/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/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:14:09,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:14:09,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:14:09,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:14:09,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:14:09,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:14:09,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:14:09,289 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 22:14:09,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:14:09,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:14:09,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:14:09,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:14:09,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:14:09,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:14:09,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:14:09,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:14:09,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:14:09,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:14:09,302 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:14:09,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:14:09,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:14:09,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:14:09,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:14:09,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:14:09,493 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:14:09,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-01-31 22:14:09,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ad6b738/82ad3b506341487ab8f7a79a8705873a/FLAGdff1b9e91 [2022-01-31 22:14:09,956 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:14:09,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-01-31 22:14:09,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ad6b738/82ad3b506341487ab8f7a79a8705873a/FLAGdff1b9e91 [2022-01-31 22:14:09,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71ad6b738/82ad3b506341487ab8f7a79a8705873a [2022-01-31 22:14:09,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:14:09,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:14:09,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:14:09,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:14:09,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:14:09,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:14:09" (1/1) ... [2022-01-31 22:14:09,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ac80e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:09, skipping insertion in model container [2022-01-31 22:14:09,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:14:09" (1/1) ... [2022-01-31 22:14:09,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:14:10,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:14:10,165 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c[4591,4604] [2022-01-31 22:14:10,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:14:10,176 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:14:10,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c[4591,4604] [2022-01-31 22:14:10,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:14:10,230 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:14:10,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10 WrapperNode [2022-01-31 22:14:10,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:14:10,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:14:10,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:14:10,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:14:10,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:14:10,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:14:10,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:14:10,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:14:10,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (1/1) ... [2022-01-31 22:14:10,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:14:10,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:14:10,301 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 22:14:10,303 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 22:14:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:14:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:14:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:14:10,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:14:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:14:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:14:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:14:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:14:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 22:14:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:14:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:14:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:14:10,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:14:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:14:10,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:14:10,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:14:10,405 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:14:10,410 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:14:10,617 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:14:10,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:14:10,621 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 22:14:10,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:14:10 BoogieIcfgContainer [2022-01-31 22:14:10,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:14:10,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:14:10,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:14:10,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:14:10,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:14:09" (1/3) ... [2022-01-31 22:14:10,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb1f9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:14:10, skipping insertion in model container [2022-01-31 22:14:10,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:14:10" (2/3) ... [2022-01-31 22:14:10,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb1f9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:14:10, skipping insertion in model container [2022-01-31 22:14:10,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:14:10" (3/3) ... [2022-01-31 22:14:10,629 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2022-01-31 22:14:10,632 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:14:10,632 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:14:10,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:14:10,670 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 22:14:10,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:14:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 22:14:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 22:14:10,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:10,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:10,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:10,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:10,688 INFO L85 PathProgramCache]: Analyzing trace with hash 88534809, now seen corresponding path program 1 times [2022-01-31 22:14:10,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:10,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083635616] [2022-01-31 22:14:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:10,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:10,735 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:10,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:10,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083635616] [2022-01-31 22:14:10,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083635616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:10,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:10,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:10,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357636251] [2022-01-31 22:14:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:10,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:10,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:10,911 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,081 INFO L93 Difference]: Finished difference Result 100 states and 175 transitions. [2022-01-31 22:14:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,091 INFO L225 Difference]: With dead ends: 100 [2022-01-31 22:14:11,091 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 22:14:11,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,095 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 22:14:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-01-31 22:14:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-01-31 22:14:11,134 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-01-31 22:14:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,135 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-01-31 22:14:11,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-01-31 22:14:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 22:14:11,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:14:11,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1191328869, now seen corresponding path program 1 times [2022-01-31 22:14:11,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074990840] [2022-01-31 22:14:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,143 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:11,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074990840] [2022-01-31 22:14:11,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1074990840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829085346] [2022-01-31 22:14:11,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,195 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,274 INFO L93 Difference]: Finished difference Result 138 states and 253 transitions. [2022-01-31 22:14:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,276 INFO L225 Difference]: With dead ends: 138 [2022-01-31 22:14:11,276 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 22:14:11,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,277 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 22:14:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-01-31 22:14:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-01-31 22:14:11,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-01-31 22:14:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,287 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-01-31 22:14:11,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-01-31 22:14:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 22:14:11,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:14:11,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1550175482, now seen corresponding path program 1 times [2022-01-31 22:14:11,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849589562] [2022-01-31 22:14:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,290 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,322 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 22:14:11,322 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849589562] [2022-01-31 22:14:11,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1849589562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203683797] [2022-01-31 22:14:11,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,324 INFO L87 Difference]: Start difference. First operand 83 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,404 INFO L93 Difference]: Finished difference Result 127 states and 226 transitions. [2022-01-31 22:14:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 22:14:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,405 INFO L225 Difference]: With dead ends: 127 [2022-01-31 22:14:11,405 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 22:14:11,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,406 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 22:14:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-01-31 22:14:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-01-31 22:14:11,415 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-01-31 22:14:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,415 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-01-31 22:14:11,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-01-31 22:14:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 22:14:11,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 22:14:11,416 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1723723460, now seen corresponding path program 1 times [2022-01-31 22:14:11,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014012600] [2022-01-31 22:14:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:11,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014012600] [2022-01-31 22:14:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014012600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864746108] [2022-01-31 22:14:11,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,449 INFO L87 Difference]: Start difference. First operand 86 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,525 INFO L93 Difference]: Finished difference Result 238 states and 432 transitions. [2022-01-31 22:14:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 22:14:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,527 INFO L225 Difference]: With dead ends: 238 [2022-01-31 22:14:11,527 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 22:14:11,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,528 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 91 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 22:14:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-01-31 22:14:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8193548387096774) internal successors, (282), 155 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 285 transitions. [2022-01-31 22:14:11,541 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 285 transitions. Word has length 24 [2022-01-31 22:14:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,542 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 285 transitions. [2022-01-31 22:14:11,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 285 transitions. [2022-01-31 22:14:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 22:14:11,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 22:14:11,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1291380158, now seen corresponding path program 1 times [2022-01-31 22:14:11,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408665909] [2022-01-31 22:14:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:11,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408665909] [2022-01-31 22:14:11,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408665909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307131015] [2022-01-31 22:14:11,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,572 INFO L87 Difference]: Start difference. First operand 159 states and 285 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,651 INFO L93 Difference]: Finished difference Result 207 states and 371 transitions. [2022-01-31 22:14:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 22:14:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,653 INFO L225 Difference]: With dead ends: 207 [2022-01-31 22:14:11,653 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 22:14:11,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,654 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 22:14:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2022-01-31 22:14:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-01-31 22:14:11,677 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-01-31 22:14:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,677 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-01-31 22:14:11,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-01-31 22:14:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:14:11,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 22:14:11,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1896032784, now seen corresponding path program 1 times [2022-01-31 22:14:11,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166124561] [2022-01-31 22:14:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:11,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166124561] [2022-01-31 22:14:11,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [166124561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678563148] [2022-01-31 22:14:11,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,706 INFO L87 Difference]: Start difference. First operand 159 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,792 INFO L93 Difference]: Finished difference Result 299 states and 539 transitions. [2022-01-31 22:14:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 22:14:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,794 INFO L225 Difference]: With dead ends: 299 [2022-01-31 22:14:11,794 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 22:14:11,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,796 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 22:14:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 215. [2022-01-31 22:14:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.7914691943127963) internal successors, (378), 211 states have internal predecessors, (378), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 381 transitions. [2022-01-31 22:14:11,822 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 381 transitions. Word has length 25 [2022-01-31 22:14:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,823 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 381 transitions. [2022-01-31 22:14:11,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 381 transitions. [2022-01-31 22:14:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:14:11,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 22:14:11,828 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash 616169106, now seen corresponding path program 1 times [2022-01-31 22:14:11,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833140562] [2022-01-31 22:14:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:11,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833140562] [2022-01-31 22:14:11,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833140562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656888057] [2022-01-31 22:14:11,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,860 INFO L87 Difference]: Start difference. First operand 215 states and 381 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:11,941 INFO L93 Difference]: Finished difference Result 511 states and 915 transitions. [2022-01-31 22:14:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 22:14:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:11,943 INFO L225 Difference]: With dead ends: 511 [2022-01-31 22:14:11,943 INFO L226 Difference]: Without dead ends: 305 [2022-01-31 22:14:11,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:11,944 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-31 22:14:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2022-01-31 22:14:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 299 states have (on average 1.7792642140468227) internal successors, (532), 299 states have internal predecessors, (532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 535 transitions. [2022-01-31 22:14:11,965 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 535 transitions. Word has length 25 [2022-01-31 22:14:11,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:11,965 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 535 transitions. [2022-01-31 22:14:11,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 535 transitions. [2022-01-31 22:14:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 22:14:11,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:11,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 22:14:11,966 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1352312423, now seen corresponding path program 1 times [2022-01-31 22:14:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734736830] [2022-01-31 22:14:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:11,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:11,968 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:11,989 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:11,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734736830] [2022-01-31 22:14:11,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [734736830] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:11,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:11,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:11,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043883116] [2022-01-31 22:14:11,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:11,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:11,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:11,990 INFO L87 Difference]: Start difference. First operand 303 states and 535 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:12,070 INFO L93 Difference]: Finished difference Result 457 states and 805 transitions. [2022-01-31 22:14:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 22:14:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:12,072 INFO L225 Difference]: With dead ends: 457 [2022-01-31 22:14:12,072 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 22:14:12,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:12,073 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:12,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 22:14:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-01-31 22:14:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7573770491803278) internal successors, (536), 305 states have internal predecessors, (536), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 539 transitions. [2022-01-31 22:14:12,094 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 539 transitions. Word has length 26 [2022-01-31 22:14:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:12,094 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 539 transitions. [2022-01-31 22:14:12,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 539 transitions. [2022-01-31 22:14:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 22:14:12,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:12,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:12,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 22:14:12,095 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:12,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1921586519, now seen corresponding path program 1 times [2022-01-31 22:14:12,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:12,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556506977] [2022-01-31 22:14:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:12,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:12,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:12,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556506977] [2022-01-31 22:14:12,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [556506977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:12,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:12,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:12,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046472545] [2022-01-31 22:14:12,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:12,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:12,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:12,132 INFO L87 Difference]: Start difference. First operand 309 states and 539 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:12,234 INFO L93 Difference]: Finished difference Result 573 states and 1013 transitions. [2022-01-31 22:14:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 22:14:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:12,236 INFO L225 Difference]: With dead ends: 573 [2022-01-31 22:14:12,236 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 22:14:12,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:12,238 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:12,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 22:14:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-01-31 22:14:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.7292161520190024) internal successors, (728), 421 states have internal predecessors, (728), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 731 transitions. [2022-01-31 22:14:12,266 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 731 transitions. Word has length 26 [2022-01-31 22:14:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:12,267 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 731 transitions. [2022-01-31 22:14:12,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 731 transitions. [2022-01-31 22:14:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 22:14:12,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:12,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:12,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 22:14:12,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 641722841, now seen corresponding path program 1 times [2022-01-31 22:14:12,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:12,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269458309] [2022-01-31 22:14:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:12,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:12,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:12,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:12,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269458309] [2022-01-31 22:14:12,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [269458309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:12,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:12,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:12,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787171747] [2022-01-31 22:14:12,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:12,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:12,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:12,316 INFO L87 Difference]: Start difference. First operand 425 states and 731 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:12,414 INFO L93 Difference]: Finished difference Result 1005 states and 1741 transitions. [2022-01-31 22:14:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 22:14:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:12,417 INFO L225 Difference]: With dead ends: 1005 [2022-01-31 22:14:12,417 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 22:14:12,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:12,418 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:12,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 22:14:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-01-31 22:14:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.7181663837011885) internal successors, (1012), 589 states have internal predecessors, (1012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1015 transitions. [2022-01-31 22:14:12,454 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1015 transitions. Word has length 26 [2022-01-31 22:14:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:12,454 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1015 transitions. [2022-01-31 22:14:12,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1015 transitions. [2022-01-31 22:14:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 22:14:12,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:12,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:12,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 22:14:12,457 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash -560146297, now seen corresponding path program 1 times [2022-01-31 22:14:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:12,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788344060] [2022-01-31 22:14:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:12,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:12,459 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:12,488 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:12,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788344060] [2022-01-31 22:14:12,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788344060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:12,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:12,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:12,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469193920] [2022-01-31 22:14:12,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:12,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:12,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:12,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:12,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:12,489 INFO L87 Difference]: Start difference. First operand 593 states and 1015 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:12,588 INFO L93 Difference]: Finished difference Result 889 states and 1517 transitions. [2022-01-31 22:14:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:12,590 INFO L225 Difference]: With dead ends: 889 [2022-01-31 22:14:12,590 INFO L226 Difference]: Without dead ends: 603 [2022-01-31 22:14:12,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:12,591 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:12,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-31 22:14:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-01-31 22:14:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.695142378559464) internal successors, (1012), 597 states have internal predecessors, (1012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1015 transitions. [2022-01-31 22:14:12,624 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1015 transitions. Word has length 27 [2022-01-31 22:14:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:12,624 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1015 transitions. [2022-01-31 22:14:12,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1015 transitions. [2022-01-31 22:14:12,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 22:14:12,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:12,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:12,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 22:14:12,626 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1581214651, now seen corresponding path program 1 times [2022-01-31 22:14:12,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:12,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45394730] [2022-01-31 22:14:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:12,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:12,627 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:12,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45394730] [2022-01-31 22:14:12,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [45394730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:12,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:12,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:12,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883092381] [2022-01-31 22:14:12,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:12,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:12,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:12,645 INFO L87 Difference]: Start difference. First operand 601 states and 1015 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:12,768 INFO L93 Difference]: Finished difference Result 1101 states and 1889 transitions. [2022-01-31 22:14:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:12,772 INFO L225 Difference]: With dead ends: 1101 [2022-01-31 22:14:12,772 INFO L226 Difference]: Without dead ends: 1099 [2022-01-31 22:14:12,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:12,772 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:12,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-31 22:14:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-01-31 22:14:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6583034647550776) internal successors, (1388), 837 states have internal predecessors, (1388), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1391 transitions. [2022-01-31 22:14:12,829 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1391 transitions. Word has length 27 [2022-01-31 22:14:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:12,830 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1391 transitions. [2022-01-31 22:14:12,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1391 transitions. [2022-01-31 22:14:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 22:14:12,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:12,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:12,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 22:14:12,831 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1433888967, now seen corresponding path program 1 times [2022-01-31 22:14:12,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:12,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208797658] [2022-01-31 22:14:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:12,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:12,833 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:12,849 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208797658] [2022-01-31 22:14:12,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [208797658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:12,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:12,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:12,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785926302] [2022-01-31 22:14:12,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:12,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:12,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:12,850 INFO L87 Difference]: Start difference. First operand 841 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:12,973 INFO L93 Difference]: Finished difference Result 1981 states and 3297 transitions. [2022-01-31 22:14:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:12,977 INFO L225 Difference]: With dead ends: 1981 [2022-01-31 22:14:12,977 INFO L226 Difference]: Without dead ends: 1163 [2022-01-31 22:14:12,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:12,979 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:12,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-01-31 22:14:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-01-31 22:14:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6490924805531546) internal successors, (1908), 1157 states have internal predecessors, (1908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1911 transitions. [2022-01-31 22:14:13,059 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1911 transitions. Word has length 27 [2022-01-31 22:14:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:13,060 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1911 transitions. [2022-01-31 22:14:13,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1911 transitions. [2022-01-31 22:14:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 22:14:13,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:13,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:13,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 22:14:13,062 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1772799826, now seen corresponding path program 1 times [2022-01-31 22:14:13,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378687947] [2022-01-31 22:14:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:13,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:13,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:13,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:13,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:13,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378687947] [2022-01-31 22:14:13,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378687947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:13,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:13,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:13,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800639313] [2022-01-31 22:14:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:13,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:13,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:13,098 INFO L87 Difference]: Start difference. First operand 1161 states and 1911 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:13,219 INFO L93 Difference]: Finished difference Result 1741 states and 2857 transitions. [2022-01-31 22:14:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 22:14:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:13,222 INFO L225 Difference]: With dead ends: 1741 [2022-01-31 22:14:13,222 INFO L226 Difference]: Without dead ends: 1179 [2022-01-31 22:14:13,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:13,224 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:13,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-01-31 22:14:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-01-31 22:14:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.6265984654731458) internal successors, (1908), 1173 states have internal predecessors, (1908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1911 transitions. [2022-01-31 22:14:13,311 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1911 transitions. Word has length 28 [2022-01-31 22:14:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:13,311 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1911 transitions. [2022-01-31 22:14:13,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1911 transitions. [2022-01-31 22:14:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 22:14:13,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:13,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:13,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 22:14:13,313 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1501099116, now seen corresponding path program 1 times [2022-01-31 22:14:13,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880404078] [2022-01-31 22:14:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:13,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:13,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:13,336 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880404078] [2022-01-31 22:14:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880404078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:13,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:13,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:13,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721355189] [2022-01-31 22:14:13,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:13,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:13,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:13,337 INFO L87 Difference]: Start difference. First operand 1177 states and 1911 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:13,518 INFO L93 Difference]: Finished difference Result 2125 states and 3513 transitions. [2022-01-31 22:14:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 22:14:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:13,524 INFO L225 Difference]: With dead ends: 2125 [2022-01-31 22:14:13,524 INFO L226 Difference]: Without dead ends: 2123 [2022-01-31 22:14:13,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:13,526 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:13,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-01-31 22:14:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-01-31 22:14:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.5841821449970042) internal successors, (2644), 1669 states have internal predecessors, (2644), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2647 transitions. [2022-01-31 22:14:13,635 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2647 transitions. Word has length 28 [2022-01-31 22:14:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:13,635 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2647 transitions. [2022-01-31 22:14:13,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2647 transitions. [2022-01-31 22:14:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 22:14:13,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:13,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:13,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 22:14:13,637 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 221235438, now seen corresponding path program 1 times [2022-01-31 22:14:13,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:13,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222906196] [2022-01-31 22:14:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:13,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:13,638 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:13,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:13,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:13,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222906196] [2022-01-31 22:14:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [222906196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:13,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:13,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:13,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292984764] [2022-01-31 22:14:13,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:13,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:13,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:13,655 INFO L87 Difference]: Start difference. First operand 1673 states and 2647 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:13,867 INFO L93 Difference]: Finished difference Result 3917 states and 6233 transitions. [2022-01-31 22:14:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 22:14:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:13,873 INFO L225 Difference]: With dead ends: 3917 [2022-01-31 22:14:13,873 INFO L226 Difference]: Without dead ends: 2283 [2022-01-31 22:14:13,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:13,876 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:13,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-01-31 22:14:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-01-31 22:14:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5757575757575757) internal successors, (3588), 2277 states have internal predecessors, (3588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3591 transitions. [2022-01-31 22:14:14,030 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3591 transitions. Word has length 28 [2022-01-31 22:14:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:14,031 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3591 transitions. [2022-01-31 22:14:14,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3591 transitions. [2022-01-31 22:14:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:14:14,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:14,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:14,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 22:14:14,033 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:14,033 INFO L85 PathProgramCache]: Analyzing trace with hash -710353220, now seen corresponding path program 1 times [2022-01-31 22:14:14,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:14,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334974585] [2022-01-31 22:14:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:14,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:14,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:14,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:14,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:14,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334974585] [2022-01-31 22:14:14,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334974585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:14,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:14,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:14,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384959180] [2022-01-31 22:14:14,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:14,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:14,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:14,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:14,051 INFO L87 Difference]: Start difference. First operand 2281 states and 3591 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:14,250 INFO L93 Difference]: Finished difference Result 3421 states and 5369 transitions. [2022-01-31 22:14:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 22:14:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:14,256 INFO L225 Difference]: With dead ends: 3421 [2022-01-31 22:14:14,256 INFO L226 Difference]: Without dead ends: 2315 [2022-01-31 22:14:14,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:14,258 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:14,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-01-31 22:14:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-01-31 22:14:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5539194456474665) internal successors, (3588), 2309 states have internal predecessors, (3588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3591 transitions. [2022-01-31 22:14:14,413 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3591 transitions. Word has length 29 [2022-01-31 22:14:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:14,413 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3591 transitions. [2022-01-31 22:14:14,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3591 transitions. [2022-01-31 22:14:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:14:14,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:14,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:14,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 22:14:14,415 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1731421574, now seen corresponding path program 1 times [2022-01-31 22:14:14,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:14,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68368994] [2022-01-31 22:14:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:14,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:14,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:14,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68368994] [2022-01-31 22:14:14,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [68368994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:14,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:14,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:14,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300312223] [2022-01-31 22:14:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:14,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:14,434 INFO L87 Difference]: Start difference. First operand 2313 states and 3591 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:14,794 INFO L93 Difference]: Finished difference Result 4109 states and 6505 transitions. [2022-01-31 22:14:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 22:14:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:14,806 INFO L225 Difference]: With dead ends: 4109 [2022-01-31 22:14:14,806 INFO L226 Difference]: Without dead ends: 4107 [2022-01-31 22:14:14,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:14,807 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:14,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:14,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-01-31 22:14:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-01-31 22:14:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.5085508550855085) internal successors, (5028), 3333 states have internal predecessors, (5028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 5031 transitions. [2022-01-31 22:14:15,070 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 5031 transitions. Word has length 29 [2022-01-31 22:14:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 5031 transitions. [2022-01-31 22:14:15,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 5031 transitions. [2022-01-31 22:14:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 22:14:15,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:15,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:15,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 22:14:15,074 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1283682044, now seen corresponding path program 1 times [2022-01-31 22:14:15,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:15,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669003141] [2022-01-31 22:14:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:15,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:15,075 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:15,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:15,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669003141] [2022-01-31 22:14:15,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669003141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:15,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:15,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:15,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164336345] [2022-01-31 22:14:15,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:15,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:15,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:15,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:15,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:15,099 INFO L87 Difference]: Start difference. First operand 3337 states and 5031 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:15,534 INFO L93 Difference]: Finished difference Result 7757 states and 11753 transitions. [2022-01-31 22:14:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 22:14:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:15,552 INFO L225 Difference]: With dead ends: 7757 [2022-01-31 22:14:15,552 INFO L226 Difference]: Without dead ends: 4491 [2022-01-31 22:14:15,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:15,587 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:15,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-01-31 22:14:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-01-31 22:14:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.4992196209587514) internal successors, (6724), 4485 states have internal predecessors, (6724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6727 transitions. [2022-01-31 22:14:15,973 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6727 transitions. Word has length 29 [2022-01-31 22:14:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:15,974 INFO L470 AbstractCegarLoop]: Abstraction has 4489 states and 6727 transitions. [2022-01-31 22:14:15,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6727 transitions. [2022-01-31 22:14:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 22:14:15,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:15,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:15,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 22:14:15,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2134246461, now seen corresponding path program 1 times [2022-01-31 22:14:15,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:15,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587677865] [2022-01-31 22:14:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:15,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:15,981 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:16,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:16,014 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587677865] [2022-01-31 22:14:16,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587677865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:16,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:16,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:16,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027495763] [2022-01-31 22:14:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:16,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:16,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:16,015 INFO L87 Difference]: Start difference. First operand 4489 states and 6727 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:16,449 INFO L93 Difference]: Finished difference Result 6733 states and 10057 transitions. [2022-01-31 22:14:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 22:14:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:16,473 INFO L225 Difference]: With dead ends: 6733 [2022-01-31 22:14:16,473 INFO L226 Difference]: Without dead ends: 4555 [2022-01-31 22:14:16,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:16,490 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:16,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-01-31 22:14:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-01-31 22:14:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.478127060892504) internal successors, (6724), 4549 states have internal predecessors, (6724), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6727 transitions. [2022-01-31 22:14:16,874 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6727 transitions. Word has length 30 [2022-01-31 22:14:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:16,874 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6727 transitions. [2022-01-31 22:14:16,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6727 transitions. [2022-01-31 22:14:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 22:14:16,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:16,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:16,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 22:14:16,878 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:16,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:16,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1139652481, now seen corresponding path program 1 times [2022-01-31 22:14:16,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:16,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031478132] [2022-01-31 22:14:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:16,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:16,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:16,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:16,894 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 22:14:16,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:16,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031478132] [2022-01-31 22:14:16,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031478132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:16,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:16,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:16,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227947290] [2022-01-31 22:14:16,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:16,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:16,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:16,896 INFO L87 Difference]: Start difference. First operand 4553 states and 6727 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:17,476 INFO L93 Difference]: Finished difference Result 7949 states and 11977 transitions. [2022-01-31 22:14:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:17,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 22:14:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:17,488 INFO L225 Difference]: With dead ends: 7949 [2022-01-31 22:14:17,488 INFO L226 Difference]: Without dead ends: 7947 [2022-01-31 22:14:17,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:17,490 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:17,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-01-31 22:14:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-01-31 22:14:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4322173847770605) internal successors, (9540), 6661 states have internal predecessors, (9540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9543 transitions. [2022-01-31 22:14:18,089 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9543 transitions. Word has length 30 [2022-01-31 22:14:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:18,089 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 9543 transitions. [2022-01-31 22:14:18,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9543 transitions. [2022-01-31 22:14:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 22:14:18,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:18,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:18,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 22:14:18,097 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash -140211197, now seen corresponding path program 1 times [2022-01-31 22:14:18,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:18,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906451282] [2022-01-31 22:14:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:18,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:18,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:18,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:18,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906451282] [2022-01-31 22:14:18,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906451282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:18,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:18,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:18,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107922023] [2022-01-31 22:14:18,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:18,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:18,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:18,129 INFO L87 Difference]: Start difference. First operand 6665 states and 9543 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:18,907 INFO L93 Difference]: Finished difference Result 15373 states and 22089 transitions. [2022-01-31 22:14:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 22:14:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:18,922 INFO L225 Difference]: With dead ends: 15373 [2022-01-31 22:14:18,922 INFO L226 Difference]: Without dead ends: 8843 [2022-01-31 22:14:18,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:18,935 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:18,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-01-31 22:14:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-01-31 22:14:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.419938893289578) internal successors, (12548), 8837 states have internal predecessors, (12548), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12551 transitions. [2022-01-31 22:14:19,647 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12551 transitions. Word has length 30 [2022-01-31 22:14:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:19,647 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 12551 transitions. [2022-01-31 22:14:19,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12551 transitions. [2022-01-31 22:14:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:14:19,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:19,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:19,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 22:14:19,674 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash 969703665, now seen corresponding path program 1 times [2022-01-31 22:14:19,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793572904] [2022-01-31 22:14:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:19,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:19,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:19,700 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:19,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793572904] [2022-01-31 22:14:19,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [793572904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:19,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:19,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:19,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091546995] [2022-01-31 22:14:19,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:19,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:19,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:19,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:19,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:19,701 INFO L87 Difference]: Start difference. First operand 8841 states and 12551 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:20,411 INFO L93 Difference]: Finished difference Result 13261 states and 18761 transitions. [2022-01-31 22:14:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:20,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:20,452 INFO L225 Difference]: With dead ends: 13261 [2022-01-31 22:14:20,452 INFO L226 Difference]: Without dead ends: 8971 [2022-01-31 22:14:20,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:20,478 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:20,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-01-31 22:14:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-01-31 22:14:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.399665365309537) internal successors, (12548), 8965 states have internal predecessors, (12548), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12551 transitions. [2022-01-31 22:14:21,303 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12551 transitions. Word has length 31 [2022-01-31 22:14:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:21,303 INFO L470 AbstractCegarLoop]: Abstraction has 8969 states and 12551 transitions. [2022-01-31 22:14:21,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12551 transitions. [2022-01-31 22:14:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:14:21,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:21,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:21,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 22:14:21,309 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:21,309 INFO L85 PathProgramCache]: Analyzing trace with hash -51364689, now seen corresponding path program 1 times [2022-01-31 22:14:21,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:21,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253520815] [2022-01-31 22:14:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:21,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:21,311 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:21,332 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253520815] [2022-01-31 22:14:21,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [253520815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:21,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:21,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:21,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012964455] [2022-01-31 22:14:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:21,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:21,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:21,334 INFO L87 Difference]: Start difference. First operand 8969 states and 12551 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:22,765 INFO L93 Difference]: Finished difference Result 15373 states and 21897 transitions. [2022-01-31 22:14:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:22,785 INFO L225 Difference]: With dead ends: 15373 [2022-01-31 22:14:22,785 INFO L226 Difference]: Without dead ends: 15371 [2022-01-31 22:14:22,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:22,790 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:22,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-01-31 22:14:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-01-31 22:14:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.355560561688068) internal successors, (18052), 13317 states have internal predecessors, (18052), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 18055 transitions. [2022-01-31 22:14:23,825 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 18055 transitions. Word has length 31 [2022-01-31 22:14:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 13321 states and 18055 transitions. [2022-01-31 22:14:23,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 18055 transitions. [2022-01-31 22:14:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 22:14:23,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:23,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:23,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 22:14:23,836 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1331228367, now seen corresponding path program 1 times [2022-01-31 22:14:23,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722466151] [2022-01-31 22:14:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:23,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:23,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:23,852 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 22:14:23,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722466151] [2022-01-31 22:14:23,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [722466151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:23,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:23,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:23,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292037959] [2022-01-31 22:14:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:23,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:23,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:23,854 INFO L87 Difference]: Start difference. First operand 13321 states and 18055 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:25,258 INFO L93 Difference]: Finished difference Result 30477 states and 41353 transitions. [2022-01-31 22:14:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 22:14:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:25,284 INFO L225 Difference]: With dead ends: 30477 [2022-01-31 22:14:25,284 INFO L226 Difference]: Without dead ends: 17419 [2022-01-31 22:14:25,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:25,309 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:25,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-01-31 22:14:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-01-31 22:14:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3380807442715212) internal successors, (23300), 17413 states have internal predecessors, (23300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 23303 transitions. [2022-01-31 22:14:26,725 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 23303 transitions. Word has length 31 [2022-01-31 22:14:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:26,725 INFO L470 AbstractCegarLoop]: Abstraction has 17417 states and 23303 transitions. [2022-01-31 22:14:26,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 23303 transitions. [2022-01-31 22:14:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 22:14:26,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:26,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:26,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 22:14:26,737 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1592089896, now seen corresponding path program 1 times [2022-01-31 22:14:26,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478043290] [2022-01-31 22:14:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:26,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:26,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:26,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:26,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478043290] [2022-01-31 22:14:26,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478043290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:26,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:26,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:26,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888505280] [2022-01-31 22:14:26,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:26,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:26,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:26,754 INFO L87 Difference]: Start difference. First operand 17417 states and 23303 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:28,310 INFO L93 Difference]: Finished difference Result 26125 states and 34825 transitions. [2022-01-31 22:14:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:28,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 22:14:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:28,337 INFO L225 Difference]: With dead ends: 26125 [2022-01-31 22:14:28,337 INFO L226 Difference]: Without dead ends: 17675 [2022-01-31 22:14:28,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:28,355 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:28,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-01-31 22:14:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-01-31 22:14:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.3186937574282642) internal successors, (23300), 17669 states have internal predecessors, (23300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 23303 transitions. [2022-01-31 22:14:29,827 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 23303 transitions. Word has length 32 [2022-01-31 22:14:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:29,827 INFO L470 AbstractCegarLoop]: Abstraction has 17673 states and 23303 transitions. [2022-01-31 22:14:29,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 23303 transitions. [2022-01-31 22:14:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 22:14:29,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:29,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:29,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 22:14:29,838 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1681809046, now seen corresponding path program 1 times [2022-01-31 22:14:29,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327396252] [2022-01-31 22:14:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:29,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:29,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:29,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:29,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327396252] [2022-01-31 22:14:29,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327396252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:29,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:29,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:29,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364210931] [2022-01-31 22:14:29,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:29,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:29,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:29,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:29,859 INFO L87 Difference]: Start difference. First operand 17673 states and 23303 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:32,657 INFO L93 Difference]: Finished difference Result 51469 states and 66825 transitions. [2022-01-31 22:14:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 22:14:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:32,709 INFO L225 Difference]: With dead ends: 51469 [2022-01-31 22:14:32,709 INFO L226 Difference]: Without dead ends: 34315 [2022-01-31 22:14:32,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:32,741 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:32,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 99 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-01-31 22:14:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-01-31 22:14:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2685884170334314) internal successors, (43524), 34309 states have internal predecessors, (43524), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 43527 transitions. [2022-01-31 22:14:35,665 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 43527 transitions. Word has length 32 [2022-01-31 22:14:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:35,666 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 43527 transitions. [2022-01-31 22:14:35,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 43527 transitions. [2022-01-31 22:14:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 22:14:35,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:35,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:35,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 22:14:35,688 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1333294572, now seen corresponding path program 1 times [2022-01-31 22:14:35,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402513070] [2022-01-31 22:14:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:35,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:35,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:35,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402513070] [2022-01-31 22:14:35,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402513070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:35,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:35,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:35,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538922768] [2022-01-31 22:14:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:35,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:35,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:35,715 INFO L87 Difference]: Start difference. First operand 34313 states and 43527 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:39,227 INFO L93 Difference]: Finished difference Result 37389 states and 48649 transitions. [2022-01-31 22:14:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 22:14:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:39,281 INFO L225 Difference]: With dead ends: 37389 [2022-01-31 22:14:39,282 INFO L226 Difference]: Without dead ends: 37387 [2022-01-31 22:14:39,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:39,294 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 96 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:39,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 120 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-01-31 22:14:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34313. [2022-01-31 22:14:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2536652190387363) internal successors, (43012), 34309 states have internal predecessors, (43012), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 43015 transitions. [2022-01-31 22:14:42,235 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 43015 transitions. Word has length 32 [2022-01-31 22:14:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:42,236 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 43015 transitions. [2022-01-31 22:14:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 43015 transitions. [2022-01-31 22:14:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 22:14:42,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:42,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:42,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 22:14:42,254 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash 596688678, now seen corresponding path program 1 times [2022-01-31 22:14:42,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:42,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296829096] [2022-01-31 22:14:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:42,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:42,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:42,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296829096] [2022-01-31 22:14:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296829096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:42,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:42,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:42,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815394534] [2022-01-31 22:14:42,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:42,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:42,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:42,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:42,277 INFO L87 Difference]: Start difference. First operand 34313 states and 43015 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:47,544 INFO L93 Difference]: Finished difference Result 56845 states and 71689 transitions. [2022-01-31 22:14:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 22:14:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:47,639 INFO L225 Difference]: With dead ends: 56845 [2022-01-31 22:14:47,639 INFO L226 Difference]: Without dead ends: 56843 [2022-01-31 22:14:47,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:47,659 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:47,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:14:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2022-01-31 22:14:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52745. [2022-01-31 22:14:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52745 states, 52741 states have (on average 1.2232608407121595) internal successors, (64516), 52741 states have internal predecessors, (64516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52745 states to 52745 states and 64519 transitions. [2022-01-31 22:14:52,717 INFO L78 Accepts]: Start accepts. Automaton has 52745 states and 64519 transitions. Word has length 33 [2022-01-31 22:14:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:14:52,717 INFO L470 AbstractCegarLoop]: Abstraction has 52745 states and 64519 transitions. [2022-01-31 22:14:52,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52745 states and 64519 transitions. [2022-01-31 22:14:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 22:14:52,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:14:52,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:14:52,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 22:14:52,753 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:14:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:14:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash -683175000, now seen corresponding path program 1 times [2022-01-31 22:14:52,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:14:52,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388920703] [2022-01-31 22:14:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:14:52,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:14:52,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:14:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:52,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:14:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:14:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:14:52,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:14:52,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388920703] [2022-01-31 22:14:52,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388920703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:14:52,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:14:52,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:14:52,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206329868] [2022-01-31 22:14:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:14:52,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:14:52,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:14:52,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:14:52,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:14:52,782 INFO L87 Difference]: Start difference. First operand 52745 states and 64519 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:14:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:14:58,980 INFO L93 Difference]: Finished difference Result 119309 states and 145417 transitions. [2022-01-31 22:14:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:14:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 22:14:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:14:59,285 INFO L225 Difference]: With dead ends: 119309 [2022-01-31 22:14:59,285 INFO L226 Difference]: Without dead ends: 67083 [2022-01-31 22:14:59,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:14:59,366 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:14:59,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:14:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2022-01-31 22:15:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67081. [2022-01-31 22:15:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67081 states, 67077 states have (on average 1.1908105609970632) internal successors, (79876), 67077 states have internal predecessors, (79876), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67081 states to 67081 states and 79879 transitions. [2022-01-31 22:15:05,674 INFO L78 Accepts]: Start accepts. Automaton has 67081 states and 79879 transitions. Word has length 33 [2022-01-31 22:15:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:15:05,675 INFO L470 AbstractCegarLoop]: Abstraction has 67081 states and 79879 transitions. [2022-01-31 22:15:05,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 67081 states and 79879 transitions. [2022-01-31 22:15:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 22:15:05,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:15:05,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:15:05,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 22:15:05,723 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:15:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:15:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1317695979, now seen corresponding path program 1 times [2022-01-31 22:15:05,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:15:05,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778861714] [2022-01-31 22:15:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:15:05,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:15:05,725 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:15:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:05,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:15:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:15:05,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:15:05,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778861714] [2022-01-31 22:15:05,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1778861714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:15:05,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:15:05,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:15:05,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141583131] [2022-01-31 22:15:05,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:15:05,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:15:05,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:15:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:15:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:15:05,740 INFO L87 Difference]: Start difference. First operand 67081 states and 79879 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:15:12,163 INFO L93 Difference]: Finished difference Result 101389 states and 120841 transitions. [2022-01-31 22:15:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:15:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 22:15:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:15:12,274 INFO L225 Difference]: With dead ends: 101389 [2022-01-31 22:15:12,274 INFO L226 Difference]: Without dead ends: 68619 [2022-01-31 22:15:12,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:15:12,323 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:15:12,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:15:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-01-31 22:15:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-01-31 22:15:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.1790768513255505) internal successors, (80900), 68613 states have internal predecessors, (80900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 80903 transitions. [2022-01-31 22:15:18,731 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 80903 transitions. Word has length 34 [2022-01-31 22:15:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:15:18,732 INFO L470 AbstractCegarLoop]: Abstraction has 68617 states and 80903 transitions. [2022-01-31 22:15:18,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 80903 transitions. [2022-01-31 22:15:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 22:15:18,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:15:18,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:15:18,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 22:15:18,775 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:15:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:15:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash 296627625, now seen corresponding path program 1 times [2022-01-31 22:15:18,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:15:18,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972381129] [2022-01-31 22:15:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:15:18,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:15:18,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:15:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:15:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:15:18,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:15:18,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972381129] [2022-01-31 22:15:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972381129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:15:18,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:15:18,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:15:18,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884692390] [2022-01-31 22:15:18,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:15:18,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:15:18,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:15:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:15:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:15:18,796 INFO L87 Difference]: Start difference. First operand 68617 states and 80903 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:15:29,650 INFO L93 Difference]: Finished difference Result 110603 states and 129032 transitions. [2022-01-31 22:15:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:15:29,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 22:15:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:15:30,014 INFO L225 Difference]: With dead ends: 110603 [2022-01-31 22:15:30,015 INFO L226 Difference]: Without dead ends: 110601 [2022-01-31 22:15:30,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:15:30,049 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:15:30,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:15:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-01-31 22:15:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-01-31 22:15:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.1538295415066526) internal successors, (122884), 106501 states have internal predecessors, (122884), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 122887 transitions. [2022-01-31 22:15:41,065 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 122887 transitions. Word has length 34 [2022-01-31 22:15:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:15:41,065 INFO L470 AbstractCegarLoop]: Abstraction has 106505 states and 122887 transitions. [2022-01-31 22:15:41,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 122887 transitions. [2022-01-31 22:15:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 22:15:41,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:15:41,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:15:41,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 22:15:41,315 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:15:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:15:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash -983236053, now seen corresponding path program 1 times [2022-01-31 22:15:41,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:15:41,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952392457] [2022-01-31 22:15:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:15:41,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:15:41,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:15:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:15:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:15:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:15:41,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:15:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952392457] [2022-01-31 22:15:41,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952392457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:15:41,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:15:41,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:15:41,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668045562] [2022-01-31 22:15:41,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:15:41,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:15:41,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:15:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:15:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:15:41,377 INFO L87 Difference]: Start difference. First operand 106505 states and 122887 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:15:54,676 INFO L93 Difference]: Finished difference Result 237577 states and 270343 transitions. [2022-01-31 22:15:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:15:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 22:15:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:15:54,677 INFO L225 Difference]: With dead ends: 237577 [2022-01-31 22:15:54,677 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 22:15:55,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:15:55,079 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:15:55,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:15:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 22:15:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 22:15:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 22:15:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 22:15:55,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-01-31 22:15:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:15:55,083 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 22:15:55,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 22:15:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 22:15:55,083 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 22:15:55,085 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 22:15:55,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 22:15:55,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.