48:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:41,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:41,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:41,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:41,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:43,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:43,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:43,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530459532] [2022-01-31 17:48:43,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530459532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:43,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:43,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:48:43,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435983668] [2022-01-31 17:48:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:48:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:48:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:48:43,499 INFO L87 Difference]: Start difference. First operand 296 states and 298 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:45,675 INFO L93 Difference]: Finished difference Result 453 states and 458 transitions. [2022-01-31 17:48:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:48:45,675 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:48:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:45,676 INFO L225 Difference]: With dead ends: 453 [2022-01-31 17:48:45,676 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 17:48:45,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:48:45,677 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 477 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:45,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 41 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 17:48:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 300. [2022-01-31 17:48:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 302 transitions. [2022-01-31 17:48:45,744 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 302 transitions. Word has length 291 [2022-01-31 17:48:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:45,744 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 302 transitions. [2022-01-31 17:48:45,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 302 transitions. [2022-01-31 17:48:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:48:45,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:45,746 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:45,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:48:45,746 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash 454899483, now seen corresponding path program 70 times [2022-01-31 17:48:45,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:45,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930166633] [2022-01-31 17:48:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:45,747 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:45,747 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:45,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:45,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:47,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:47,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930166633] [2022-01-31 17:48:47,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930166633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:47,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:47,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:48:47,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607706519] [2022-01-31 17:48:47,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:47,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:48:47,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:48:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:48:47,258 INFO L87 Difference]: Start difference. First operand 300 states and 302 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:49,462 INFO L93 Difference]: Finished difference Result 459 states and 464 transitions. [2022-01-31 17:48:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:48:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 17:48:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:49,464 INFO L225 Difference]: With dead ends: 459 [2022-01-31 17:48:49,464 INFO L226 Difference]: Without dead ends: 306 [2022-01-31 17:48:49,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:48:49,465 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 495 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:49,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 46 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-31 17:48:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2022-01-31 17:48:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.0100671140939597) internal successors, (301), 298 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 306 transitions. [2022-01-31 17:48:49,526 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 306 transitions. Word has length 295 [2022-01-31 17:48:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:49,526 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 306 transitions. [2022-01-31 17:48:49,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 306 transitions. [2022-01-31 17:48:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:48:49,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:49,528 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:49,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:48:49,528 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1255550057, now seen corresponding path program 71 times [2022-01-31 17:48:49,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37166537] [2022-01-31 17:48:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:49,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:49,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:49,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:49,535 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:51,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:51,130 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:51,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37166537] [2022-01-31 17:48:51,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37166537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:51,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:51,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:48:51,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618163766] [2022-01-31 17:48:51,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:51,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:48:51,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:51,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:48:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:48:51,132 INFO L87 Difference]: Start difference. First operand 304 states and 306 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:53,421 INFO L93 Difference]: Finished difference Result 465 states and 470 transitions. [2022-01-31 17:48:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:48:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:48:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:53,422 INFO L225 Difference]: With dead ends: 465 [2022-01-31 17:48:53,422 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 17:48:53,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:48:53,423 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 568 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:53,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 36 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 17:48:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2022-01-31 17:48:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2022-01-31 17:48:53,488 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 299 [2022-01-31 17:48:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:53,488 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2022-01-31 17:48:53,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2022-01-31 17:48:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:48:53,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:53,489 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:53,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:48:53,489 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 595378707, now seen corresponding path program 72 times [2022-01-31 17:48:53,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:53,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455114512] [2022-01-31 17:48:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:53,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:53,491 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:53,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:53,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:55,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:55,105 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455114512] [2022-01-31 17:48:55,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1455114512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:55,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:55,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:48:55,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628264419] [2022-01-31 17:48:55,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:55,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:48:55,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:48:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:48:55,107 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:57,425 INFO L93 Difference]: Finished difference Result 471 states and 476 transitions. [2022-01-31 17:48:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:48:57,425 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 17:48:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:57,426 INFO L225 Difference]: With dead ends: 471 [2022-01-31 17:48:57,426 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 17:48:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:48:57,427 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 548 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:57,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 41 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:48:57,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 17:48:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2022-01-31 17:48:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2022-01-31 17:48:57,492 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 303 [2022-01-31 17:48:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:57,492 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2022-01-31 17:48:57,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2022-01-31 17:48:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:48:57,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:57,493 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:57,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:48:57,493 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:57,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1843330417, now seen corresponding path program 73 times [2022-01-31 17:48:57,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272209642] [2022-01-31 17:48:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:57,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:57,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:57,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:57,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:59,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:59,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:59,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272209642] [2022-01-31 17:48:59,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272209642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:59,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:59,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:48:59,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332304576] [2022-01-31 17:48:59,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:59,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:48:59,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:48:59,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:48:59,135 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:01,576 INFO L93 Difference]: Finished difference Result 477 states and 482 transitions. [2022-01-31 17:49:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:49:01,581 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 17:49:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:01,582 INFO L225 Difference]: With dead ends: 477 [2022-01-31 17:49:01,582 INFO L226 Difference]: Without dead ends: 318 [2022-01-31 17:49:01,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:49:01,583 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 563 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:01,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 46 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:49:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-01-31 17:49:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 316. [2022-01-31 17:49:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2022-01-31 17:49:01,654 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 307 [2022-01-31 17:49:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:01,654 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2022-01-31 17:49:01,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2022-01-31 17:49:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:49:01,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:01,656 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:01,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:49:01,656 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:01,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1587647755, now seen corresponding path program 74 times [2022-01-31 17:49:01,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:01,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440381587] [2022-01-31 17:49:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:01,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:01,658 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:01,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:01,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:03,361 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:03,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440381587] [2022-01-31 17:49:03,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [440381587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:03,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:03,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:49:03,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241474974] [2022-01-31 17:49:03,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:03,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:49:03,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:49:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:49:03,363 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:05,784 INFO L93 Difference]: Finished difference Result 483 states and 488 transitions. [2022-01-31 17:49:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:49:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 17:49:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:05,786 INFO L225 Difference]: With dead ends: 483 [2022-01-31 17:49:05,786 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 17:49:05,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:49:05,787 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 474 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:05,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 61 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:49:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 17:49:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2022-01-31 17:49:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 322 transitions. [2022-01-31 17:49:05,859 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 322 transitions. Word has length 311 [2022-01-31 17:49:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 322 transitions. [2022-01-31 17:49:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 322 transitions. [2022-01-31 17:49:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:49:05,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:05,860 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:05,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:49:05,861 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:05,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1744209529, now seen corresponding path program 75 times [2022-01-31 17:49:05,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:05,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769377821] [2022-01-31 17:49:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:05,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:05,863 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:05,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:05,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:07,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:07,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769377821] [2022-01-31 17:49:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [769377821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:07,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:07,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:49:07,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198496477] [2022-01-31 17:49:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:07,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:49:07,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:49:07,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:49:07,639 INFO L87 Difference]: Start difference. First operand 320 states and 322 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:10,140 INFO L93 Difference]: Finished difference Result 489 states and 494 transitions. [2022-01-31 17:49:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:49:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:49:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:10,142 INFO L225 Difference]: With dead ends: 489 [2022-01-31 17:49:10,142 INFO L226 Difference]: Without dead ends: 326 [2022-01-31 17:49:10,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:49:10,143 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 538 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:10,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 46 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:49:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-31 17:49:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2022-01-31 17:49:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.009433962264151) internal successors, (321), 318 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 326 transitions. [2022-01-31 17:49:10,221 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 326 transitions. Word has length 315 [2022-01-31 17:49:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:10,221 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 326 transitions. [2022-01-31 17:49:10,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 326 transitions. [2022-01-31 17:49:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:49:10,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:10,222 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:10,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:49:10,222 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2128850947, now seen corresponding path program 76 times [2022-01-31 17:49:10,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:10,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162862469] [2022-01-31 17:49:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:10,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:10,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:10,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:10,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:11,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:11,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162862469] [2022-01-31 17:49:11,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162862469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:11,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:11,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:49:11,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495148149] [2022-01-31 17:49:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:11,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:49:11,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:49:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:49:11,992 INFO L87 Difference]: Start difference. First operand 324 states and 326 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:14,598 INFO L93 Difference]: Finished difference Result 495 states and 500 transitions. [2022-01-31 17:49:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:49:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-01-31 17:49:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:14,599 INFO L225 Difference]: With dead ends: 495 [2022-01-31 17:49:14,599 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 17:49:14,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:49:14,600 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 573 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:14,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 51 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:49:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 17:49:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-01-31 17:49:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0093167701863355) internal successors, (325), 322 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-01-31 17:49:14,672 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 319 [2022-01-31 17:49:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:14,673 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-01-31 17:49:14,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-01-31 17:49:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:49:14,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:14,674 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:14,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:49:14,674 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash 87767167, now seen corresponding path program 77 times [2022-01-31 17:49:14,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:14,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079141917] [2022-01-31 17:49:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:14,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:14,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:14,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:16,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:16,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079141917] [2022-01-31 17:49:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079141917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:16,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:16,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:49:16,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418507959] [2022-01-31 17:49:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:16,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:49:16,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:49:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:49:16,495 INFO L87 Difference]: Start difference. First operand 328 states and 330 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:19,113 INFO L93 Difference]: Finished difference Result 501 states and 506 transitions. [2022-01-31 17:49:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:49:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 17:49:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:19,115 INFO L225 Difference]: With dead ends: 501 [2022-01-31 17:49:19,115 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 17:49:19,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:49:19,116 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 581 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:19,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 51 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:49:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 17:49:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-01-31 17:49:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 334 transitions. [2022-01-31 17:49:19,188 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 334 transitions. Word has length 323 [2022-01-31 17:49:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:19,188 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 334 transitions. [2022-01-31 17:49:19,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 334 transitions. [2022-01-31 17:49:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:49:19,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:19,189 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:19,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:49:19,189 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1318785787, now seen corresponding path program 78 times [2022-01-31 17:49:19,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:19,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689520164] [2022-01-31 17:49:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:19,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:19,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:19,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:19,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:21,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:21,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689520164] [2022-01-31 17:49:21,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689520164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:21,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:21,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:49:21,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877553795] [2022-01-31 17:49:21,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:21,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:49:21,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:49:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:49:21,054 INFO L87 Difference]: Start difference. First operand 332 states and 334 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:23,775 INFO L93 Difference]: Finished difference Result 507 states and 512 transitions. [2022-01-31 17:49:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:49:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:49:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:23,776 INFO L225 Difference]: With dead ends: 507 [2022-01-31 17:49:23,776 INFO L226 Difference]: Without dead ends: 338 [2022-01-31 17:49:23,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:49:23,778 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 488 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:23,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 61 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-31 17:49:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2022-01-31 17:49:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.009090909090909) internal successors, (333), 330 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2022-01-31 17:49:23,874 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 327 [2022-01-31 17:49:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:23,874 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2022-01-31 17:49:23,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2022-01-31 17:49:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:49:23,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:23,875 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:23,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:49:23,875 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 806240119, now seen corresponding path program 79 times [2022-01-31 17:49:23,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:23,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998899874] [2022-01-31 17:49:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:23,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:23,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:23,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:23,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:25,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:25,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:25,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998899874] [2022-01-31 17:49:25,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [998899874] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:25,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:25,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:49:25,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124234978] [2022-01-31 17:49:25,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:25,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:49:25,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:25,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:49:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:49:25,764 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:28,513 INFO L93 Difference]: Finished difference Result 513 states and 518 transitions. [2022-01-31 17:49:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:49:28,513 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:49:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:28,514 INFO L225 Difference]: With dead ends: 513 [2022-01-31 17:49:28,514 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 17:49:28,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:49:28,524 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 568 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:28,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 41 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 17:49:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2022-01-31 17:49:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0089820359281436) internal successors, (337), 334 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 342 transitions. [2022-01-31 17:49:28,612 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 342 transitions. Word has length 331 [2022-01-31 17:49:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:28,613 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 342 transitions. [2022-01-31 17:49:28,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 342 transitions. [2022-01-31 17:49:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:49:28,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:28,614 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:28,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:49:28,614 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:28,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1340097037, now seen corresponding path program 80 times [2022-01-31 17:49:28,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:28,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533569323] [2022-01-31 17:49:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:28,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:28,616 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:28,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:28,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:30,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:30,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:30,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533569323] [2022-01-31 17:49:30,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1533569323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:30,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:30,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:49:30,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696163483] [2022-01-31 17:49:30,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:30,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:49:30,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:49:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:49:30,551 INFO L87 Difference]: Start difference. First operand 340 states and 342 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:33,371 INFO L93 Difference]: Finished difference Result 519 states and 524 transitions. [2022-01-31 17:49:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:49:33,371 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 17:49:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:33,372 INFO L225 Difference]: With dead ends: 519 [2022-01-31 17:49:33,372 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 17:49:33,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:49:33,374 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 522 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:33,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 61 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 17:49:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2022-01-31 17:49:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 346 transitions. [2022-01-31 17:49:33,458 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 346 transitions. Word has length 335 [2022-01-31 17:49:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:33,459 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 346 transitions. [2022-01-31 17:49:33,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 346 transitions. [2022-01-31 17:49:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:49:33,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:33,460 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:33,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:49:33,460 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:33,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:33,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2032497041, now seen corresponding path program 81 times [2022-01-31 17:49:33,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:33,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458191324] [2022-01-31 17:49:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:33,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:33,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:33,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:33,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:35,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:35,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:35,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458191324] [2022-01-31 17:49:35,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [458191324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:35,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:35,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:49:35,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760816860] [2022-01-31 17:49:35,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:35,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:49:35,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:49:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:49:35,443 INFO L87 Difference]: Start difference. First operand 344 states and 346 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:38,355 INFO L93 Difference]: Finished difference Result 525 states and 530 transitions. [2022-01-31 17:49:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:49:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 17:49:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:38,356 INFO L225 Difference]: With dead ends: 525 [2022-01-31 17:49:38,356 INFO L226 Difference]: Without dead ends: 350 [2022-01-31 17:49:38,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:49:38,357 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 593 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:38,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 46 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-31 17:49:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 348. [2022-01-31 17:49:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.0087719298245614) internal successors, (345), 342 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 350 transitions. [2022-01-31 17:49:38,451 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 350 transitions. Word has length 339 [2022-01-31 17:49:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:38,451 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 350 transitions. [2022-01-31 17:49:38,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 350 transitions. [2022-01-31 17:49:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 17:49:38,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:38,453 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:38,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:49:38,453 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:38,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1647726357, now seen corresponding path program 82 times [2022-01-31 17:49:38,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939538458] [2022-01-31 17:49:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:38,454 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:38,454 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:38,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:38,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:40,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:40,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:40,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939538458] [2022-01-31 17:49:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [939538458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:40,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:40,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:49:40,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010173258] [2022-01-31 17:49:40,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:49:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:49:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:49:40,507 INFO L87 Difference]: Start difference. First operand 348 states and 350 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:43,521 INFO L93 Difference]: Finished difference Result 531 states and 536 transitions. [2022-01-31 17:49:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:49:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-01-31 17:49:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:43,524 INFO L225 Difference]: With dead ends: 531 [2022-01-31 17:49:43,524 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 17:49:43,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:49:43,525 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 577 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:43,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 56 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 17:49:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2022-01-31 17:49:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0086705202312138) internal successors, (349), 346 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 354 transitions. [2022-01-31 17:49:43,609 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 354 transitions. Word has length 343 [2022-01-31 17:49:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:43,609 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 354 transitions. [2022-01-31 17:49:43,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 354 transitions. [2022-01-31 17:49:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:49:43,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:43,610 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:43,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:49:43,610 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1879562905, now seen corresponding path program 83 times [2022-01-31 17:49:43,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:43,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771228919] [2022-01-31 17:49:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:43,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:43,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:43,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:43,619 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:45,670 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771228919] [2022-01-31 17:49:45,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [771228919] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:45,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:45,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:49:45,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553747290] [2022-01-31 17:49:45,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:45,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:49:45,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:49:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:49:45,672 INFO L87 Difference]: Start difference. First operand 352 states and 354 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:48,688 INFO L93 Difference]: Finished difference Result 537 states and 542 transitions. [2022-01-31 17:49:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:49:48,688 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:49:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:48,689 INFO L225 Difference]: With dead ends: 537 [2022-01-31 17:49:48,689 INFO L226 Difference]: Without dead ends: 358 [2022-01-31 17:49:48,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:49:48,690 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 602 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:48,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 41 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-31 17:49:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2022-01-31 17:49:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 358 transitions. [2022-01-31 17:49:48,774 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 358 transitions. Word has length 347 [2022-01-31 17:49:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:48,774 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 358 transitions. [2022-01-31 17:49:48,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 358 transitions. [2022-01-31 17:49:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:49:48,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:48,776 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:48,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:49:48,776 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash 703654883, now seen corresponding path program 84 times [2022-01-31 17:49:48,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:48,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061507768] [2022-01-31 17:49:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:48,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:48,777 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:48,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:48,784 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:50,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:50,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:50,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061507768] [2022-01-31 17:49:50,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1061507768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:50,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:50,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:49:50,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301570097] [2022-01-31 17:49:50,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:50,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:49:50,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:50,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:49:50,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:49:50,893 INFO L87 Difference]: Start difference. First operand 356 states and 358 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:54,008 INFO L93 Difference]: Finished difference Result 543 states and 548 transitions. [2022-01-31 17:49:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:49:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 17:49:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:54,009 INFO L225 Difference]: With dead ends: 543 [2022-01-31 17:49:54,009 INFO L226 Difference]: Without dead ends: 362 [2022-01-31 17:49:54,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:49:54,010 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:54,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 41 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-31 17:49:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2022-01-31 17:49:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0084745762711864) internal successors, (357), 354 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 362 transitions. [2022-01-31 17:49:54,104 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 362 transitions. Word has length 351 [2022-01-31 17:49:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:54,104 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 362 transitions. [2022-01-31 17:49:54,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 362 transitions. [2022-01-31 17:49:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:49:54,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:54,106 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:49:54,106 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash -373357473, now seen corresponding path program 85 times [2022-01-31 17:49:54,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:54,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295005277] [2022-01-31 17:49:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:54,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:54,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:54,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:54,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:56,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:56,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:56,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295005277] [2022-01-31 17:49:56,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295005277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:56,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:56,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:49:56,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071245637] [2022-01-31 17:49:56,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:56,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:49:56,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:49:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:49:56,290 INFO L87 Difference]: Start difference. First operand 360 states and 362 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:59,418 INFO L93 Difference]: Finished difference Result 549 states and 554 transitions. [2022-01-31 17:49:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:49:59,419 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:49:59,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:59,420 INFO L225 Difference]: With dead ends: 549 [2022-01-31 17:49:59,420 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 17:49:59,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:49:59,421 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 601 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:59,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 61 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:49:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 17:49:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-01-31 17:49:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.0083798882681565) internal successors, (361), 358 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 366 transitions. [2022-01-31 17:49:59,508 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 366 transitions. Word has length 355 [2022-01-31 17:49:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:59,508 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 366 transitions. [2022-01-31 17:49:59,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 366 transitions. [2022-01-31 17:49:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:49:59,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:59,509 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:59,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:49:59,509 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2129489627, now seen corresponding path program 86 times [2022-01-31 17:49:59,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716470106] [2022-01-31 17:49:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:59,511 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:59,511 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:59,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:59,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:01,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:01,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:01,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716470106] [2022-01-31 17:50:01,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [716470106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:01,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:01,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:50:01,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006723872] [2022-01-31 17:50:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:01,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:50:01,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:50:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:50:01,763 INFO L87 Difference]: Start difference. First operand 364 states and 366 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:05,012 INFO L93 Difference]: Finished difference Result 555 states and 560 transitions. [2022-01-31 17:50:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:50:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 17:50:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:05,014 INFO L225 Difference]: With dead ends: 555 [2022-01-31 17:50:05,014 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 17:50:05,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:50:05,015 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 614 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:05,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 46 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 17:50:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2022-01-31 17:50:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 370 transitions. [2022-01-31 17:50:05,105 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 370 transitions. Word has length 359 [2022-01-31 17:50:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:05,105 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 370 transitions. [2022-01-31 17:50:05,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 370 transitions. [2022-01-31 17:50:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:50:05,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:05,107 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:05,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:50:05,107 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1250372439, now seen corresponding path program 87 times [2022-01-31 17:50:05,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:05,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056733662] [2022-01-31 17:50:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:05,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:05,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:05,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:05,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:07,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:07,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:07,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056733662] [2022-01-31 17:50:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056733662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:07,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:07,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:50:07,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59239470] [2022-01-31 17:50:07,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:07,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:50:07,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:07,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:50:07,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:50:07,389 INFO L87 Difference]: Start difference. First operand 368 states and 370 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:10,662 INFO L93 Difference]: Finished difference Result 561 states and 566 transitions. [2022-01-31 17:50:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:50:10,662 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:50:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:10,663 INFO L225 Difference]: With dead ends: 561 [2022-01-31 17:50:10,663 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 17:50:10,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:50:10,665 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 620 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:10,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 46 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 17:50:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 372. [2022-01-31 17:50:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.0081967213114753) internal successors, (369), 366 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 374 transitions. [2022-01-31 17:50:10,764 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 374 transitions. Word has length 363 [2022-01-31 17:50:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:10,764 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 374 transitions. [2022-01-31 17:50:10,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 374 transitions. [2022-01-31 17:50:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 17:50:10,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:10,766 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:10,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:50:10,766 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -552125997, now seen corresponding path program 88 times [2022-01-31 17:50:10,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164453819] [2022-01-31 17:50:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:10,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:10,768 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:10,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:10,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:13,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:13,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164453819] [2022-01-31 17:50:13,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [164453819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:13,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:13,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:50:13,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369744625] [2022-01-31 17:50:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:13,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:50:13,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:50:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:50:13,086 INFO L87 Difference]: Start difference. First operand 372 states and 374 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:16,510 INFO L93 Difference]: Finished difference Result 567 states and 572 transitions. [2022-01-31 17:50:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:50:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 367 [2022-01-31 17:50:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:16,511 INFO L225 Difference]: With dead ends: 567 [2022-01-31 17:50:16,511 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 17:50:16,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:50:16,513 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 756 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:16,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 46 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 17:50:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2022-01-31 17:50:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.008108108108108) internal successors, (373), 370 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2022-01-31 17:50:16,614 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 367 [2022-01-31 17:50:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:16,614 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2022-01-31 17:50:16,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2022-01-31 17:50:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:50:16,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:16,616 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:16,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:50:16,616 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2136434097, now seen corresponding path program 89 times [2022-01-31 17:50:16,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666874755] [2022-01-31 17:50:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:16,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:16,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:16,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:16,625 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:18,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:18,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:18,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666874755] [2022-01-31 17:50:18,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [666874755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:18,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:18,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:50:18,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462270785] [2022-01-31 17:50:18,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:18,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:50:18,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:18,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:50:18,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:50:18,950 INFO L87 Difference]: Start difference. First operand 376 states and 378 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:22,463 INFO L93 Difference]: Finished difference Result 573 states and 578 transitions. [2022-01-31 17:50:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:50:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 17:50:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:22,464 INFO L225 Difference]: With dead ends: 573 [2022-01-31 17:50:22,464 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 17:50:22,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:50:22,466 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 654 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:22,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 51 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 17:50:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2022-01-31 17:50:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 382 transitions. [2022-01-31 17:50:22,569 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 382 transitions. Word has length 371 [2022-01-31 17:50:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:22,569 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 382 transitions. [2022-01-31 17:50:22,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 382 transitions. [2022-01-31 17:50:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:50:22,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:22,571 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:22,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:50:22,571 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1530508085, now seen corresponding path program 90 times [2022-01-31 17:50:22,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:22,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888707028] [2022-01-31 17:50:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:22,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:22,573 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:22,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:22,580 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:24,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:24,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:24,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888707028] [2022-01-31 17:50:24,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [888707028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:24,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:24,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:50:24,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585247125] [2022-01-31 17:50:24,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:24,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:50:24,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:50:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:50:24,982 INFO L87 Difference]: Start difference. First operand 380 states and 382 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:28,546 INFO L93 Difference]: Finished difference Result 579 states and 584 transitions. [2022-01-31 17:50:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:50:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 375 [2022-01-31 17:50:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:28,547 INFO L225 Difference]: With dead ends: 579 [2022-01-31 17:50:28,547 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 17:50:28,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:50:28,549 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 636 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:28,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 46 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 17:50:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2022-01-31 17:50:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.007936507936508) internal successors, (381), 378 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 386 transitions. [2022-01-31 17:50:28,654 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 386 transitions. Word has length 375 [2022-01-31 17:50:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 386 transitions. [2022-01-31 17:50:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 386 transitions. [2022-01-31 17:50:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 17:50:28,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:28,663 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:28,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:50:28,663 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1920684359, now seen corresponding path program 91 times [2022-01-31 17:50:28,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:28,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074974712] [2022-01-31 17:50:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:28,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:28,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:28,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:28,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:31,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:31,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:31,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074974712] [2022-01-31 17:50:31,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074974712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:31,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:31,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:50:31,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4787687] [2022-01-31 17:50:31,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:31,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:50:31,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:50:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:50:31,125 INFO L87 Difference]: Start difference. First operand 384 states and 386 transitions. Second operand has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:34,786 INFO L93 Difference]: Finished difference Result 585 states and 590 transitions. [2022-01-31 17:50:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:50:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 379 [2022-01-31 17:50:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:34,787 INFO L225 Difference]: With dead ends: 585 [2022-01-31 17:50:34,787 INFO L226 Difference]: Without dead ends: 390 [2022-01-31 17:50:34,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:50:34,789 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 681 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:34,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 46 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-31 17:50:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2022-01-31 17:50:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.0078534031413613) internal successors, (385), 382 states have internal predecessors, (385), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-01-31 17:50:34,897 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 379 [2022-01-31 17:50:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-01-31 17:50:34,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-01-31 17:50:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-31 17:50:34,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:34,899 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:50:34,899 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1112713155, now seen corresponding path program 92 times [2022-01-31 17:50:34,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:34,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255283418] [2022-01-31 17:50:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:34,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:34,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:34,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:34,908 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:37,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255283418] [2022-01-31 17:50:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [255283418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:37,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:37,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:50:37,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885324565] [2022-01-31 17:50:37,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:37,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:50:37,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:50:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:50:37,436 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:41,117 INFO L93 Difference]: Finished difference Result 591 states and 596 transitions. [2022-01-31 17:50:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:50:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-01-31 17:50:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:41,118 INFO L225 Difference]: With dead ends: 591 [2022-01-31 17:50:41,118 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 17:50:41,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:50:41,120 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 620 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:41,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 61 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 17:50:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2022-01-31 17:50:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 394 transitions. [2022-01-31 17:50:41,233 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 394 transitions. Word has length 383 [2022-01-31 17:50:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:41,233 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 394 transitions. [2022-01-31 17:50:41,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 394 transitions. [2022-01-31 17:50:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:50:41,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:41,235 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:41,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:50:41,235 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 509038655, now seen corresponding path program 93 times [2022-01-31 17:50:41,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:41,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728832051] [2022-01-31 17:50:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:41,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:41,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:41,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:41,245 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:43,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:43,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728832051] [2022-01-31 17:50:43,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [728832051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:43,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:43,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:50:43,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333977828] [2022-01-31 17:50:43,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:43,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:50:43,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:50:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:50:43,830 INFO L87 Difference]: Start difference. First operand 392 states and 394 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:47,532 INFO L93 Difference]: Finished difference Result 597 states and 602 transitions. [2022-01-31 17:50:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:50:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 17:50:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:47,533 INFO L225 Difference]: With dead ends: 597 [2022-01-31 17:50:47,533 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 17:50:47,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:50:47,534 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 711 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:47,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 31 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 17:50:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2022-01-31 17:50:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 398 transitions. [2022-01-31 17:50:47,638 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 398 transitions. Word has length 387 [2022-01-31 17:50:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:47,638 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 398 transitions. [2022-01-31 17:50:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 398 transitions. [2022-01-31 17:50:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-01-31 17:50:47,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:47,640 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:47,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:50:47,640 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1108626107, now seen corresponding path program 94 times [2022-01-31 17:50:47,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:47,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446302101] [2022-01-31 17:50:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:47,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:47,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:47,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:47,650 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:50,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:50,245 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446302101] [2022-01-31 17:50:50,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446302101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:50,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:50,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:50:50,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386600506] [2022-01-31 17:50:50,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:50,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:50:50,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:50:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:50:50,250 INFO L87 Difference]: Start difference. First operand 396 states and 398 transitions. Second operand has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:54,148 INFO L93 Difference]: Finished difference Result 603 states and 608 transitions. [2022-01-31 17:50:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:50:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 391 [2022-01-31 17:50:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:54,149 INFO L225 Difference]: With dead ends: 603 [2022-01-31 17:50:54,149 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 17:50:54,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:50:54,151 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 662 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:54,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 41 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:50:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 17:50:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2022-01-31 17:50:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.0076142131979695) internal successors, (397), 394 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 402 transitions. [2022-01-31 17:50:54,271 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 402 transitions. Word has length 391 [2022-01-31 17:50:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:54,271 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 402 transitions. [2022-01-31 17:50:54,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 402 transitions. [2022-01-31 17:50:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 17:50:54,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:54,273 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:54,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:50:54,273 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1701537993, now seen corresponding path program 95 times [2022-01-31 17:50:54,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:54,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216221518] [2022-01-31 17:50:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:54,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:54,275 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:54,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:54,283 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:56,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:56,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216221518] [2022-01-31 17:50:56,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216221518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:56,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:56,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:50:56,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870604057] [2022-01-31 17:50:56,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:56,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:50:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:50:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:50:56,945 INFO L87 Difference]: Start difference. First operand 400 states and 402 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:00,897 INFO L93 Difference]: Finished difference Result 609 states and 614 transitions. [2022-01-31 17:51:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:51:00,898 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 17:51:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:00,899 INFO L225 Difference]: With dead ends: 609 [2022-01-31 17:51:00,899 INFO L226 Difference]: Without dead ends: 406 [2022-01-31 17:51:00,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:51:00,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 742 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:00,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 61 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:51:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-31 17:51:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2022-01-31 17:51:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 398 states have (on average 1.0075376884422111) internal successors, (401), 398 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 406 transitions. [2022-01-31 17:51:01,012 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 406 transitions. Word has length 395 [2022-01-31 17:51:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:01,012 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 406 transitions. [2022-01-31 17:51:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 406 transitions. [2022-01-31 17:51:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-01-31 17:51:01,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:01,014 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:01,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:51:01,014 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1180906931, now seen corresponding path program 96 times [2022-01-31 17:51:01,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:01,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860585038] [2022-01-31 17:51:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:01,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:01,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:01,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:01,026 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:03,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:03,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860585038] [2022-01-31 17:51:03,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860585038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:03,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:03,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:51:03,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737095379] [2022-01-31 17:51:03,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:03,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:51:03,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:51:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:51:03,805 INFO L87 Difference]: Start difference. First operand 404 states and 406 transitions. Second operand has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:07,892 INFO L93 Difference]: Finished difference Result 615 states and 620 transitions. [2022-01-31 17:51:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:51:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 399 [2022-01-31 17:51:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:07,893 INFO L225 Difference]: With dead ends: 615 [2022-01-31 17:51:07,893 INFO L226 Difference]: Without dead ends: 410 [2022-01-31 17:51:07,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:51:07,895 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 738 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:07,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 51 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:51:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-31 17:51:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2022-01-31 17:51:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.007462686567164) internal successors, (405), 402 states have internal predecessors, (405), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 410 transitions. [2022-01-31 17:51:08,006 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 410 transitions. Word has length 399 [2022-01-31 17:51:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:08,006 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 410 transitions. [2022-01-31 17:51:08,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 410 transitions. [2022-01-31 17:51:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-31 17:51:08,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:08,008 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:08,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:51:08,008 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 361440815, now seen corresponding path program 97 times [2022-01-31 17:51:08,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512205208] [2022-01-31 17:51:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:08,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:08,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:08,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:08,019 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:10,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512205208] [2022-01-31 17:51:10,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512205208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:10,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:10,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:51:10,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579474824] [2022-01-31 17:51:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:10,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:51:10,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:10,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:51:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:51:10,851 INFO L87 Difference]: Start difference. First operand 408 states and 410 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:15,051 INFO L93 Difference]: Finished difference Result 621 states and 626 transitions. [2022-01-31 17:51:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:51:15,052 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 403 [2022-01-31 17:51:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:15,053 INFO L225 Difference]: With dead ends: 621 [2022-01-31 17:51:15,053 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 17:51:15,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:51:15,055 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 769 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:15,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 46 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:51:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 17:51:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2022-01-31 17:51:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 406 states have (on average 1.0073891625615763) internal successors, (409), 406 states have internal predecessors, (409), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 414 transitions. [2022-01-31 17:51:15,172 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 414 transitions. Word has length 403 [2022-01-31 17:51:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:15,172 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 414 transitions. [2022-01-31 17:51:15,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 414 transitions. [2022-01-31 17:51:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-01-31 17:51:15,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:15,174 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:15,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:51:15,174 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:15,174 INFO L85 PathProgramCache]: Analyzing trace with hash 160917675, now seen corresponding path program 98 times [2022-01-31 17:51:15,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:15,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952687484] [2022-01-31 17:51:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:15,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:15,176 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:15,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:15,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:18,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952687484] [2022-01-31 17:51:18,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952687484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:18,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:18,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:51:18,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539304053] [2022-01-31 17:51:18,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:18,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:51:18,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:51:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:51:18,033 INFO L87 Difference]: Start difference. First operand 412 states and 414 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:22,382 INFO L93 Difference]: Finished difference Result 627 states and 632 transitions. [2022-01-31 17:51:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:51:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 407 [2022-01-31 17:51:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:22,383 INFO L225 Difference]: With dead ends: 627 [2022-01-31 17:51:22,383 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 17:51:22,385 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 [2022-01-31 17:51:22,385 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 744 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:22,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 41 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:51:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 17:51:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2022-01-31 17:51:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.0073170731707317) internal successors, (413), 410 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 418 transitions. [2022-01-31 17:51:22,500 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 418 transitions. Word has length 407 [2022-01-31 17:51:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:22,500 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 418 transitions. [2022-01-31 17:51:22,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 418 transitions. [2022-01-31 17:51:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:51:22,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:22,502 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:22,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:51:22,502 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -711787225, now seen corresponding path program 99 times [2022-01-31 17:51:22,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:22,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811091020] [2022-01-31 17:51:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:22,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:22,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:22,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:22,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:25,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811091020] [2022-01-31 17:51:25,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811091020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:25,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:25,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:51:25,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372098785] [2022-01-31 17:51:25,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:25,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:51:25,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:25,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:51:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:51:25,470 INFO L87 Difference]: Start difference. First operand 416 states and 418 transitions. Second operand has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:29,790 INFO L93 Difference]: Finished difference Result 633 states and 638 transitions. [2022-01-31 17:51:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:51:29,790 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:51:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:29,791 INFO L225 Difference]: With dead ends: 633 [2022-01-31 17:51:29,791 INFO L226 Difference]: Without dead ends: 422 [2022-01-31 17:51:29,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:51:29,793 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 697 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:29,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 41 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:51:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-31 17:51:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-01-31 17:51:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 414 states have (on average 1.0072463768115942) internal successors, (417), 414 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2022-01-31 17:51:29,923 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 411 [2022-01-31 17:51:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:29,923 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2022-01-31 17:51:29,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2022-01-31 17:51:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-01-31 17:51:29,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:29,925 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:29,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:51:29,925 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1577640867, now seen corresponding path program 100 times [2022-01-31 17:51:29,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076880664] [2022-01-31 17:51:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:29,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:29,926 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:29,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:29,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:32,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076880664] [2022-01-31 17:51:32,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076880664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:32,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:32,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:51:32,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400814786] [2022-01-31 17:51:32,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:32,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:51:32,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:51:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:51:32,962 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:37,584 INFO L93 Difference]: Finished difference Result 639 states and 644 transitions. [2022-01-31 17:51:37,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:51:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 415 [2022-01-31 17:51:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:37,585 INFO L225 Difference]: With dead ends: 639 [2022-01-31 17:51:37,585 INFO L226 Difference]: Without dead ends: 426 [2022-01-31 17:51:37,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:51:37,587 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 745 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:37,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 46 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:51:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-31 17:51:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2022-01-31 17:51:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.007177033492823) internal successors, (421), 418 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 426 transitions. [2022-01-31 17:51:37,708 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 426 transitions. Word has length 415 [2022-01-31 17:51:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:37,708 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 426 transitions. [2022-01-31 17:51:37,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 426 transitions. [2022-01-31 17:51:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 17:51:37,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:37,710 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:37,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:51:37,710 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash 956570655, now seen corresponding path program 101 times [2022-01-31 17:51:37,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:37,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251994415] [2022-01-31 17:51:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:37,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:37,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:37,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:37,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:40,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:40,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251994415] [2022-01-31 17:51:40,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1251994415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:40,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:40,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:51:40,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842473316] [2022-01-31 17:51:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:40,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:51:40,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:51:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:51:40,777 INFO L87 Difference]: Start difference. First operand 424 states and 426 transitions. Second operand has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:45,372 INFO L93 Difference]: Finished difference Result 645 states and 650 transitions. [2022-01-31 17:51:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:51:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 419 [2022-01-31 17:51:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:45,373 INFO L225 Difference]: With dead ends: 645 [2022-01-31 17:51:45,373 INFO L226 Difference]: Without dead ends: 430 [2022-01-31 17:51:45,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:51:45,374 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 740 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:45,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 61 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:51:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-31 17:51:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 428. [2022-01-31 17:51:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 422 states have (on average 1.0071090047393365) internal successors, (425), 422 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 430 transitions. [2022-01-31 17:51:45,497 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 430 transitions. Word has length 419 [2022-01-31 17:51:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:45,497 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 430 transitions. [2022-01-31 17:51:45,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 430 transitions. [2022-01-31 17:51:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-01-31 17:51:45,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:45,499 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:45,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:51:45,499 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 772777627, now seen corresponding path program 102 times [2022-01-31 17:51:45,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082617373] [2022-01-31 17:51:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:45,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:45,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:45,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:45,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:48,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:48,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:48,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082617373] [2022-01-31 17:51:48,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082617373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:48,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:48,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:51:48,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975402220] [2022-01-31 17:51:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:48,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:51:48,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:51:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:51:48,653 INFO L87 Difference]: Start difference. First operand 428 states and 430 transitions. Second operand has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:53,275 INFO L93 Difference]: Finished difference Result 651 states and 656 transitions. [2022-01-31 17:51:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:51:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 423 [2022-01-31 17:51:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:53,276 INFO L225 Difference]: With dead ends: 651 [2022-01-31 17:51:53,276 INFO L226 Difference]: Without dead ends: 434 [2022-01-31 17:51:53,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:51:53,278 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 699 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:53,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 46 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:51:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-31 17:51:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-01-31 17:51:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.0070422535211268) internal successors, (429), 426 states have internal predecessors, (429), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 434 transitions. [2022-01-31 17:51:53,413 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 434 transitions. Word has length 423 [2022-01-31 17:51:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:53,414 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 434 transitions. [2022-01-31 17:51:53,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 434 transitions. [2022-01-31 17:51:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-31 17:51:53,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:53,415 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:53,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:51:53,415 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1237941481, now seen corresponding path program 103 times [2022-01-31 17:51:53,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:53,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950579529] [2022-01-31 17:51:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:53,417 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:53,417 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:53,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:53,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:56,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:56,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:56,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950579529] [2022-01-31 17:51:56,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950579529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:56,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:56,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:51:56,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426216268] [2022-01-31 17:51:56,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:51:56,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:51:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:51:56,541 INFO L87 Difference]: Start difference. First operand 432 states and 434 transitions. Second operand has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:01,262 INFO L93 Difference]: Finished difference Result 657 states and 662 transitions. [2022-01-31 17:52:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:52:01,262 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 427 [2022-01-31 17:52:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:01,263 INFO L225 Difference]: With dead ends: 657 [2022-01-31 17:52:01,263 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 17:52:01,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:52:01,265 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 793 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:01,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 41 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 17:52:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2022-01-31 17:52:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 430 states have (on average 1.0069767441860464) internal successors, (433), 430 states have internal predecessors, (433), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 438 transitions. [2022-01-31 17:52:01,404 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 438 transitions. Word has length 427 [2022-01-31 17:52:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:01,405 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 438 transitions. [2022-01-31 17:52:01,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 438 transitions. [2022-01-31 17:52:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-01-31 17:52:01,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:01,406 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:01,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:52:01,406 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2080616851, now seen corresponding path program 104 times [2022-01-31 17:52:01,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:01,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011334593] [2022-01-31 17:52:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:01,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:01,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:01,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:01,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:04,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:04,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011334593] [2022-01-31 17:52:04,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2011334593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:04,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:04,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:52:04,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262290193] [2022-01-31 17:52:04,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:04,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:52:04,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:04,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:52:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:52:04,604 INFO L87 Difference]: Start difference. First operand 436 states and 438 transitions. Second operand has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:09,426 INFO L93 Difference]: Finished difference Result 663 states and 668 transitions. [2022-01-31 17:52:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:52:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 431 [2022-01-31 17:52:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:09,428 INFO L225 Difference]: With dead ends: 663 [2022-01-31 17:52:09,428 INFO L226 Difference]: Without dead ends: 442 [2022-01-31 17:52:09,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:52:09,430 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 741 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:09,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 56 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-31 17:52:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2022-01-31 17:52:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.0069124423963134) internal successors, (437), 434 states have internal predecessors, (437), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 442 transitions. [2022-01-31 17:52:09,559 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 442 transitions. Word has length 431 [2022-01-31 17:52:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:09,559 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 442 transitions. [2022-01-31 17:52:09,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 442 transitions. [2022-01-31 17:52:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:52:09,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:09,560 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:09,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:52:09,561 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:09,561 INFO L85 PathProgramCache]: Analyzing trace with hash -612224497, now seen corresponding path program 105 times [2022-01-31 17:52:09,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:09,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304013338] [2022-01-31 17:52:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:09,562 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:09,562 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:09,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:09,573 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:12,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:12,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:12,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304013338] [2022-01-31 17:52:12,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304013338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:12,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:12,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:52:12,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574990098] [2022-01-31 17:52:12,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:12,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:52:12,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:52:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:52:12,843 INFO L87 Difference]: Start difference. First operand 440 states and 442 transitions. Second operand has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:17,700 INFO L93 Difference]: Finished difference Result 669 states and 674 transitions. [2022-01-31 17:52:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:52:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 17:52:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:17,701 INFO L225 Difference]: With dead ends: 669 [2022-01-31 17:52:17,701 INFO L226 Difference]: Without dead ends: 446 [2022-01-31 17:52:17,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:52:17,703 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 705 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:17,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 46 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-31 17:52:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-01-31 17:52:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 438 states have (on average 1.0068493150684932) internal successors, (441), 438 states have internal predecessors, (441), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 446 transitions. [2022-01-31 17:52:17,834 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 446 transitions. Word has length 435 [2022-01-31 17:52:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:17,834 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 446 transitions. [2022-01-31 17:52:17,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 446 transitions. [2022-01-31 17:52:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-01-31 17:52:17,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:17,836 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:17,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:52:17,836 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1648166027, now seen corresponding path program 106 times [2022-01-31 17:52:17,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:17,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968691631] [2022-01-31 17:52:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:17,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:17,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:17,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:17,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:21,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:21,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968691631] [2022-01-31 17:52:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968691631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:21,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:52:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685857638] [2022-01-31 17:52:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:52:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:52:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:52:21,162 INFO L87 Difference]: Start difference. First operand 444 states and 446 transitions. Second operand has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:26,216 INFO L93 Difference]: Finished difference Result 675 states and 680 transitions. [2022-01-31 17:52:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:52:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 439 [2022-01-31 17:52:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:26,217 INFO L225 Difference]: With dead ends: 675 [2022-01-31 17:52:26,217 INFO L226 Difference]: Without dead ends: 450 [2022-01-31 17:52:26,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:52:26,219 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 857 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:26,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 46 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-31 17:52:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2022-01-31 17:52:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.006787330316742) internal successors, (445), 442 states have internal predecessors, (445), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 450 transitions. [2022-01-31 17:52:26,353 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 450 transitions. Word has length 439 [2022-01-31 17:52:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:26,353 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 450 transitions. [2022-01-31 17:52:26,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 450 transitions. [2022-01-31 17:52:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 17:52:26,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:26,355 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:26,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:52:26,355 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:26,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1329539335, now seen corresponding path program 107 times [2022-01-31 17:52:26,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:26,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996796922] [2022-01-31 17:52:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:26,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:26,356 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:26,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:26,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:29,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:29,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996796922] [2022-01-31 17:52:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [996796922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:29,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:29,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:52:29,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980068470] [2022-01-31 17:52:29,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:29,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:52:29,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:29,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:52:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:52:29,740 INFO L87 Difference]: Start difference. First operand 448 states and 450 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:34,981 INFO L93 Difference]: Finished difference Result 681 states and 686 transitions. [2022-01-31 17:52:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:52:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 17:52:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:34,982 INFO L225 Difference]: With dead ends: 681 [2022-01-31 17:52:34,982 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 17:52:34,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:52:34,984 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 800 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:34,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 46 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 17:52:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2022-01-31 17:52:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 454 transitions. [2022-01-31 17:52:35,133 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 454 transitions. Word has length 443 [2022-01-31 17:52:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:35,133 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 454 transitions. [2022-01-31 17:52:35,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 454 transitions. [2022-01-31 17:52:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-01-31 17:52:35,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:35,135 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:52:35,135 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 320053123, now seen corresponding path program 108 times [2022-01-31 17:52:35,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:35,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595388463] [2022-01-31 17:52:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:35,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:35,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:35,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:38,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:38,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595388463] [2022-01-31 17:52:38,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [595388463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:38,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:38,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:52:38,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537822687] [2022-01-31 17:52:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:38,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:52:38,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:52:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:52:38,659 INFO L87 Difference]: Start difference. First operand 452 states and 454 transitions. Second operand has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:44,006 INFO L93 Difference]: Finished difference Result 687 states and 692 transitions. [2022-01-31 17:52:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:52:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 447 [2022-01-31 17:52:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:44,007 INFO L225 Difference]: With dead ends: 687 [2022-01-31 17:52:44,007 INFO L226 Difference]: Without dead ends: 458 [2022-01-31 17:52:44,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:52:44,009 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 850 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:44,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 36 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-31 17:52:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2022-01-31 17:52:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 450 states have (on average 1.0066666666666666) internal successors, (453), 450 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2022-01-31 17:52:44,149 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 447 [2022-01-31 17:52:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:44,149 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2022-01-31 17:52:44,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2022-01-31 17:52:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 17:52:44,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:44,151 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:52:44,151 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:44,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:44,151 INFO L85 PathProgramCache]: Analyzing trace with hash -809146369, now seen corresponding path program 109 times [2022-01-31 17:52:44,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:44,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616100358] [2022-01-31 17:52:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:44,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:44,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:44,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:44,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:47,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:47,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616100358] [2022-01-31 17:52:47,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616100358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:47,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:47,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:52:47,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953287802] [2022-01-31 17:52:47,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:47,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:52:47,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:52:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:52:47,650 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:52,962 INFO L93 Difference]: Finished difference Result 693 states and 698 transitions. [2022-01-31 17:52:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:52:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 451 [2022-01-31 17:52:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:52,963 INFO L225 Difference]: With dead ends: 693 [2022-01-31 17:52:52,963 INFO L226 Difference]: Without dead ends: 462 [2022-01-31 17:52:52,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:52:52,965 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 716 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:52,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 56 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:52:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-31 17:52:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-31 17:52:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 454 states have (on average 1.0066079295154184) internal successors, (457), 454 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 462 transitions. [2022-01-31 17:52:53,117 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 462 transitions. Word has length 451 [2022-01-31 17:52:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:53,117 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 462 transitions. [2022-01-31 17:52:53,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 462 transitions. [2022-01-31 17:52:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-01-31 17:52:53,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:53,119 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:53,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:52:53,119 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash -656440709, now seen corresponding path program 110 times [2022-01-31 17:52:53,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838170994] [2022-01-31 17:52:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:53,120 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:53,120 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:53,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:53,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:56,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:56,745 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:56,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838170994] [2022-01-31 17:52:56,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838170994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:56,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:56,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:52:56,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478930549] [2022-01-31 17:52:56,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:56,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:52:56,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:52:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:52:56,748 INFO L87 Difference]: Start difference. First operand 460 states and 462 transitions. Second operand has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:02,203 INFO L93 Difference]: Finished difference Result 699 states and 704 transitions. [2022-01-31 17:53:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:53:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 455 [2022-01-31 17:53:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:02,204 INFO L225 Difference]: With dead ends: 699 [2022-01-31 17:53:02,204 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 17:53:02,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:53:02,207 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 838 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:02,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 56 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:53:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 17:53:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464. [2022-01-31 17:53:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 458 states have (on average 1.0065502183406114) internal successors, (461), 458 states have internal predecessors, (461), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 466 transitions. [2022-01-31 17:53:02,363 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 466 transitions. Word has length 455 [2022-01-31 17:53:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:02,363 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 466 transitions. [2022-01-31 17:53:02,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 466 transitions. [2022-01-31 17:53:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:53:02,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:02,365 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:02,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:53:02,365 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash 862777079, now seen corresponding path program 111 times [2022-01-31 17:53:02,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:02,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91234497] [2022-01-31 17:53:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:02,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:02,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:02,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:02,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:06,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:06,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91234497] [2022-01-31 17:53:06,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [91234497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:06,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:06,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:53:06,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059655786] [2022-01-31 17:53:06,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:06,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:53:06,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:53:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:53:06,006 INFO L87 Difference]: Start difference. First operand 464 states and 466 transitions. Second operand has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:11,441 INFO L93 Difference]: Finished difference Result 705 states and 710 transitions. [2022-01-31 17:53:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:53:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 17:53:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:11,442 INFO L225 Difference]: With dead ends: 705 [2022-01-31 17:53:11,442 INFO L226 Difference]: Without dead ends: 470 [2022-01-31 17:53:11,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:53:11,445 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 816 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:11,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 41 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:53:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-31 17:53:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 468. [2022-01-31 17:53:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 462 states have (on average 1.0064935064935066) internal successors, (465), 462 states have internal predecessors, (465), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 470 transitions. [2022-01-31 17:53:11,591 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 470 transitions. Word has length 459 [2022-01-31 17:53:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:11,591 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 470 transitions. [2022-01-31 17:53:11,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 470 transitions. [2022-01-31 17:53:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-01-31 17:53:11,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:11,593 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:53:11,593 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 368618867, now seen corresponding path program 112 times [2022-01-31 17:53:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569063496] [2022-01-31 17:53:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:11,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:11,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:11,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:11,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:15,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569063496] [2022-01-31 17:53:15,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [569063496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:15,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:15,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:53:15,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259029620] [2022-01-31 17:53:15,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:15,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:53:15,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:53:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:53:15,315 INFO L87 Difference]: Start difference. First operand 468 states and 470 transitions. Second operand has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:21,024 INFO L93 Difference]: Finished difference Result 711 states and 716 transitions. [2022-01-31 17:53:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:53:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 463 [2022-01-31 17:53:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:21,025 INFO L225 Difference]: With dead ends: 711 [2022-01-31 17:53:21,025 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 17:53:21,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:53:21,027 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 811 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:21,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 46 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:53:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 17:53:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 472. [2022-01-31 17:53:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.0064377682403434) internal successors, (469), 466 states have internal predecessors, (469), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 474 transitions. [2022-01-31 17:53:21,176 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 474 transitions. Word has length 463 [2022-01-31 17:53:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:21,176 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 474 transitions. [2022-01-31 17:53:21,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 474 transitions. [2022-01-31 17:53:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:53:21,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:21,178 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:21,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:53:21,178 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1754119663, now seen corresponding path program 113 times [2022-01-31 17:53:21,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:21,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890219383] [2022-01-31 17:53:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:21,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:21,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:21,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:21,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:24,935 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890219383] [2022-01-31 17:53:24,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890219383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:24,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:24,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:53:24,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316269731] [2022-01-31 17:53:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:24,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:53:24,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:53:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:53:24,938 INFO L87 Difference]: Start difference. First operand 472 states and 474 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:30,618 INFO L93 Difference]: Finished difference Result 717 states and 722 transitions. [2022-01-31 17:53:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:53:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 467 [2022-01-31 17:53:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:30,619 INFO L225 Difference]: With dead ends: 717 [2022-01-31 17:53:30,619 INFO L226 Difference]: Without dead ends: 478 [2022-01-31 17:53:30,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:53:30,621 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 782 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:30,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 56 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:53:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-31 17:53:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 476. [2022-01-31 17:53:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 470 states have (on average 1.0063829787234042) internal successors, (473), 470 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 478 transitions. [2022-01-31 17:53:30,784 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 478 transitions. Word has length 467 [2022-01-31 17:53:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 478 transitions. [2022-01-31 17:53:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 478 transitions. [2022-01-31 17:53:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-01-31 17:53:30,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:30,786 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:53:30,787 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1152852075, now seen corresponding path program 114 times [2022-01-31 17:53:30,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:30,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46493611] [2022-01-31 17:53:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:30,788 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:30,788 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:30,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:34,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:34,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46493611] [2022-01-31 17:53:34,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [46493611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:34,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:34,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:53:34,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618811865] [2022-01-31 17:53:34,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:34,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:53:34,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:53:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:53:34,614 INFO L87 Difference]: Start difference. First operand 476 states and 478 transitions. Second operand has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:40,393 INFO L93 Difference]: Finished difference Result 723 states and 728 transitions. [2022-01-31 17:53:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:53:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 471 [2022-01-31 17:53:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:40,394 INFO L225 Difference]: With dead ends: 723 [2022-01-31 17:53:40,394 INFO L226 Difference]: Without dead ends: 482 [2022-01-31 17:53:40,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:53:40,396 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 955 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:40,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 36 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:53:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-31 17:53:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2022-01-31 17:53:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.0063291139240507) internal successors, (477), 474 states have internal predecessors, (477), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 482 transitions. [2022-01-31 17:53:40,561 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 482 transitions. Word has length 471 [2022-01-31 17:53:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 482 transitions. [2022-01-31 17:53:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 482 transitions. [2022-01-31 17:53:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 17:53:40,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:40,563 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:40,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:53:40,563 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:40,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1971311847, now seen corresponding path program 115 times [2022-01-31 17:53:40,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:40,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898085365] [2022-01-31 17:53:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:40,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:40,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:40,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:40,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:44,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898085365] [2022-01-31 17:53:44,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898085365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:44,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:44,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:53:44,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803245101] [2022-01-31 17:53:44,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:44,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:53:44,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:53:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:53:44,462 INFO L87 Difference]: Start difference. First operand 480 states and 482 transitions. Second operand has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:50,256 INFO L93 Difference]: Finished difference Result 729 states and 734 transitions. [2022-01-31 17:53:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:53:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 17:53:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:50,257 INFO L225 Difference]: With dead ends: 729 [2022-01-31 17:53:50,257 INFO L226 Difference]: Without dead ends: 486 [2022-01-31 17:53:50,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:53:50,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 858 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:50,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 51 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:53:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-31 17:53:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 484. [2022-01-31 17:53:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 478 states have (on average 1.006276150627615) internal successors, (481), 478 states have internal predecessors, (481), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 486 transitions. [2022-01-31 17:53:50,441 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 486 transitions. Word has length 475 [2022-01-31 17:53:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:50,441 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 486 transitions. [2022-01-31 17:53:50,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 486 transitions. [2022-01-31 17:53:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-01-31 17:53:50,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:50,443 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:50,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:53:50,443 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash -143467677, now seen corresponding path program 116 times [2022-01-31 17:53:50,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820994676] [2022-01-31 17:53:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:50,444 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:50,444 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:50,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:50,457 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:54,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:54,391 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:54,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820994676] [2022-01-31 17:53:54,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820994676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:54,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:54,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:53:54,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473706746] [2022-01-31 17:53:54,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:54,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:53:54,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:53:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:53:54,393 INFO L87 Difference]: Start difference. First operand 484 states and 486 transitions. Second operand has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:00,363 INFO L93 Difference]: Finished difference Result 735 states and 740 transitions. [2022-01-31 17:54:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:54:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 479 [2022-01-31 17:54:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:00,364 INFO L225 Difference]: With dead ends: 735 [2022-01-31 17:54:00,364 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 17:54:00,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:54:00,366 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 840 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:00,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 51 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:54:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 17:54:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 488. [2022-01-31 17:54:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 482 states have (on average 1.0062240663900415) internal successors, (485), 482 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 490 transitions. [2022-01-31 17:54:00,537 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 490 transitions. Word has length 479 [2022-01-31 17:54:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:00,537 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 490 transitions. [2022-01-31 17:54:00,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 490 transitions. [2022-01-31 17:54:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:54:00,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:00,539 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:00,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:54:00,539 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2023437279, now seen corresponding path program 117 times [2022-01-31 17:54:00,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:00,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465741633] [2022-01-31 17:54:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:00,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:00,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:00,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:00,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:04,529 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:04,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465741633] [2022-01-31 17:54:04,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465741633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:04,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:04,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:54:04,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733248537] [2022-01-31 17:54:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:04,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:54:04,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:54:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:54:04,531 INFO L87 Difference]: Start difference. First operand 488 states and 490 transitions. Second operand has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:10,530 INFO L93 Difference]: Finished difference Result 741 states and 746 transitions. [2022-01-31 17:54:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:54:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 17:54:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:10,531 INFO L225 Difference]: With dead ends: 741 [2022-01-31 17:54:10,531 INFO L226 Difference]: Without dead ends: 494 [2022-01-31 17:54:10,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:54:10,533 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 834 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:10,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 56 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:54:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-31 17:54:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 492. [2022-01-31 17:54:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 486 states have (on average 1.0061728395061729) internal successors, (489), 486 states have internal predecessors, (489), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 494 transitions. [2022-01-31 17:54:10,717 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 494 transitions. Word has length 483 [2022-01-31 17:54:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:10,717 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 494 transitions. [2022-01-31 17:54:10,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 494 transitions. [2022-01-31 17:54:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-01-31 17:54:10,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:10,719 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:10,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:54:10,719 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -662446501, now seen corresponding path program 118 times [2022-01-31 17:54:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938407407] [2022-01-31 17:54:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:10,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:10,720 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:10,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:10,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:14,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:14,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938407407] [2022-01-31 17:54:14,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938407407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:14,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:14,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:54:14,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564989851] [2022-01-31 17:54:14,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:14,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:54:14,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:14,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:54:14,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:54:14,801 INFO L87 Difference]: Start difference. First operand 492 states and 494 transitions. Second operand has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:20,896 INFO L93 Difference]: Finished difference Result 747 states and 752 transitions. [2022-01-31 17:54:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:54:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 487 [2022-01-31 17:54:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:20,898 INFO L225 Difference]: With dead ends: 747 [2022-01-31 17:54:20,898 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 17:54:20,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:54:20,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 880 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:20,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 36 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:54:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 17:54:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2022-01-31 17:54:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.006122448979592) internal successors, (493), 490 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 498 transitions. [2022-01-31 17:54:21,065 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 498 transitions. Word has length 487 [2022-01-31 17:54:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:21,066 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 498 transitions. [2022-01-31 17:54:21,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 498 transitions. [2022-01-31 17:54:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 17:54:21,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:21,068 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:21,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:54:21,068 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1472734505, now seen corresponding path program 119 times [2022-01-31 17:54:21,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418679785] [2022-01-31 17:54:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:21,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:21,075 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:21,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:21,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:25,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:25,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:25,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418679785] [2022-01-31 17:54:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [418679785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:25,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:25,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:54:25,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885781860] [2022-01-31 17:54:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:25,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:54:25,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:54:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:54:25,153 INFO L87 Difference]: Start difference. First operand 496 states and 498 transitions. Second operand has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:31,377 INFO L93 Difference]: Finished difference Result 753 states and 758 transitions. [2022-01-31 17:54:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:54:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 17:54:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:31,378 INFO L225 Difference]: With dead ends: 753 [2022-01-31 17:54:31,378 INFO L226 Difference]: Without dead ends: 502 [2022-01-31 17:54:31,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:54:31,381 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 823 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:31,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 41 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:54:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-31 17:54:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2022-01-31 17:54:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 494 states have (on average 1.0060728744939271) internal successors, (497), 494 states have internal predecessors, (497), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 502 transitions. [2022-01-31 17:54:31,549 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 502 transitions. Word has length 491 [2022-01-31 17:54:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:31,549 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 502 transitions. [2022-01-31 17:54:31,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 502 transitions. [2022-01-31 17:54:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:54:31,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:31,551 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:31,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:54:31,551 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1438504621, now seen corresponding path program 120 times [2022-01-31 17:54:31,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:31,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030046821] [2022-01-31 17:54:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:31,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:31,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:31,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:31,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:35,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:35,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:35,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030046821] [2022-01-31 17:54:35,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030046821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:35,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:35,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:54:35,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724344570] [2022-01-31 17:54:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:35,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:54:35,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:54:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:54:35,728 INFO L87 Difference]: Start difference. First operand 500 states and 502 transitions. Second operand has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:42,078 INFO L93 Difference]: Finished difference Result 759 states and 764 transitions. [2022-01-31 17:54:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:54:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 17:54:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:42,080 INFO L225 Difference]: With dead ends: 759 [2022-01-31 17:54:42,080 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 17:54:42,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:54:42,082 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 882 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:42,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 41 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:54:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 17:54:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2022-01-31 17:54:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.0060240963855422) internal successors, (501), 498 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 506 transitions. [2022-01-31 17:54:42,267 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 506 transitions. Word has length 495 [2022-01-31 17:54:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:42,267 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 506 transitions. [2022-01-31 17:54:42,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 506 transitions. [2022-01-31 17:54:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-01-31 17:54:42,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:42,270 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:42,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:54:42,270 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1387121103, now seen corresponding path program 121 times [2022-01-31 17:54:42,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:42,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031094633] [2022-01-31 17:54:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:42,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:42,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:42,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:42,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:46,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:46,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031094633] [2022-01-31 17:54:46,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031094633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:46,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:46,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:54:46,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328687703] [2022-01-31 17:54:46,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:46,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:54:46,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:54:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:54:46,503 INFO L87 Difference]: Start difference. First operand 504 states and 506 transitions. Second operand has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:52,984 INFO L93 Difference]: Finished difference Result 765 states and 770 transitions. [2022-01-31 17:54:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:54:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 499 [2022-01-31 17:54:52,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:52,985 INFO L225 Difference]: With dead ends: 765 [2022-01-31 17:54:52,985 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 17:54:52,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:54:52,987 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 936 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:52,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 51 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:54:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 17:54:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 508. [2022-01-31 17:54:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 502 states have (on average 1.0059760956175299) internal successors, (505), 502 states have internal predecessors, (505), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 510 transitions. [2022-01-31 17:54:53,173 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 510 transitions. Word has length 499 [2022-01-31 17:54:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:53,173 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 510 transitions. [2022-01-31 17:54:53,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 510 transitions. [2022-01-31 17:54:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-01-31 17:54:53,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:53,175 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:53,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:54:53,175 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:53,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1191558219, now seen corresponding path program 122 times [2022-01-31 17:54:53,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:53,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649910389] [2022-01-31 17:54:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:53,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:53,177 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:53,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:53,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:57,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:57,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649910389] [2022-01-31 17:54:57,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649910389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:57,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:57,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:54:57,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892308563] [2022-01-31 17:54:57,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:57,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:54:57,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:54:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:54:57,459 INFO L87 Difference]: Start difference. First operand 508 states and 510 transitions. Second operand has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:04,127 INFO L93 Difference]: Finished difference Result 771 states and 776 transitions. [2022-01-31 17:55:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:55:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 503 [2022-01-31 17:55:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:04,128 INFO L225 Difference]: With dead ends: 771 [2022-01-31 17:55:04,129 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 17:55:04,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:55:04,131 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 938 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:04,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 26 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:55:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 17:55:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2022-01-31 17:55:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 506 states have (on average 1.0059288537549407) internal successors, (509), 506 states have internal predecessors, (509), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 514 transitions. [2022-01-31 17:55:04,306 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 514 transitions. Word has length 503 [2022-01-31 17:55:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:04,306 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 514 transitions. [2022-01-31 17:55:04,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 514 transitions. [2022-01-31 17:55:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:55:04,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:04,309 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:04,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:55:04,309 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:04,309 INFO L85 PathProgramCache]: Analyzing trace with hash -564854585, now seen corresponding path program 123 times [2022-01-31 17:55:04,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:04,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786344121] [2022-01-31 17:55:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:04,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:04,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:04,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:04,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:08,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:08,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:08,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786344121] [2022-01-31 17:55:08,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786344121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:08,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:08,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:55:08,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484544760] [2022-01-31 17:55:08,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:08,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:55:08,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:55:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:55:08,708 INFO L87 Difference]: Start difference. First operand 512 states and 514 transitions. Second operand has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:15,519 INFO L93 Difference]: Finished difference Result 777 states and 782 transitions. [2022-01-31 17:55:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:55:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 17:55:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:15,520 INFO L225 Difference]: With dead ends: 777 [2022-01-31 17:55:15,520 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 17:55:15,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:55:15,522 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 918 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:15,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 66 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:55:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 17:55:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 516. [2022-01-31 17:55:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 510 states have (on average 1.0058823529411764) internal successors, (513), 510 states have internal predecessors, (513), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 518 transitions. [2022-01-31 17:55:15,701 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 518 transitions. Word has length 507 [2022-01-31 17:55:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:15,701 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 518 transitions. [2022-01-31 17:55:15,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 518 transitions. [2022-01-31 17:55:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-01-31 17:55:15,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:15,703 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:15,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:55:15,704 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1591306429, now seen corresponding path program 124 times [2022-01-31 17:55:15,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:15,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183356207] [2022-01-31 17:55:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:15,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:15,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:15,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:15,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:20,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:20,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:20,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183356207] [2022-01-31 17:55:20,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [183356207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:20,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:20,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:55:20,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929026461] [2022-01-31 17:55:20,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:20,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:55:20,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:55:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:55:20,139 INFO L87 Difference]: Start difference. First operand 516 states and 518 transitions. Second operand has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:27,057 INFO L93 Difference]: Finished difference Result 783 states and 788 transitions. [2022-01-31 17:55:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:55:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 511 [2022-01-31 17:55:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:27,058 INFO L225 Difference]: With dead ends: 783 [2022-01-31 17:55:27,058 INFO L226 Difference]: Without dead ends: 522 [2022-01-31 17:55:27,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:55:27,060 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 976 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:27,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 36 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:55:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-31 17:55:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 520. [2022-01-31 17:55:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.0058365758754864) internal successors, (517), 514 states have internal predecessors, (517), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 522 transitions. [2022-01-31 17:55:27,256 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 522 transitions. Word has length 511 [2022-01-31 17:55:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:27,256 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 522 transitions. [2022-01-31 17:55:27,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 522 transitions. [2022-01-31 17:55:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:55:27,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:27,258 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:27,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:55:27,258 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -913997889, now seen corresponding path program 125 times [2022-01-31 17:55:27,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:27,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731128848] [2022-01-31 17:55:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:27,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:27,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:27,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:27,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:31,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:31,764 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731128848] [2022-01-31 17:55:31,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [731128848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:31,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:31,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:55:31,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745443744] [2022-01-31 17:55:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:31,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:55:31,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:55:31,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:55:31,767 INFO L87 Difference]: Start difference. First operand 520 states and 522 transitions. Second operand has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:38,770 INFO L93 Difference]: Finished difference Result 789 states and 794 transitions. [2022-01-31 17:55:38,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:55:38,771 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 515 [2022-01-31 17:55:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:38,772 INFO L225 Difference]: With dead ends: 789 [2022-01-31 17:55:38,772 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 17:55:38,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:55:38,774 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 860 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:38,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 51 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:55:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 17:55:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 524. [2022-01-31 17:55:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 518 states have (on average 1.005791505791506) internal successors, (521), 518 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 526 transitions. [2022-01-31 17:55:38,976 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 526 transitions. Word has length 515 [2022-01-31 17:55:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:38,976 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 526 transitions. [2022-01-31 17:55:38,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 526 transitions. [2022-01-31 17:55:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-01-31 17:55:38,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:38,979 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:38,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:55:38,979 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1023624645, now seen corresponding path program 126 times [2022-01-31 17:55:38,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:38,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462418215] [2022-01-31 17:55:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:38,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:38,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:38,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:38,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:43,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:43,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:43,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462418215] [2022-01-31 17:55:43,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462418215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:43,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:43,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:55:43,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180148862] [2022-01-31 17:55:43,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:43,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:55:43,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:55:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:55:43,593 INFO L87 Difference]: Start difference. First operand 524 states and 526 transitions. Second operand has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:50,657 INFO L93 Difference]: Finished difference Result 795 states and 800 transitions. [2022-01-31 17:55:50,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:55:50,657 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-01-31 17:55:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:50,658 INFO L225 Difference]: With dead ends: 795 [2022-01-31 17:55:50,658 INFO L226 Difference]: Without dead ends: 530 [2022-01-31 17:55:50,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:55:50,661 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 932 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:50,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [933 Valid, 36 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:55:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-31 17:55:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 528. [2022-01-31 17:55:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0057471264367817) internal successors, (525), 522 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 530 transitions. [2022-01-31 17:55:50,875 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 530 transitions. Word has length 519 [2022-01-31 17:55:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:50,875 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 530 transitions. [2022-01-31 17:55:50,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 530 transitions. [2022-01-31 17:55:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 17:55:50,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:50,877 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:50,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:55:50,877 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1432926537, now seen corresponding path program 127 times [2022-01-31 17:55:50,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:50,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862604662] [2022-01-31 17:55:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:50,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:50,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:50,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:50,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:55,517 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:55,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862604662] [2022-01-31 17:55:55,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1862604662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:55,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:55,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:55:55,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453735131] [2022-01-31 17:55:55,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:55,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:55:55,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:55:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:55:55,521 INFO L87 Difference]: Start difference. First operand 528 states and 530 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:02,689 INFO L93 Difference]: Finished difference Result 801 states and 806 transitions. [2022-01-31 17:56:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:56:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 523 [2022-01-31 17:56:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:02,690 INFO L225 Difference]: With dead ends: 801 [2022-01-31 17:56:02,690 INFO L226 Difference]: Without dead ends: 534 [2022-01-31 17:56:02,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:56:02,692 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 945 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:02,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 41 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:56:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-31 17:56:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2022-01-31 17:56:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 526 states have (on average 1.005703422053232) internal successors, (529), 526 states have internal predecessors, (529), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2022-01-31 17:56:02,886 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 523 [2022-01-31 17:56:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:02,886 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2022-01-31 17:56:02,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2022-01-31 17:56:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-01-31 17:56:02,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:02,888 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:02,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:56:02,889 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash -824171213, now seen corresponding path program 128 times [2022-01-31 17:56:02,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336645610] [2022-01-31 17:56:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:02,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:02,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:02,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:02,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:07,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:07,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336645610] [2022-01-31 17:56:07,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336645610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:07,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:07,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:56:07,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124732892] [2022-01-31 17:56:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:07,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:56:07,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:56:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:56:07,610 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:14,882 INFO L93 Difference]: Finished difference Result 807 states and 812 transitions. [2022-01-31 17:56:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:56:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 527 [2022-01-31 17:56:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:14,883 INFO L225 Difference]: With dead ends: 807 [2022-01-31 17:56:14,883 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 17:56:14,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:56:14,885 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 881 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:14,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 46 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:56:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 17:56:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-01-31 17:56:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.0056603773584907) internal successors, (533), 530 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 538 transitions. [2022-01-31 17:56:15,093 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 538 transitions. Word has length 527 [2022-01-31 17:56:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:15,093 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 538 transitions. [2022-01-31 17:56:15,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 538 transitions. [2022-01-31 17:56:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:56:15,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:15,095 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:15,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:56:15,096 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash 803362223, now seen corresponding path program 129 times [2022-01-31 17:56:15,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:15,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019866356] [2022-01-31 17:56:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:15,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:15,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:15,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:15,112 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:19,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:19,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019866356] [2022-01-31 17:56:19,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019866356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:19,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:19,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:56:19,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425520719] [2022-01-31 17:56:19,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:19,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:56:19,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:56:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:56:19,855 INFO L87 Difference]: Start difference. First operand 536 states and 538 transitions. Second operand has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,276 INFO L93 Difference]: Finished difference Result 813 states and 818 transitions. [2022-01-31 17:56:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:56:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 17:56:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,277 INFO L225 Difference]: With dead ends: 813 [2022-01-31 17:56:27,277 INFO L226 Difference]: Without dead ends: 542 [2022-01-31 17:56:27,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:56:27,279 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 955 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 46 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:56:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-31 17:56:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-01-31 17:56:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.0056179775280898) internal successors, (537), 534 states have internal predecessors, (537), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 542 transitions. [2022-01-31 17:56:27,489 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 542 transitions. Word has length 531 [2022-01-31 17:56:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,489 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 542 transitions. [2022-01-31 17:56:27,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 542 transitions. [2022-01-31 17:56:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-01-31 17:56:27,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,491 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:56:27,491 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -14100437, now seen corresponding path program 130 times [2022-01-31 17:56:27,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681790373] [2022-01-31 17:56:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:27,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:27,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:32,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:32,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681790373] [2022-01-31 17:56:32,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681790373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:32,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:56:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196990820] [2022-01-31 17:56:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:32,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:56:32,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:56:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:56:32,324 INFO L87 Difference]: Start difference. First operand 540 states and 542 transitions. Second operand has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:39,888 INFO L93 Difference]: Finished difference Result 819 states and 824 transitions. [2022-01-31 17:56:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:56:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 535 [2022-01-31 17:56:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:39,889 INFO L225 Difference]: With dead ends: 819 [2022-01-31 17:56:39,889 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 17:56:39,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:56:39,891 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 976 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:39,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 56 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:56:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 17:56:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2022-01-31 17:56:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.0055762081784387) internal successors, (541), 538 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 546 transitions. [2022-01-31 17:56:40,112 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 546 transitions. Word has length 535 [2022-01-31 17:56:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:40,112 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 546 transitions. [2022-01-31 17:56:40,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 546 transitions. [2022-01-31 17:56:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-31 17:56:40,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:40,115 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:40,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:56:40,115 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash 532589735, now seen corresponding path program 131 times [2022-01-31 17:56:40,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:40,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226861786] [2022-01-31 17:56:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:40,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:40,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:40,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:40,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:45,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:45,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226861786] [2022-01-31 17:56:45,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [226861786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:45,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:45,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:56:45,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504256212] [2022-01-31 17:56:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:45,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:56:45,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:56:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:56:45,046 INFO L87 Difference]: Start difference. First operand 544 states and 546 transitions. Second operand has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:52,869 INFO L93 Difference]: Finished difference Result 825 states and 830 transitions. [2022-01-31 17:56:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:56:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 539 [2022-01-31 17:56:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:52,870 INFO L225 Difference]: With dead ends: 825 [2022-01-31 17:56:52,870 INFO L226 Difference]: Without dead ends: 550 [2022-01-31 17:56:52,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:56:52,872 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1011 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:52,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 36 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:56:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-31 17:56:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2022-01-31 17:56:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 542 states have (on average 1.0055350553505535) internal successors, (545), 542 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 550 transitions. [2022-01-31 17:56:53,089 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 550 transitions. Word has length 539 [2022-01-31 17:56:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:53,089 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 550 transitions. [2022-01-31 17:56:53,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 550 transitions. [2022-01-31 17:56:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-31 17:56:53,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:53,091 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:53,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:56:53,092 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1506880733, now seen corresponding path program 132 times [2022-01-31 17:56:53,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915796547] [2022-01-31 17:56:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:53,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:53,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:53,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:53,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:58,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:58,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915796547] [2022-01-31 17:56:58,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915796547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:58,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:58,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:56:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474965440] [2022-01-31 17:56:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:58,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:56:58,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:56:58,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:56:58,071 INFO L87 Difference]: Start difference. First operand 548 states and 550 transitions. Second operand has 136 states, 136 states have (on average 2.036764705882353) internal successors, (277), 135 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:05,916 INFO L93 Difference]: Finished difference Result 831 states and 836 transitions. [2022-01-31 17:57:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:57:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.036764705882353) internal successors, (277), 135 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 543 [2022-01-31 17:57:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:05,918 INFO L225 Difference]: With dead ends: 831 [2022-01-31 17:57:05,918 INFO L226 Difference]: Without dead ends: 554 [2022-01-31 17:57:05,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:57:05,920 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1024 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:05,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 41 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-31 17:57:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2022-01-31 17:57:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 546 states have (on average 1.0054945054945055) internal successors, (549), 546 states have internal predecessors, (549), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 554 transitions. [2022-01-31 17:57:06,161 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 554 transitions. Word has length 543 [2022-01-31 17:57:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:06,162 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 554 transitions. [2022-01-31 17:57:06,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.036764705882353) internal successors, (277), 135 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 554 transitions. [2022-01-31 17:57:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-01-31 17:57:06,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:06,164 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:06,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:57:06,164 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1485065119, now seen corresponding path program 133 times [2022-01-31 17:57:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159679218] [2022-01-31 17:57:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:06,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:06,165 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:06,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:06,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:11,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:11,303 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159679218] [2022-01-31 17:57:11,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159679218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:11,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:11,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:57:11,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052745804] [2022-01-31 17:57:11,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:11,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:57:11,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:57:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:57:11,307 INFO L87 Difference]: Start difference. First operand 552 states and 554 transitions. Second operand has 137 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 136 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:19,319 INFO L93 Difference]: Finished difference Result 837 states and 842 transitions. [2022-01-31 17:57:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:57:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 136 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 547 [2022-01-31 17:57:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:19,320 INFO L225 Difference]: With dead ends: 837 [2022-01-31 17:57:19,320 INFO L226 Difference]: Without dead ends: 558 [2022-01-31 17:57:19,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:57:19,323 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1216 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:19,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 36 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-31 17:57:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 556. [2022-01-31 17:57:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 550 states have (on average 1.0054545454545454) internal successors, (553), 550 states have internal predecessors, (553), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 558 transitions. [2022-01-31 17:57:19,530 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 558 transitions. Word has length 547 [2022-01-31 17:57:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:19,530 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 558 transitions. [2022-01-31 17:57:19,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 136 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 558 transitions. [2022-01-31 17:57:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 17:57:19,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:19,533 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:19,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:57:19,533 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash 776607259, now seen corresponding path program 134 times [2022-01-31 17:57:19,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569488269] [2022-01-31 17:57:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:19,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:19,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:19,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:19,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:24,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:24,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569488269] [2022-01-31 17:57:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [569488269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:24,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:24,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:57:24,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000817733] [2022-01-31 17:57:24,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:24,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:57:24,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:57:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:57:24,680 INFO L87 Difference]: Start difference. First operand 556 states and 558 transitions. Second operand has 138 states, 138 states have (on average 2.036231884057971) internal successors, (281), 137 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:32,829 INFO L93 Difference]: Finished difference Result 843 states and 848 transitions. [2022-01-31 17:57:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:57:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.036231884057971) internal successors, (281), 137 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 551 [2022-01-31 17:57:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:32,830 INFO L225 Difference]: With dead ends: 843 [2022-01-31 17:57:32,830 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 17:57:32,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:57:32,833 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1058 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:32,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 41 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 17:57:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 560. [2022-01-31 17:57:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 554 states have (on average 1.0054151624548737) internal successors, (557), 554 states have internal predecessors, (557), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 562 transitions. [2022-01-31 17:57:33,059 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 562 transitions. Word has length 551 [2022-01-31 17:57:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:33,060 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 562 transitions. [2022-01-31 17:57:33,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.036231884057971) internal successors, (281), 137 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 562 transitions. [2022-01-31 17:57:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:57:33,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:33,062 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:33,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:57:33,062 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -796183913, now seen corresponding path program 135 times [2022-01-31 17:57:33,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:33,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752908530] [2022-01-31 17:57:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:33,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:33,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:33,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:33,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:38,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:38,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752908530] [2022-01-31 17:57:38,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [752908530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:38,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:38,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:57:38,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355623866] [2022-01-31 17:57:38,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:38,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:57:38,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:57:38,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:57:38,287 INFO L87 Difference]: Start difference. First operand 560 states and 562 transitions. Second operand has 139 states, 139 states have (on average 2.035971223021583) internal successors, (283), 138 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:46,448 INFO L93 Difference]: Finished difference Result 849 states and 854 transitions. [2022-01-31 17:57:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:57:46,448 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.035971223021583) internal successors, (283), 138 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:57:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:46,449 INFO L225 Difference]: With dead ends: 849 [2022-01-31 17:57:46,449 INFO L226 Difference]: Without dead ends: 566 [2022-01-31 17:57:46,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:57:46,452 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 971 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 823 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:46,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 56 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [823 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:57:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-31 17:57:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 564. [2022-01-31 17:57:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 558 states have (on average 1.0053763440860215) internal successors, (561), 558 states have internal predecessors, (561), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 566 transitions. [2022-01-31 17:57:46,684 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 566 transitions. Word has length 555 [2022-01-31 17:57:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:46,684 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 566 transitions. [2022-01-31 17:57:46,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.035971223021583) internal successors, (283), 138 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 566 transitions. [2022-01-31 17:57:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-01-31 17:57:46,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:46,686 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:46,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:57:46,687 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 433234195, now seen corresponding path program 136 times [2022-01-31 17:57:46,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:46,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402433241] [2022-01-31 17:57:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:46,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:46,688 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:46,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:46,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:51,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:51,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:51,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402433241] [2022-01-31 17:57:51,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [402433241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:51,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:51,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:57:51,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169396875] [2022-01-31 17:57:51,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:51,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:57:51,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:57:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:57:51,973 INFO L87 Difference]: Start difference. First operand 564 states and 566 transitions. Second operand has 140 states, 140 states have (on average 2.0357142857142856) internal successors, (285), 139 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:00,362 INFO L93 Difference]: Finished difference Result 855 states and 860 transitions. [2022-01-31 17:58:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:58:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0357142857142856) internal successors, (285), 139 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 559 [2022-01-31 17:58:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:00,364 INFO L225 Difference]: With dead ends: 855 [2022-01-31 17:58:00,364 INFO L226 Difference]: Without dead ends: 570 [2022-01-31 17:58:00,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:58:00,366 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 980 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:00,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 56 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-31 17:58:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 568. [2022-01-31 17:58:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.0053380782918149) internal successors, (565), 562 states have internal predecessors, (565), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 570 transitions. [2022-01-31 17:58:00,598 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 570 transitions. Word has length 559 [2022-01-31 17:58:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:00,599 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 570 transitions. [2022-01-31 17:58:00,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0357142857142856) internal successors, (285), 139 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 570 transitions. [2022-01-31 17:58:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-01-31 17:58:00,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:00,601 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:00,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:58:00,601 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1775541873, now seen corresponding path program 137 times [2022-01-31 17:58:00,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:00,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296062018] [2022-01-31 17:58:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:00,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:00,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:00,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:00,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:06,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:06,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296062018] [2022-01-31 17:58:06,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [296062018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:06,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:06,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:58:06,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854622666] [2022-01-31 17:58:06,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:06,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:58:06,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:58:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:58:06,019 INFO L87 Difference]: Start difference. First operand 568 states and 570 transitions. Second operand has 141 states, 141 states have (on average 2.0354609929078014) internal successors, (287), 140 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:14,688 INFO L93 Difference]: Finished difference Result 861 states and 866 transitions. [2022-01-31 17:58:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:58:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0354609929078014) internal successors, (287), 140 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 563 [2022-01-31 17:58:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:14,689 INFO L225 Difference]: With dead ends: 861 [2022-01-31 17:58:14,689 INFO L226 Difference]: Without dead ends: 574 [2022-01-31 17:58:14,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:58:14,692 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1019 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:14,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 56 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-31 17:58:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 572. [2022-01-31 17:58:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 566 states have (on average 1.0053003533568905) internal successors, (569), 566 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 574 transitions. [2022-01-31 17:58:14,928 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 574 transitions. Word has length 563 [2022-01-31 17:58:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 574 transitions. [2022-01-31 17:58:14,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.0354609929078014) internal successors, (287), 140 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 574 transitions. [2022-01-31 17:58:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-01-31 17:58:14,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:14,931 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:14,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:58:14,931 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash 52458507, now seen corresponding path program 138 times [2022-01-31 17:58:14,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:14,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388897938] [2022-01-31 17:58:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:14,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:14,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:14,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:14,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:20,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388897938] [2022-01-31 17:58:20,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388897938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:20,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:20,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:58:20,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187312114] [2022-01-31 17:58:20,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:20,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:58:20,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:20,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:58:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:58:20,385 INFO L87 Difference]: Start difference. First operand 572 states and 574 transitions. Second operand has 142 states, 142 states have (on average 2.035211267605634) internal successors, (289), 141 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:29,136 INFO L93 Difference]: Finished difference Result 867 states and 872 transitions. [2022-01-31 17:58:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:58:29,136 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.035211267605634) internal successors, (289), 141 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 567 [2022-01-31 17:58:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:29,137 INFO L225 Difference]: With dead ends: 867 [2022-01-31 17:58:29,137 INFO L226 Difference]: Without dead ends: 578 [2022-01-31 17:58:29,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:58:29,140 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1121 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:29,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 36 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:58:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-31 17:58:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 576. [2022-01-31 17:58:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.0052631578947369) internal successors, (573), 570 states have internal predecessors, (573), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 578 transitions. [2022-01-31 17:58:29,379 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 578 transitions. Word has length 567 [2022-01-31 17:58:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:29,379 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 578 transitions. [2022-01-31 17:58:29,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.035211267605634) internal successors, (289), 141 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 578 transitions. [2022-01-31 17:58:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-01-31 17:58:29,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:29,382 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:29,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:58:29,382 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash -809707385, now seen corresponding path program 139 times [2022-01-31 17:58:29,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:29,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963145451] [2022-01-31 17:58:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:29,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:29,383 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:29,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:29,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:34,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963145451] [2022-01-31 17:58:34,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1963145451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:34,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:34,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 17:58:34,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362724038] [2022-01-31 17:58:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:34,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 17:58:34,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 17:58:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:58:34,925 INFO L87 Difference]: Start difference. First operand 576 states and 578 transitions. Second operand has 143 states, 143 states have (on average 2.034965034965035) internal successors, (291), 142 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)