/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 02:57:16,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:57:16,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:57:16,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 02:57:16,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 02:57:16,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:57:16,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:57:16,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:57:16,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:57:16,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:57:16,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:57:16,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:57:16,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:57:16,987 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:57:16,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:57:16,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:57:16,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:57:16,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:57:16,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:57:16,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:57:16,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:57:17,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:57:17,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:57:17,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:57:17,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:57:17,209 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:57:17,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2022-01-31 02:57:17,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301ce0b7f/a0de2712a4a040fb9052a79ced1fa046/FLAG8ed3ffb67 [2022-01-31 02:57:17,559 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:57:17,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2022-01-31 02:57:17,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301ce0b7f/a0de2712a4a040fb9052a79ced1fa046/FLAG8ed3ffb67 [2022-01-31 02:57:17,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301ce0b7f/a0de2712a4a040fb9052a79ced1fa046 [2022-01-31 02:57:17,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:57:17,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:57:17,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:57:17,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:57:17,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:57:17,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:57:17" (1/1) ... [2022-01-31 02:57:17,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57844603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:17, skipping insertion in model container [2022-01-31 02:57:17,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:57:17" (1/1) ... [2022-01-31 02:57:17,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:57:18,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:57:18,097 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c[368,381] [2022-01-31 02:57:18,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:57:18,124 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:57:18,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c[368,381] [2022-01-31 02:57:18,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:57:18,142 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:57:18,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18 WrapperNode [2022-01-31 02:57:18,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:57:18,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:57:18,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:57:18,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:57:18,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:57:18,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:57:18,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:57:18,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:57:18,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (1/1) ... [2022-01-31 02:57:18,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:57:18,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:18,200 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 02:57:18,206 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 02:57:18,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:57:18,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:57:18,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:57:18,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:57:18,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:57:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:57:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:57:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:57:18,272 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:57:18,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:57:18,384 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:57:18,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:57:18,388 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 02:57:18,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:57:18 BoogieIcfgContainer [2022-01-31 02:57:18,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:57:18,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:57:18,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:57:18,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:57:18,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:57:17" (1/3) ... [2022-01-31 02:57:18,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8254dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:57:18, skipping insertion in model container [2022-01-31 02:57:18,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:18" (2/3) ... [2022-01-31 02:57:18,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8254dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:57:18, skipping insertion in model container [2022-01-31 02:57:18,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:57:18" (3/3) ... [2022-01-31 02:57:18,398 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2022-01-31 02:57:18,401 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:57:18,401 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:57:18,447 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:57:18,464 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=FAST_UPR [2022-01-31 02:57:18,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:57:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 02:57:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 02:57:18,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:18,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:18,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2066875484, now seen corresponding path program 1 times [2022-01-31 02:57:18,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729789442] [2022-01-31 02:57:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:18,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:18,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:18,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729789442] [2022-01-31 02:57:18,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729789442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:18,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:18,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 02:57:18,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470945671] [2022-01-31 02:57:18,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:18,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 02:57:18,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 02:57:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 02:57:18,673 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:18,728 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-01-31 02:57:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 02:57:18,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 02:57:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:18,733 INFO L225 Difference]: With dead ends: 39 [2022-01-31 02:57:18,734 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 02:57:18,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 02:57:18,738 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:18,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 02:57:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 02:57:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-31 02:57:18,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 15 [2022-01-31 02:57:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:18,773 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-31 02:57:18,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-31 02:57:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 02:57:18,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:18,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:18,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:57:18,774 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2063181400, now seen corresponding path program 1 times [2022-01-31 02:57:18,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023034864] [2022-01-31 02:57:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:18,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:19,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:19,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023034864] [2022-01-31 02:57:19,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023034864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:19,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:19,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 02:57:19,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39549707] [2022-01-31 02:57:19,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:19,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 02:57:19,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 02:57:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 02:57:19,108 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:19,300 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-01-31 02:57:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 02:57:19,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 02:57:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:19,302 INFO L225 Difference]: With dead ends: 33 [2022-01-31 02:57:19,302 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 02:57:19,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-31 02:57:19,303 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:19,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:19,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 02:57:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 02:57:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-31 02:57:19,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2022-01-31 02:57:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-31 02:57:19,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-31 02:57:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 02:57:19,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:19,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:19,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 02:57:19,310 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 971437455, now seen corresponding path program 1 times [2022-01-31 02:57:19,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:19,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056738147] [2022-01-31 02:57:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:19,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:19,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056738147] [2022-01-31 02:57:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056738147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:19,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:19,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:57:19,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366971410] [2022-01-31 02:57:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:19,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:57:19,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:57:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:57:19,343 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:19,368 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-01-31 02:57:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:57:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 02:57:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:19,369 INFO L225 Difference]: With dead ends: 33 [2022-01-31 02:57:19,369 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 02:57:19,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:57:19,371 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:19,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 02:57:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-31 02:57:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-01-31 02:57:19,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 16 [2022-01-31 02:57:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:19,375 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-01-31 02:57:19,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-01-31 02:57:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 02:57:19,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:19,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:19,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 02:57:19,376 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1509444864, now seen corresponding path program 1 times [2022-01-31 02:57:19,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:19,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301118385] [2022-01-31 02:57:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:19,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:19,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:19,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301118385] [2022-01-31 02:57:19,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301118385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:19,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:19,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 02:57:19,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014003651] [2022-01-31 02:57:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:19,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 02:57:19,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 02:57:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:57:19,410 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:19,444 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-01-31 02:57:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 02:57:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 02:57:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:19,445 INFO L225 Difference]: With dead ends: 27 [2022-01-31 02:57:19,445 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 02:57:19,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 02:57:19,446 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:19,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 02:57:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 02:57:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-01-31 02:57:19,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 16 [2022-01-31 02:57:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-01-31 02:57:19,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-01-31 02:57:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 02:57:19,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:19,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:19,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 02:57:19,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:19,452 INFO L85 PathProgramCache]: Analyzing trace with hash 570818913, now seen corresponding path program 1 times [2022-01-31 02:57:19,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:19,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126599497] [2022-01-31 02:57:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:19,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:19,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:19,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126599497] [2022-01-31 02:57:19,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126599497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:19,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181486928] [2022-01-31 02:57:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:19,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:19,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:19,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:57:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 02:57:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:19,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:19,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181486928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:19,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:19,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-31 02:57:19,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529096297] [2022-01-31 02:57:19,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:19,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 02:57:19,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 02:57:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 02:57:19,742 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:19,918 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2022-01-31 02:57:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:57:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 02:57:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:19,921 INFO L225 Difference]: With dead ends: 43 [2022-01-31 02:57:19,922 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 02:57:19,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-01-31 02:57:19,933 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:19,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 31 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 02:57:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-01-31 02:57:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-01-31 02:57:19,943 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2022-01-31 02:57:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:19,943 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-01-31 02:57:19,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-01-31 02:57:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 02:57:19,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:19,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:19,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:20,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:20,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:20,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1344200880, now seen corresponding path program 1 times [2022-01-31 02:57:20,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:20,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40846648] [2022-01-31 02:57:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:20,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:20,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:20,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40846648] [2022-01-31 02:57:20,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40846648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380922611] [2022-01-31 02:57:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:20,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:20,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:20,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:57:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 02:57:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:20,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380922611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:20,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:20,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-31 02:57:20,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900226046] [2022-01-31 02:57:20,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:20,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 02:57:20,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 02:57:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:57:20,391 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:20,447 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-01-31 02:57:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 02:57:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 02:57:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:20,448 INFO L225 Difference]: With dead ends: 45 [2022-01-31 02:57:20,448 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 02:57:20,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 02:57:20,449 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:20,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 02:57:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-01-31 02:57:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-01-31 02:57:20,456 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-01-31 02:57:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:20,456 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-01-31 02:57:20,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-01-31 02:57:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 02:57:20,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:20,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:20,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:20,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 02:57:20,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1244950584, now seen corresponding path program 1 times [2022-01-31 02:57:20,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:20,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581444987] [2022-01-31 02:57:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:20,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:20,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:20,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581444987] [2022-01-31 02:57:20,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581444987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:20,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830175705] [2022-01-31 02:57:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:20,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:20,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:20,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:20,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:57:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:20,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 02:57:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:21,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:21,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830175705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:21,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 26 [2022-01-31 02:57:21,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715877245] [2022-01-31 02:57:21,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 02:57:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 02:57:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-31 02:57:21,839 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:22,381 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-01-31 02:57:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 02:57:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 02:57:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:22,382 INFO L225 Difference]: With dead ends: 52 [2022-01-31 02:57:22,382 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 02:57:22,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 02:57:22,383 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:22,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 79 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:57:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 02:57:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-31 02:57:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-01-31 02:57:22,388 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2022-01-31 02:57:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:22,388 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-01-31 02:57:22,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 23 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-01-31 02:57:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 02:57:22,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:22,393 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:22,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:22,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:22,594 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash 146579608, now seen corresponding path program 2 times [2022-01-31 02:57:22,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:22,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660281417] [2022-01-31 02:57:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:22,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:22,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:22,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:22,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660281417] [2022-01-31 02:57:22,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660281417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078484862] [2022-01-31 02:57:22,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:22,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:22,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:22,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:57:22,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:22,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 02:57:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:22,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078484862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:22,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:22,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 02:57:22,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068603186] [2022-01-31 02:57:22,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:22,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 02:57:22,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:22,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 02:57:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 02:57:22,905 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:23,551 INFO L93 Difference]: Finished difference Result 112 states and 185 transitions. [2022-01-31 02:57:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 02:57:23,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 02:57:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:23,556 INFO L225 Difference]: With dead ends: 112 [2022-01-31 02:57:23,556 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 02:57:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=1091, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 02:57:23,557 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:23,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 60 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:57:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 02:57:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2022-01-31 02:57:23,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-01-31 02:57:23,579 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 19 [2022-01-31 02:57:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:23,579 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-01-31 02:57:23,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-01-31 02:57:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 02:57:23,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:23,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:23,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:23,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:23,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1586904504, now seen corresponding path program 2 times [2022-01-31 02:57:23,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:23,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128434946] [2022-01-31 02:57:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:23,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:23,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:57:23,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128434946] [2022-01-31 02:57:23,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128434946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81151221] [2022-01-31 02:57:23,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:23,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:23,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:23,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:57:23,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 02:57:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:57:23,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:57:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81151221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:24,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:24,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-01-31 02:57:24,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491362706] [2022-01-31 02:57:24,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:24,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 02:57:24,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 02:57:24,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:57:24,004 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:24,229 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2022-01-31 02:57:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 02:57:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 02:57:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:24,230 INFO L225 Difference]: With dead ends: 85 [2022-01-31 02:57:24,230 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 02:57:24,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-01-31 02:57:24,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:24,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 02:57:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2022-01-31 02:57:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 52 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-01-31 02:57:24,239 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 21 [2022-01-31 02:57:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:24,239 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-01-31 02:57:24,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-01-31 02:57:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 02:57:24,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:24,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:24,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:24,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:24,452 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 323810136, now seen corresponding path program 2 times [2022-01-31 02:57:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788810980] [2022-01-31 02:57:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:24,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:24,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:24,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:24,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788810980] [2022-01-31 02:57:24,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788810980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511170787] [2022-01-31 02:57:24,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:24,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:24,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:24,511 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 02:57:24,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:24,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 02:57:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:24,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:24,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511170787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:24,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:24,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-01-31 02:57:24,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338831657] [2022-01-31 02:57:24,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:24,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 02:57:24,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 02:57:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-31 02:57:24,674 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:24,768 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2022-01-31 02:57:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 02:57:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 02:57:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:24,769 INFO L225 Difference]: With dead ends: 78 [2022-01-31 02:57:24,770 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 02:57:24,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-31 02:57:24,770 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:24,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 02:57:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2022-01-31 02:57:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2022-01-31 02:57:24,778 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 21 [2022-01-31 02:57:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:24,779 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2022-01-31 02:57:24,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2022-01-31 02:57:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 02:57:24,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:24,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:24,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:24,991 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1247228840, now seen corresponding path program 3 times [2022-01-31 02:57:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171887558] [2022-01-31 02:57:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:24,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:25,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171887558] [2022-01-31 02:57:25,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171887558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391994749] [2022-01-31 02:57:25,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:57:25,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:25,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:25,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 02:57:25,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 02:57:25,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:25,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 02:57:25,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:26,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:27,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391994749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:27,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:27,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-01-31 02:57:27,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067988326] [2022-01-31 02:57:27,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:27,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 02:57:27,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:27,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 02:57:27,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 02:57:27,788 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:31,628 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2022-01-31 02:57:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 02:57:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (6), 4 states have call predecessors, (6), 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 02:57:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:31,629 INFO L225 Difference]: With dead ends: 93 [2022-01-31 02:57:31,629 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 02:57:31,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=351, Invalid=2729, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 02:57:31,630 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:31,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 108 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 02:57:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 02:57:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-01-31 02:57:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2022-01-31 02:57:31,638 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 23 [2022-01-31 02:57:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:31,638 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2022-01-31 02:57:31,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2022-01-31 02:57:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 02:57:31,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:31,639 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:31,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:31,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:31,851 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:31,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1493658120, now seen corresponding path program 4 times [2022-01-31 02:57:31,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:31,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025061569] [2022-01-31 02:57:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:31,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:31,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:57:31,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:31,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025061569] [2022-01-31 02:57:31,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025061569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:31,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941430143] [2022-01-31 02:57:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:57:31,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:31,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:31,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 02:57:31,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:57:31,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 02:57:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:57:32,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:57:32,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941430143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:32,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:32,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-01-31 02:57:32,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180081498] [2022-01-31 02:57:32,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:32,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 02:57:32,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 02:57:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-31 02:57:32,170 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:34,678 INFO L93 Difference]: Finished difference Result 178 states and 265 transitions. [2022-01-31 02:57:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 02:57:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:57:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:34,679 INFO L225 Difference]: With dead ends: 178 [2022-01-31 02:57:34,679 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 02:57:34,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1367, Invalid=4183, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 02:57:34,681 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 195 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:34,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 84 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 02:57:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 02:57:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 95. [2022-01-31 02:57:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 90 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 127 transitions. [2022-01-31 02:57:34,702 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 127 transitions. Word has length 23 [2022-01-31 02:57:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 127 transitions. [2022-01-31 02:57:34,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 127 transitions. [2022-01-31 02:57:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 02:57:34,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:34,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:34,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:34,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 02:57:34,905 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1347388208, now seen corresponding path program 3 times [2022-01-31 02:57:34,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:34,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960068195] [2022-01-31 02:57:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:34,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:34,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:57:34,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:34,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960068195] [2022-01-31 02:57:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960068195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:34,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249705020] [2022-01-31 02:57:34,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:57:34,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:34,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:34,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:34,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 02:57:35,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 02:57:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 02:57:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:57:35,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:57:35,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249705020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:35,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:35,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-01-31 02:57:35,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681505856] [2022-01-31 02:57:35,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:35,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 02:57:35,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 02:57:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-31 02:57:35,127 INFO L87 Difference]: Start difference. First operand 95 states and 127 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:35,274 INFO L93 Difference]: Finished difference Result 122 states and 166 transitions. [2022-01-31 02:57:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 02:57:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:57:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:35,274 INFO L225 Difference]: With dead ends: 122 [2022-01-31 02:57:35,274 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 02:57:35,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 02:57:35,275 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:35,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 51 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 02:57:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2022-01-31 02:57:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-01-31 02:57:35,284 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 24 [2022-01-31 02:57:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:35,284 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-01-31 02:57:35,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-01-31 02:57:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 02:57:35,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:35,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:35,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:35,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 02:57:35,491 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 467119846, now seen corresponding path program 5 times [2022-01-31 02:57:35,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:35,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422319229] [2022-01-31 02:57:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:35,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:35,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 02:57:35,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422319229] [2022-01-31 02:57:35,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422319229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:35,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216028042] [2022-01-31 02:57:35,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:57:35,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:35,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:35,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 02:57:35,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-31 02:57:35,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:35,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 02:57:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 02:57:35,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 02:57:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216028042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:35,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:35,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-01-31 02:57:35,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229455434] [2022-01-31 02:57:35,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:35,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 02:57:35,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 02:57:35,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:57:35,808 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:36,281 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2022-01-31 02:57:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 02:57:36,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:57:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:36,282 INFO L225 Difference]: With dead ends: 150 [2022-01-31 02:57:36,283 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 02:57:36,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 02:57:36,284 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:36,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 02:57:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 106. [2022-01-31 02:57:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.3663366336633664) internal successors, (138), 101 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2022-01-31 02:57:36,293 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 25 [2022-01-31 02:57:36,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:36,293 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2022-01-31 02:57:36,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2022-01-31 02:57:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 02:57:36,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:36,294 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:36,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:36,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 02:57:36,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 415342529, now seen corresponding path program 3 times [2022-01-31 02:57:36,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601121481] [2022-01-31 02:57:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:36,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:36,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601121481] [2022-01-31 02:57:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601121481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77670660] [2022-01-31 02:57:36,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:57:36,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:36,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:36,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:57:36,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 02:57:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 02:57:36,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 02:57:36,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:36,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:37,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77670660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:37,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:37,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-01-31 02:57:37,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758364784] [2022-01-31 02:57:37,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:37,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 02:57:37,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 02:57:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 02:57:37,132 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:05,035 INFO L93 Difference]: Finished difference Result 398 states and 600 transitions. [2022-01-31 02:58:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 02:58:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:58:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:05,040 INFO L225 Difference]: With dead ends: 398 [2022-01-31 02:58:05,040 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 02:58:05,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=1980, Invalid=5676, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 02:58:05,043 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 762 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:05,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 104 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 02:58:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 02:58:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 155. [2022-01-31 02:58:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.3666666666666667) internal successors, (205), 150 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 209 transitions. [2022-01-31 02:58:05,062 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 209 transitions. Word has length 26 [2022-01-31 02:58:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:05,062 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 209 transitions. [2022-01-31 02:58:05,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 209 transitions. [2022-01-31 02:58:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:58:05,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:05,063 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:05,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:05,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 02:58:05,267 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:05,267 INFO L85 PathProgramCache]: Analyzing trace with hash 523877976, now seen corresponding path program 6 times [2022-01-31 02:58:05,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:05,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121722526] [2022-01-31 02:58:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:05,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:05,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 02:58:05,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121722526] [2022-01-31 02:58:05,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121722526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472207715] [2022-01-31 02:58:05,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 02:58:05,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:05,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:05,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:58:05,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 02:58:05,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 02:58:05,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 02:58:05,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:58:05,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:58:05,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472207715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:05,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:05,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 17 [2022-01-31 02:58:05,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524890650] [2022-01-31 02:58:05,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:05,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 02:58:05,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 02:58:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-01-31 02:58:05,574 INFO L87 Difference]: Start difference. First operand 155 states and 209 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:06,966 INFO L93 Difference]: Finished difference Result 342 states and 494 transitions. [2022-01-31 02:58:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 02:58:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:58:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:06,967 INFO L225 Difference]: With dead ends: 342 [2022-01-31 02:58:06,967 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 02:58:06,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 02:58:06,968 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 124 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:06,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 93 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 02:58:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 02:58:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2022-01-31 02:58:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.4444444444444444) internal successors, (455), 315 states have internal predecessors, (455), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 459 transitions. [2022-01-31 02:58:07,000 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 459 transitions. Word has length 27 [2022-01-31 02:58:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 459 transitions. [2022-01-31 02:58:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 459 transitions. [2022-01-31 02:58:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:58:07,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:07,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:07,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 02:58:07,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 02:58:07,204 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash -828351928, now seen corresponding path program 7 times [2022-01-31 02:58:07,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:07,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081589284] [2022-01-31 02:58:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:07,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:07,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:58:07,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:07,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081589284] [2022-01-31 02:58:07,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081589284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114880474] [2022-01-31 02:58:07,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 02:58:07,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:07,455 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:58:07,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 02:58:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:07,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 02:58:07,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:58:08,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:58:09,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114880474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:09,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:09,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 48 [2022-01-31 02:58:09,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826861267] [2022-01-31 02:58:09,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:09,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 02:58:09,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 02:58:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 02:58:09,464 INFO L87 Difference]: Start difference. First operand 320 states and 459 transitions. Second operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 45 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:14,634 INFO L93 Difference]: Finished difference Result 382 states and 538 transitions. [2022-01-31 02:58:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 02:58:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 45 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 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 02:58:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:14,636 INFO L225 Difference]: With dead ends: 382 [2022-01-31 02:58:14,636 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 02:58:14,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=634, Invalid=5218, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 02:58:14,638 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:14,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 148 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 02:58:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 02:58:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 322. [2022-01-31 02:58:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.4227129337539433) internal successors, (451), 317 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 455 transitions. [2022-01-31 02:58:14,669 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 455 transitions. Word has length 27 [2022-01-31 02:58:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:14,670 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 455 transitions. [2022-01-31 02:58:14,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 45 states have internal predecessors, (61), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 455 transitions. [2022-01-31 02:58:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:58:14,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:14,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:14,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:14,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 02:58:14,874 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -734568360, now seen corresponding path program 4 times [2022-01-31 02:58:14,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:14,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044556182] [2022-01-31 02:58:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:14,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:14,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:14,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044556182] [2022-01-31 02:58:14,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044556182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557983636] [2022-01-31 02:58:14,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:58:14,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:14,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:14,969 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:58:14,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 02:58:15,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:58:15,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 02:58:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:15,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:15,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557983636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:15,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:15,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-01-31 02:58:15,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852942952] [2022-01-31 02:58:15,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:15,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 02:58:15,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 02:58:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-31 02:58:15,168 INFO L87 Difference]: Start difference. First operand 322 states and 455 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:15,430 INFO L93 Difference]: Finished difference Result 336 states and 476 transitions. [2022-01-31 02:58:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:58:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:58:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:15,432 INFO L225 Difference]: With dead ends: 336 [2022-01-31 02:58:15,432 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 02:58:15,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-01-31 02:58:15,432 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:15,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 65 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:58:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 02:58:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 322. [2022-01-31 02:58:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 317 states have (on average 1.4195583596214512) internal successors, (450), 317 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 454 transitions. [2022-01-31 02:58:15,466 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 454 transitions. Word has length 27 [2022-01-31 02:58:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 454 transitions. [2022-01-31 02:58:15,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 454 transitions. [2022-01-31 02:58:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 02:58:15,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:15,467 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:15,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:15,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:15,671 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2010729856, now seen corresponding path program 5 times [2022-01-31 02:58:15,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234291600] [2022-01-31 02:58:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:15,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:15,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:15,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234291600] [2022-01-31 02:58:15,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234291600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214753974] [2022-01-31 02:58:15,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:58:15,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:15,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:15,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:58:15,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 02:58:15,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 02:58:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 02:58:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:15,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:16,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214753974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:16,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:16,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-31 02:58:16,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348620992] [2022-01-31 02:58:16,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:16,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 02:58:16,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 02:58:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-01-31 02:58:16,182 INFO L87 Difference]: Start difference. First operand 322 states and 454 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:17,232 INFO L93 Difference]: Finished difference Result 677 states and 869 transitions. [2022-01-31 02:58:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 02:58:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:58:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:17,234 INFO L225 Difference]: With dead ends: 677 [2022-01-31 02:58:17,234 INFO L226 Difference]: Without dead ends: 603 [2022-01-31 02:58:17,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=852, Invalid=3704, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 02:58:17,236 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:17,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 95 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:58:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-31 02:58:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 356. [2022-01-31 02:58:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.4472934472934473) internal successors, (508), 351 states have internal predecessors, (508), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 512 transitions. [2022-01-31 02:58:17,282 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 512 transitions. Word has length 28 [2022-01-31 02:58:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:17,283 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 512 transitions. [2022-01-31 02:58:17,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 512 transitions. [2022-01-31 02:58:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 02:58:17,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:17,283 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:17,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:17,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:17,487 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1541621168, now seen corresponding path program 6 times [2022-01-31 02:58:17,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364986815] [2022-01-31 02:58:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:17,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:17,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:17,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:17,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364986815] [2022-01-31 02:58:17,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364986815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:17,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411060250] [2022-01-31 02:58:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 02:58:17,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:17,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:17,612 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:58:17,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 02:58:17,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 02:58:17,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:17,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 02:58:17,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:17,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:17,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411060250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:17,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:17,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-01-31 02:58:17,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795679637] [2022-01-31 02:58:17,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:17,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 02:58:17,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 02:58:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-31 02:58:17,824 INFO L87 Difference]: Start difference. First operand 356 states and 512 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:18,165 INFO L93 Difference]: Finished difference Result 374 states and 539 transitions. [2022-01-31 02:58:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 02:58:18,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:58:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:18,166 INFO L225 Difference]: With dead ends: 374 [2022-01-31 02:58:18,166 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 02:58:18,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 02:58:18,168 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:18,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 72 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:58:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 02:58:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 356. [2022-01-31 02:58:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.4415954415954415) internal successors, (506), 351 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 510 transitions. [2022-01-31 02:58:18,222 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 510 transitions. Word has length 30 [2022-01-31 02:58:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:18,222 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 510 transitions. [2022-01-31 02:58:18,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 510 transitions. [2022-01-31 02:58:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 02:58:18,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:18,224 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:18,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:18,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:18,439 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash -759780175, now seen corresponding path program 8 times [2022-01-31 02:58:18,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:18,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996894388] [2022-01-31 02:58:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:18,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:18,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:58:18,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996894388] [2022-01-31 02:58:18,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996894388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103900479] [2022-01-31 02:58:18,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:58:18,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:18,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:58:18,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 02:58:18,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:58:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 02:58:18,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:58:18,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:58:19,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103900479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:19,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:19,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 02:58:19,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553153212] [2022-01-31 02:58:19,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:19,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 02:58:19,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 02:58:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 02:58:19,078 INFO L87 Difference]: Start difference. First operand 356 states and 510 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:58,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:59:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:59:59,571 INFO L93 Difference]: Finished difference Result 1204 states and 1906 transitions. [2022-01-31 02:59:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 02:59:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 02:59:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:59:59,576 INFO L225 Difference]: With dead ends: 1204 [2022-01-31 02:59:59,576 INFO L226 Difference]: Without dead ends: 1141 [2022-01-31 02:59:59,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9274 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=5877, Invalid=18302, Unknown=1, NotChecked=0, Total=24180 [2022-01-31 02:59:59,582 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 876 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-31 02:59:59,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 111 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-01-31 02:59:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-01-31 02:59:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 407. [2022-01-31 02:59:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.4527363184079602) internal successors, (584), 402 states have internal predecessors, (584), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 588 transitions. [2022-01-31 02:59:59,632 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 588 transitions. Word has length 30 [2022-01-31 02:59:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:59:59,633 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 588 transitions. [2022-01-31 02:59:59,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:59:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 588 transitions. [2022-01-31 02:59:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:59:59,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:59:59,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:59:59,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 02:59:59,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:59:59,852 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:59:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:59:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1818120792, now seen corresponding path program 9 times [2022-01-31 02:59:59,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:59:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375332906] [2022-01-31 02:59:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:59:59,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:59:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:00,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:00:00,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:00,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375332906] [2022-01-31 03:00:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375332906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:00,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651774250] [2022-01-31 03:00:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:00:00,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:00,159 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:00:00,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 03:00:00,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 03:00:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:00,371 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 70 conjunts are in the unsatisfiable core [2022-01-31 03:00:00,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:00:01,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:00:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651774250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:02,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:02,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 60 [2022-01-31 03:00:02,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400070906] [2022-01-31 03:00:02,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:02,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 03:00:02,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 03:00:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3161, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 03:00:02,531 INFO L87 Difference]: Start difference. First operand 407 states and 588 transitions. Second operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 57 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:07,251 INFO L93 Difference]: Finished difference Result 433 states and 616 transitions. [2022-01-31 03:00:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 03:00:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 57 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 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 03:00:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:07,253 INFO L225 Difference]: With dead ends: 433 [2022-01-31 03:00:07,253 INFO L226 Difference]: Without dead ends: 406 [2022-01-31 03:00:07,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1031, Invalid=7899, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 03:00:07,256 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 181 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 03:00:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-31 03:00:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 401. [2022-01-31 03:00:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.457070707070707) internal successors, (577), 396 states have internal predecessors, (577), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 581 transitions. [2022-01-31 03:00:07,305 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 581 transitions. Word has length 31 [2022-01-31 03:00:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:07,305 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 581 transitions. [2022-01-31 03:00:07,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 57 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 581 transitions. [2022-01-31 03:00:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 03:00:07,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:07,306 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:07,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:07,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:07,510 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash -281941914, now seen corresponding path program 7 times [2022-01-31 03:00:07,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:07,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367442007] [2022-01-31 03:00:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:07,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:07,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 03:00:07,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367442007] [2022-01-31 03:00:07,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367442007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674976667] [2022-01-31 03:00:07,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:00:07,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:07,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:07,637 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:00:07,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 03:00:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 03:00:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 03:00:07,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 03:00:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674976667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:08,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-01-31 03:00:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416351926] [2022-01-31 03:00:08,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:08,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 03:00:08,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 03:00:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 03:00:08,116 INFO L87 Difference]: Start difference. First operand 401 states and 581 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:09,879 INFO L93 Difference]: Finished difference Result 781 states and 991 transitions. [2022-01-31 03:00:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 03:00:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 03:00:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:09,881 INFO L225 Difference]: With dead ends: 781 [2022-01-31 03:00:09,881 INFO L226 Difference]: Without dead ends: 708 [2022-01-31 03:00:09,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1269, Invalid=5703, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 03:00:09,883 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:09,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 118 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 03:00:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-01-31 03:00:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 409. [2022-01-31 03:00:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 404 states have (on average 1.443069306930693) internal successors, (583), 404 states have internal predecessors, (583), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 587 transitions. [2022-01-31 03:00:09,936 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 587 transitions. Word has length 31 [2022-01-31 03:00:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:09,936 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 587 transitions. [2022-01-31 03:00:09,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 587 transitions. [2022-01-31 03:00:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 03:00:09,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:09,937 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:09,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:10,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:10,152 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash -397406416, now seen corresponding path program 10 times [2022-01-31 03:00:10,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:10,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459920972] [2022-01-31 03:00:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:10,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:00:10,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:10,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459920972] [2022-01-31 03:00:10,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459920972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:10,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142699212] [2022-01-31 03:00:10,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:00:10,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:10,202 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:00:10,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 03:00:10,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:00:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 03:00:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:00:10,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:00:10,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142699212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:10,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:10,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-31 03:00:10,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73825802] [2022-01-31 03:00:10,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:10,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 03:00:10,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:10,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 03:00:10,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 03:00:10,328 INFO L87 Difference]: Start difference. First operand 409 states and 587 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:10,458 INFO L93 Difference]: Finished difference Result 419 states and 598 transitions. [2022-01-31 03:00:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:00:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 03:00:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:10,460 INFO L225 Difference]: With dead ends: 419 [2022-01-31 03:00:10,460 INFO L226 Difference]: Without dead ends: 396 [2022-01-31 03:00:10,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 03:00:10,461 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:10,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 47 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:00:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-31 03:00:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 393. [2022-01-31 03:00:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 388 states have (on average 1.458762886597938) internal successors, (566), 388 states have internal predecessors, (566), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 570 transitions. [2022-01-31 03:00:10,510 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 570 transitions. Word has length 32 [2022-01-31 03:00:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:10,510 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 570 transitions. [2022-01-31 03:00:10,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 570 transitions. [2022-01-31 03:00:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 03:00:10,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:10,511 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:10,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:10,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 03:00:10,723 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:10,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2019384376, now seen corresponding path program 11 times [2022-01-31 03:00:10,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:10,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759148163] [2022-01-31 03:00:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:10,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:10,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 03:00:10,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759148163] [2022-01-31 03:00:10,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759148163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549172347] [2022-01-31 03:00:10,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:00:10,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:10,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:00:10,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 03:00:10,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 03:00:10,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:10,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 03:00:10,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 03:00:11,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 03:00:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549172347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:11,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:11,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 26 [2022-01-31 03:00:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613566042] [2022-01-31 03:00:11,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:11,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 03:00:11,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 03:00:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-31 03:00:11,194 INFO L87 Difference]: Start difference. First operand 393 states and 570 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:12,351 INFO L93 Difference]: Finished difference Result 576 states and 789 transitions. [2022-01-31 03:00:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 03:00:12,351 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 03:00:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:12,353 INFO L225 Difference]: With dead ends: 576 [2022-01-31 03:00:12,353 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 03:00:12,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 03:00:12,354 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:12,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 89 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:00:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 03:00:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 375. [2022-01-31 03:00:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.4405405405405405) internal successors, (533), 370 states have internal predecessors, (533), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 537 transitions. [2022-01-31 03:00:12,403 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 537 transitions. Word has length 33 [2022-01-31 03:00:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:12,403 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 537 transitions. [2022-01-31 03:00:12,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 537 transitions. [2022-01-31 03:00:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 03:00:12,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:12,404 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:12,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:12,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 03:00:12,608 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash -475206312, now seen corresponding path program 8 times [2022-01-31 03:00:12,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:12,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407356498] [2022-01-31 03:00:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:12,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 03:00:12,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407356498] [2022-01-31 03:00:12,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407356498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399823600] [2022-01-31 03:00:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:00:12,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:12,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:00:12,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 03:00:12,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:00:12,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 03:00:12,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 03:00:12,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 03:00:12,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399823600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:12,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:12,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-01-31 03:00:12,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554950199] [2022-01-31 03:00:12,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:12,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 03:00:12,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 03:00:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-01-31 03:00:12,973 INFO L87 Difference]: Start difference. First operand 375 states and 537 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:13,393 INFO L93 Difference]: Finished difference Result 395 states and 567 transitions. [2022-01-31 03:00:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 03:00:13,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 03:00:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:13,396 INFO L225 Difference]: With dead ends: 395 [2022-01-31 03:00:13,396 INFO L226 Difference]: Without dead ends: 390 [2022-01-31 03:00:13,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 03:00:13,397 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 96 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:13,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 80 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:00:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-31 03:00:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 378. [2022-01-31 03:00:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.4369973190348526) internal successors, (536), 373 states have internal predecessors, (536), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 540 transitions. [2022-01-31 03:00:13,462 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 540 transitions. Word has length 33 [2022-01-31 03:00:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:13,462 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 540 transitions. [2022-01-31 03:00:13,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 540 transitions. [2022-01-31 03:00:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 03:00:13,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:13,463 INFO L514 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:13,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:13,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 03:00:13,667 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash -59159359, now seen corresponding path program 12 times [2022-01-31 03:00:13,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964498882] [2022-01-31 03:00:13,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:13,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 03:00:13,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:13,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964498882] [2022-01-31 03:00:13,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964498882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:13,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985642976] [2022-01-31 03:00:13,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:00:13,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:13,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:13,873 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:00:13,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 03:00:14,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 03:00:14,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 03:00:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 03:00:14,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 03:00:14,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985642976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:14,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:14,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 34 [2022-01-31 03:00:14,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748533010] [2022-01-31 03:00:14,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 03:00:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 03:00:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 03:00:14,513 INFO L87 Difference]: Start difference. First operand 378 states and 540 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:16,888 INFO L93 Difference]: Finished difference Result 1229 states and 1831 transitions. [2022-01-31 03:01:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 03:01:16,889 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 03:01:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:16,891 INFO L225 Difference]: With dead ends: 1229 [2022-01-31 03:01:16,892 INFO L226 Difference]: Without dead ends: 1137 [2022-01-31 03:01:16,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=2671, Invalid=7631, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 03:01:16,893 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 961 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:16,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 123 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 03:01:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-01-31 03:01:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 438. [2022-01-31 03:01:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.4549653579676673) internal successors, (630), 433 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 634 transitions. [2022-01-31 03:01:16,957 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 634 transitions. Word has length 34 [2022-01-31 03:01:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:16,957 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 634 transitions. [2022-01-31 03:01:16,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 634 transitions. [2022-01-31 03:01:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 03:01:16,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:16,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:16,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:17,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:17,162 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 144704712, now seen corresponding path program 13 times [2022-01-31 03:01:17,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:17,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900861838] [2022-01-31 03:01:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:17,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:01:17,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900861838] [2022-01-31 03:01:17,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900861838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246525418] [2022-01-31 03:01:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:01:17,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:17,555 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:01:17,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 03:01:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:17,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 80 conjunts are in the unsatisfiable core [2022-01-31 03:01:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:01:18,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:01:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246525418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:19,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:19,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 22] total 55 [2022-01-31 03:01:19,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426885759] [2022-01-31 03:01:19,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:19,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 03:01:19,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 03:01:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 03:01:19,601 INFO L87 Difference]: Start difference. First operand 438 states and 634 transitions. Second operand has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:22,267 INFO L93 Difference]: Finished difference Result 456 states and 652 transitions. [2022-01-31 03:01:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 03:01:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 03:01:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:22,269 INFO L225 Difference]: With dead ends: 456 [2022-01-31 03:01:22,269 INFO L226 Difference]: Without dead ends: 451 [2022-01-31 03:01:22,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=503, Invalid=6303, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 03:01:22,270 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:22,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 154 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 03:01:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-31 03:01:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 445. [2022-01-31 03:01:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.4477272727272728) internal successors, (637), 440 states have internal predecessors, (637), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 641 transitions. [2022-01-31 03:01:22,346 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 641 transitions. Word has length 35 [2022-01-31 03:01:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:22,346 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 641 transitions. [2022-01-31 03:01:22,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 52 states have internal predecessors, (68), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 641 transitions. [2022-01-31 03:01:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 03:01:22,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:22,347 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:22,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:22,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 03:01:22,558 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1143532120, now seen corresponding path program 9 times [2022-01-31 03:01:22,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:22,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490557163] [2022-01-31 03:01:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:22,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:22,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:01:22,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490557163] [2022-01-31 03:01:22,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490557163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246393698] [2022-01-31 03:01:22,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:01:22,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:22,709 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:01:22,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 03:01:22,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 03:01:22,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:01:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 03:01:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:01:23,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:01:23,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246393698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:23,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:23,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2022-01-31 03:01:23,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495815935] [2022-01-31 03:01:23,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:23,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 03:01:23,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 03:01:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 03:01:23,365 INFO L87 Difference]: Start difference. First operand 445 states and 641 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:26,601 INFO L93 Difference]: Finished difference Result 817 states and 1037 transitions. [2022-01-31 03:01:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 03:01:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 03:01:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:26,603 INFO L225 Difference]: With dead ends: 817 [2022-01-31 03:01:26,603 INFO L226 Difference]: Without dead ends: 758 [2022-01-31 03:01:26,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1890, Invalid=8616, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 03:01:26,605 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 336 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:26,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 105 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 03:01:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-01-31 03:01:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 449. [2022-01-31 03:01:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 444 states have (on average 1.436936936936937) internal successors, (638), 444 states have internal predecessors, (638), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 642 transitions. [2022-01-31 03:01:26,700 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 642 transitions. Word has length 35 [2022-01-31 03:01:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:26,700 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 642 transitions. [2022-01-31 03:01:26,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 642 transitions. [2022-01-31 03:01:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 03:01:26,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:26,700 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:26,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:26,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 03:01:26,905 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash 382085168, now seen corresponding path program 10 times [2022-01-31 03:01:26,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:26,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600001125] [2022-01-31 03:01:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:26,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 03:01:27,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600001125] [2022-01-31 03:01:27,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600001125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837878196] [2022-01-31 03:01:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:01:27,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:27,082 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:01:27,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 03:01:27,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:01:27,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:01:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 03:01:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 03:01:27,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 03:01:27,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837878196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:27,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:27,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2022-01-31 03:01:27,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506674282] [2022-01-31 03:01:27,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:27,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 03:01:27,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 03:01:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-01-31 03:01:27,324 INFO L87 Difference]: Start difference. First operand 449 states and 642 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:27,891 INFO L93 Difference]: Finished difference Result 471 states and 672 transitions. [2022-01-31 03:01:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 03:01:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 03:01:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:27,892 INFO L225 Difference]: With dead ends: 471 [2022-01-31 03:01:27,892 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 03:01:27,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 03:01:27,893 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:27,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 88 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 03:01:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 03:01:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 439. [2022-01-31 03:01:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 434 states have (on average 1.4377880184331797) internal successors, (624), 434 states have internal predecessors, (624), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 628 transitions. [2022-01-31 03:01:27,967 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 628 transitions. Word has length 36 [2022-01-31 03:01:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:27,967 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 628 transitions. [2022-01-31 03:01:27,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 628 transitions. [2022-01-31 03:01:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 03:01:27,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:27,968 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:27,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:28,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:28,184 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1568849464, now seen corresponding path program 14 times [2022-01-31 03:01:28,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:28,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933841777] [2022-01-31 03:01:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:28,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 03:01:28,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933841777] [2022-01-31 03:01:28,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933841777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097789186] [2022-01-31 03:01:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:01:28,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:28,268 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:01:28,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 03:01:28,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:01:28,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:01:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 03:01:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 03:01:28,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 03:01:28,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097789186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:28,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:28,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-31 03:01:28,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043629804] [2022-01-31 03:01:28,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:28,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 03:01:28,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 03:01:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-31 03:01:28,442 INFO L87 Difference]: Start difference. First operand 439 states and 628 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:28,683 INFO L93 Difference]: Finished difference Result 461 states and 652 transitions. [2022-01-31 03:01:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 03:01:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 03:01:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:28,685 INFO L225 Difference]: With dead ends: 461 [2022-01-31 03:01:28,685 INFO L226 Difference]: Without dead ends: 434 [2022-01-31 03:01:28,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-31 03:01:28,686 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:28,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 63 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:01:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-31 03:01:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 425. [2022-01-31 03:01:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.45) internal successors, (609), 420 states have internal predecessors, (609), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 613 transitions. [2022-01-31 03:01:28,759 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 613 transitions. Word has length 37 [2022-01-31 03:01:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:28,759 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 613 transitions. [2022-01-31 03:01:28,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 613 transitions. [2022-01-31 03:01:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 03:01:28,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:28,759 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:28,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:28,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:28,976 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1873101146, now seen corresponding path program 15 times [2022-01-31 03:01:28,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:28,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648061779] [2022-01-31 03:01:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:28,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:29,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 03:01:29,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:29,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648061779] [2022-01-31 03:01:29,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648061779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:29,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71844047] [2022-01-31 03:01:29,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:01:29,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:29,122 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:01:29,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 03:01:29,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 03:01:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:01:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 03:01:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 03:01:29,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-31 03:01:29,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71844047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:29,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:29,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12] total 31 [2022-01-31 03:01:29,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990462018] [2022-01-31 03:01:29,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:29,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 03:01:29,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 03:01:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-01-31 03:01:29,656 INFO L87 Difference]: Start difference. First operand 425 states and 613 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:31,646 INFO L93 Difference]: Finished difference Result 602 states and 814 transitions. [2022-01-31 03:01:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 03:01:31,647 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 03:01:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:31,648 INFO L225 Difference]: With dead ends: 602 [2022-01-31 03:01:31,648 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 03:01:31,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=638, Invalid=5062, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 03:01:31,649 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:31,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 110 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:01:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 03:01:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 402. [2022-01-31 03:01:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 397 states have (on average 1.4256926952141058) internal successors, (566), 397 states have internal predecessors, (566), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 570 transitions. [2022-01-31 03:01:31,718 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 570 transitions. Word has length 37 [2022-01-31 03:01:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:31,718 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 570 transitions. [2022-01-31 03:01:31,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 30 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 570 transitions. [2022-01-31 03:01:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 03:01:31,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:31,719 INFO L514 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:31,923 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1056472625, now seen corresponding path program 16 times [2022-01-31 03:01:31,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:31,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890899676] [2022-01-31 03:01:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:31,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:32,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 03:01:32,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:32,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890899676] [2022-01-31 03:01:32,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890899676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:32,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206998963] [2022-01-31 03:01:32,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:01:32,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:32,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:32,152 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:01:32,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 03:01:32,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:01:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:01:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 03:01:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 03:01:32,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 03:01:32,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206998963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:32,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:32,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-01-31 03:01:32,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896638002] [2022-01-31 03:01:32,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:32,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 03:01:32,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 03:01:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 03:01:32,768 INFO L87 Difference]: Start difference. First operand 402 states and 570 transitions. Second operand has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 41 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:48,502 WARN L228 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:22,454 WARN L228 SmtUtils]: Spent 13.46s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:50,071 WARN L228 SmtUtils]: Spent 13.41s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:18,601 WARN L228 SmtUtils]: Spent 18.44s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:45,825 WARN L228 SmtUtils]: Spent 13.76s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:03,248 WARN L228 SmtUtils]: Spent 8.53s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:20,855 WARN L228 SmtUtils]: Spent 12.86s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:39,146 WARN L228 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:52,779 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~z~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 4294967294 c_main_~z~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~z~0 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296))) is different from false [2022-01-31 03:05:16,338 WARN L228 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:05:32,262 WARN L228 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:05:54,685 WARN L228 SmtUtils]: Spent 15.88s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:06:29,094 WARN L228 SmtUtils]: Spent 7.61s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:06:45,808 WARN L228 SmtUtils]: Spent 9.43s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:09:35,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:09:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:09:35,104 INFO L93 Difference]: Finished difference Result 1327 states and 1816 transitions. [2022-01-31 03:09:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-31 03:09:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 41 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 03:09:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:09:35,107 INFO L225 Difference]: With dead ends: 1327 [2022-01-31 03:09:35,107 INFO L226 Difference]: Without dead ends: 1220 [2022-01-31 03:09:35,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28396 ImplicationChecksByTransitivity, 470.7s TimeCoverageRelationStatistics Valid=14004, Invalid=55952, Unknown=8, NotChecked=526, Total=70490 [2022-01-31 03:09:35,113 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 958 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 1776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1776 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-01-31 03:09:35,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [958 Valid, 134 Invalid, 3520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1776 Valid, 1743 Invalid, 0 Unknown, 1 Unchecked, 11.9s Time] [2022-01-31 03:09:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-01-31 03:09:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 483. [2022-01-31 03:09:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.4288702928870294) internal successors, (683), 478 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 687 transitions. [2022-01-31 03:09:35,231 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 687 transitions. Word has length 38 [2022-01-31 03:09:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:09:35,231 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 687 transitions. [2022-01-31 03:09:35,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 41 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 687 transitions. [2022-01-31 03:09:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:09:35,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:09:35,232 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:09:35,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-31 03:09:35,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:35,441 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:09:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:09:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1036634024, now seen corresponding path program 17 times [2022-01-31 03:09:35,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:09:35,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171357854] [2022-01-31 03:09:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:09:35,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:09:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:09:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:09:35,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:09:35,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171357854] [2022-01-31 03:09:35,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171357854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:09:35,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522301056] [2022-01-31 03:09:35,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:09:35,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:35,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:09:35,988 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:09:35,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-31 03:09:36,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 03:09:36,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:09:36,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-31 03:09:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:09:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:09:37,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:09:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:09:38,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522301056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:09:38,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:09:38,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 57 [2022-01-31 03:09:38,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642422328] [2022-01-31 03:09:38,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:09:38,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 03:09:38,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:09:38,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 03:09:38,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 03:09:38,520 INFO L87 Difference]: Start difference. First operand 483 states and 687 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:09:43,829 INFO L93 Difference]: Finished difference Result 503 states and 707 transitions. [2022-01-31 03:09:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 03:09:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 03:09:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:09:43,831 INFO L225 Difference]: With dead ends: 503 [2022-01-31 03:09:43,831 INFO L226 Difference]: Without dead ends: 498 [2022-01-31 03:09:43,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=418, Invalid=7414, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 03:09:43,832 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:09:43,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 214 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 03:09:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-31 03:09:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 483. [2022-01-31 03:09:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.4288702928870294) internal successors, (683), 478 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 687 transitions. [2022-01-31 03:09:43,927 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 687 transitions. Word has length 39 [2022-01-31 03:09:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:09:43,927 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 687 transitions. [2022-01-31 03:09:43,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 54 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 687 transitions. [2022-01-31 03:09:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:09:43,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:09:43,928 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:09:43,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-31 03:09:44,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-31 03:09:44,129 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:09:44,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:09:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash 680681318, now seen corresponding path program 11 times [2022-01-31 03:09:44,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:09:44,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611436655] [2022-01-31 03:09:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:09:44,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:09:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:44,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:09:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 03:09:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:09:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611436655] [2022-01-31 03:09:44,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611436655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:09:44,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629060146] [2022-01-31 03:09:44,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 03:09:44,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:44,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:09:44,336 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:09:44,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-31 03:09:45,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 03:09:45,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:09:45,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 03:09:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:09:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 03:09:45,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:09:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 03:09:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629060146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:09:46,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:09:46,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-01-31 03:09:46,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826051153] [2022-01-31 03:09:46,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:09:46,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 03:09:46,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:09:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 03:09:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 03:09:46,256 INFO L87 Difference]: Start difference. First operand 483 states and 687 transitions. Second operand has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:09:51,439 INFO L93 Difference]: Finished difference Result 811 states and 1039 transitions. [2022-01-31 03:09:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 03:09:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 03:09:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:09:51,442 INFO L225 Difference]: With dead ends: 811 [2022-01-31 03:09:51,442 INFO L226 Difference]: Without dead ends: 770 [2022-01-31 03:09:51,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4674 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2634, Invalid=12128, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 03:09:51,444 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 286 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 03:09:51,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 130 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 03:09:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-31 03:09:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 497. [2022-01-31 03:09:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 492 states have (on average 1.4227642276422765) internal successors, (700), 492 states have internal predecessors, (700), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 704 transitions. [2022-01-31 03:09:51,564 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 704 transitions. Word has length 39 [2022-01-31 03:09:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:09:51,564 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 704 transitions. [2022-01-31 03:09:51,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 704 transitions. [2022-01-31 03:09:51,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:09:51,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:09:51,565 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:09:51,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-31 03:09:51,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:51,769 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:09:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:09:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash -73295272, now seen corresponding path program 12 times [2022-01-31 03:09:51,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:09:51,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317975714] [2022-01-31 03:09:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:09:51,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:09:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:09:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 03:09:51,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:09:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317975714] [2022-01-31 03:09:51,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317975714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:09:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345273209] [2022-01-31 03:09:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:09:51,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:09:51,966 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:09:51,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-31 03:09:52,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 03:09:52,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:09:52,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 03:09:52,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:09:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 03:09:52,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:09:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 03:09:52,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345273209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:09:52,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:09:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2022-01-31 03:09:52,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028703164] [2022-01-31 03:09:52,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:09:52,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 03:09:52,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:09:52,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 03:09:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-01-31 03:09:52,337 INFO L87 Difference]: Start difference. First operand 497 states and 704 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:09:53,099 INFO L93 Difference]: Finished difference Result 528 states and 743 transitions. [2022-01-31 03:09:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 03:09:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 03:09:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:09:53,101 INFO L225 Difference]: With dead ends: 528 [2022-01-31 03:09:53,101 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 03:09:53,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 03:09:53,101 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:09:53,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 111 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 03:09:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 03:09:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 493. [2022-01-31 03:09:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 488 states have (on average 1.415983606557377) internal successors, (691), 488 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 695 transitions. [2022-01-31 03:09:53,212 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 695 transitions. Word has length 39 [2022-01-31 03:09:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:09:53,212 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 695 transitions. [2022-01-31 03:09:53,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 695 transitions. [2022-01-31 03:09:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 03:09:53,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:09:53,213 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:09:53,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-31 03:09:53,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:53,420 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:09:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:09:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2036388576, now seen corresponding path program 18 times [2022-01-31 03:09:53,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:09:53,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284171165] [2022-01-31 03:09:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:09:53,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:09:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:53,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:09:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 03:09:53,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:09:53,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284171165] [2022-01-31 03:09:53,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284171165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:09:53,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320545667] [2022-01-31 03:09:53,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:09:53,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:53,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:09:53,563 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:09:53,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-31 03:09:53,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 03:09:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:09:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 03:09:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:09:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 03:09:53,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:09:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-31 03:09:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320545667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:09:53,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:09:53,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-31 03:09:53,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914501169] [2022-01-31 03:09:53,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:09:53,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 03:09:53,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:09:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 03:09:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-31 03:09:53,795 INFO L87 Difference]: Start difference. First operand 493 states and 695 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:54,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:09:54,135 INFO L93 Difference]: Finished difference Result 520 states and 723 transitions. [2022-01-31 03:09:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 03:09:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 03:09:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:09:54,137 INFO L225 Difference]: With dead ends: 520 [2022-01-31 03:09:54,137 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 03:09:54,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-31 03:09:54,138 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:09:54,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 72 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:09:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 03:09:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 486. [2022-01-31 03:09:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.4199584199584199) internal successors, (683), 481 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 687 transitions. [2022-01-31 03:09:54,252 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 687 transitions. Word has length 40 [2022-01-31 03:09:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:09:54,252 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 687 transitions. [2022-01-31 03:09:54,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:09:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 687 transitions. [2022-01-31 03:09:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 03:09:54,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:09:54,253 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:09:54,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-31 03:09:54,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-31 03:09:54,456 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:09:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:09:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 20764672, now seen corresponding path program 13 times [2022-01-31 03:09:54,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:09:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479901512] [2022-01-31 03:09:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:09:54,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:09:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:54,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:09:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 03:09:54,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:09:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479901512] [2022-01-31 03:09:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479901512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:09:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773296545] [2022-01-31 03:09:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:09:54,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:09:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:09:54,673 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:09:54,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-31 03:09:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:09:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 03:09:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:09:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 03:09:54,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:09:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 03:09:55,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773296545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:09:55,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:09:55,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-01-31 03:09:55,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194899118] [2022-01-31 03:09:55,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:09:55,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 03:09:55,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:09:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 03:09:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 03:09:55,473 INFO L87 Difference]: Start difference. First operand 486 states and 687 transitions. Second operand has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:10:06,050 INFO L93 Difference]: Finished difference Result 931 states and 1163 transitions. [2022-01-31 03:10:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 03:10:06,051 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 03:10:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:10:06,053 INFO L225 Difference]: With dead ends: 931 [2022-01-31 03:10:06,053 INFO L226 Difference]: Without dead ends: 857 [2022-01-31 03:10:06,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6582 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3557, Invalid=16465, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 03:10:06,054 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 553 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:10:06,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 125 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 03:10:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-31 03:10:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 515. [2022-01-31 03:10:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 510 states have (on average 1.3941176470588235) internal successors, (711), 510 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 715 transitions. [2022-01-31 03:10:06,179 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 715 transitions. Word has length 40 [2022-01-31 03:10:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:10:06,179 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 715 transitions. [2022-01-31 03:10:06,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3125) internal successors, (63), 47 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 715 transitions. [2022-01-31 03:10:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 03:10:06,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:10:06,180 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:10:06,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-31 03:10:06,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-31 03:10:06,380 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:10:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:10:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 14953136, now seen corresponding path program 14 times [2022-01-31 03:10:06,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:10:06,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557740652] [2022-01-31 03:10:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:10:06,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:10:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:06,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:10:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 03:10:06,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:10:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557740652] [2022-01-31 03:10:06,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557740652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:10:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749545054] [2022-01-31 03:10:06,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:10:06,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:10:06,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:10:06,625 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:10:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-31 03:10:06,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:10:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:10:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 03:10:06,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:10:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 03:10:06,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:10:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 03:10:06,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749545054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:10:06,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:10:06,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2022-01-31 03:10:06,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558694098] [2022-01-31 03:10:06,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:10:06,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 03:10:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:10:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 03:10:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-31 03:10:06,954 INFO L87 Difference]: Start difference. First operand 515 states and 715 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:10:07,824 INFO L93 Difference]: Finished difference Result 532 states and 742 transitions. [2022-01-31 03:10:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 03:10:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 03:10:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:10:07,826 INFO L225 Difference]: With dead ends: 532 [2022-01-31 03:10:07,826 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 03:10:07,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 03:10:07,826 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:10:07,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:10:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 03:10:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 510. [2022-01-31 03:10:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.386138613861386) internal successors, (700), 505 states have internal predecessors, (700), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 704 transitions. [2022-01-31 03:10:07,954 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 704 transitions. Word has length 42 [2022-01-31 03:10:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:10:07,954 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 704 transitions. [2022-01-31 03:10:07,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 704 transitions. [2022-01-31 03:10:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 03:10:07,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:10:07,955 INFO L514 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:10:07,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-31 03:10:08,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-31 03:10:08,175 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:10:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:10:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash -356492863, now seen corresponding path program 19 times [2022-01-31 03:10:08,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:10:08,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482333775] [2022-01-31 03:10:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:10:08,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:10:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:08,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:10:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 03:10:08,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:10:08,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482333775] [2022-01-31 03:10:08,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482333775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:10:08,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528746135] [2022-01-31 03:10:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:10:08,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:10:08,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:10:08,456 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:10:08,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-31 03:10:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 03:10:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:10:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 03:10:08,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:10:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 03:10:09,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528746135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:10:09,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:10:09,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-01-31 03:10:09,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179582506] [2022-01-31 03:10:09,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:10:09,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 03:10:09,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:10:09,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 03:10:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 03:10:09,180 INFO L87 Difference]: Start difference. First operand 510 states and 704 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:26,119 WARN L228 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:10:44,249 WARN L228 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:11:29,031 WARN L228 SmtUtils]: Spent 28.75s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:11:43,153 WARN L228 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)