/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:32:30,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:32:30,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:32:30,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:32:30,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:32:30,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:32:30,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:32:30,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:32:30,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:32:30,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:32:30,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:32:30,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:32:30,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:32:30,403 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:32:30,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:32:30,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:32:30,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:32:30,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:32:30,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:32:30,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:32:30,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:32:30,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:32:30,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:32:30,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:32:30,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:32:30,611 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:32:30,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label49.c [2022-01-09 23:32:30,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099afbf57/669f822024954071b1b582b97aa425a7/FLAGa9c7698df [2022-01-09 23:32:31,149 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:32:31,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label49.c [2022-01-09 23:32:31,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099afbf57/669f822024954071b1b582b97aa425a7/FLAGa9c7698df [2022-01-09 23:32:31,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099afbf57/669f822024954071b1b582b97aa425a7 [2022-01-09 23:32:31,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:32:31,666 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:32:31,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:32:31,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:32:31,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:32:31,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:32:31" (1/1) ... [2022-01-09 23:32:31,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46944749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:31, skipping insertion in model container [2022-01-09 23:32:31,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:32:31" (1/1) ... [2022-01-09 23:32:31,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:32:31,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:32:32,126 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label49.c[56899,56912] [2022-01-09 23:32:32,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:32:32,155 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:32:32,259 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label49.c[56899,56912] [2022-01-09 23:32:32,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:32:32,280 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:32:32,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32 WrapperNode [2022-01-09 23:32:32,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:32:32,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:32:32,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:32:32,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:32:32,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,377 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-01-09 23:32:32,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:32:32,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:32:32,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:32:32,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:32:32,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:32:32,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:32:32,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:32:32,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:32:32,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (1/1) ... [2022-01-09 23:32:32,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:32:32,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:32,492 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) [2022-01-09 23:32:32,497 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 [2022-01-09 23:32:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:32:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:32:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:32:32,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:32:32,569 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:32:32,570 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:32:33,694 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:32:33,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:32:33,708 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 23:32:33,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:32:33 BoogieIcfgContainer [2022-01-09 23:32:33,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:32:33,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:32:33,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:32:33,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:32:33,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:32:31" (1/3) ... [2022-01-09 23:32:33,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2288f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:32:33, skipping insertion in model container [2022-01-09 23:32:33,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:32:32" (2/3) ... [2022-01-09 23:32:33,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2288f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:32:33, skipping insertion in model container [2022-01-09 23:32:33,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:32:33" (3/3) ... [2022-01-09 23:32:33,717 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label49.c [2022-01-09 23:32:33,722 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:32:33,722 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:32:33,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:32:33,769 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 [2022-01-09 23:32:33,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:32:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-09 23:32:33,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:33,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:33,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash -781815326, now seen corresponding path program 1 times [2022-01-09 23:32:33,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:33,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320502787] [2022-01-09 23:32:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:33,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:32:34,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:34,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320502787] [2022-01-09 23:32:34,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320502787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:34,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:34,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:34,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063265832] [2022-01-09 23:32:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:34,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:34,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:34,325 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:35,165 INFO L93 Difference]: Finished difference Result 833 states and 1474 transitions. [2022-01-09 23:32:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-01-09 23:32:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:35,185 INFO L225 Difference]: With dead ends: 833 [2022-01-09 23:32:35,185 INFO L226 Difference]: Without dead ends: 454 [2022-01-09 23:32:35,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:35,189 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 123 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:35,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 163 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:32:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-09 23:32:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-01-09 23:32:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.55902004454343) internal successors, (700), 449 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 700 transitions. [2022-01-09 23:32:35,227 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 700 transitions. Word has length 168 [2022-01-09 23:32:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:35,228 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 700 transitions. [2022-01-09 23:32:35,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 700 transitions. [2022-01-09 23:32:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-09 23:32:35,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:35,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:35,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:32:35,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1503465326, now seen corresponding path program 1 times [2022-01-09 23:32:35,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420617720] [2022-01-09 23:32:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:35,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:32:35,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420617720] [2022-01-09 23:32:35,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420617720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:35,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:35,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:35,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477945982] [2022-01-09 23:32:35,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:35,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:35,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:35,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:35,297 INFO L87 Difference]: Start difference. First operand 450 states and 700 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:35,841 INFO L93 Difference]: Finished difference Result 1337 states and 2085 transitions. [2022-01-09 23:32:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:35,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-01-09 23:32:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:35,848 INFO L225 Difference]: With dead ends: 1337 [2022-01-09 23:32:35,848 INFO L226 Difference]: Without dead ends: 889 [2022-01-09 23:32:35,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:35,851 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:35,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-01-09 23:32:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 885. [2022-01-09 23:32:35,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.5429864253393666) internal successors, (1364), 884 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1364 transitions. [2022-01-09 23:32:35,883 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1364 transitions. Word has length 174 [2022-01-09 23:32:35,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:35,884 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1364 transitions. [2022-01-09 23:32:35,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1364 transitions. [2022-01-09 23:32:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-09 23:32:35,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:35,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:35,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:32:35,887 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1879608615, now seen corresponding path program 1 times [2022-01-09 23:32:35,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:35,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309355768] [2022-01-09 23:32:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:35,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:32:35,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309355768] [2022-01-09 23:32:35,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309355768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:35,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:35,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:35,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427438273] [2022-01-09 23:32:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:35,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:35,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:35,959 INFO L87 Difference]: Start difference. First operand 885 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:36,527 INFO L93 Difference]: Finished difference Result 2599 states and 4012 transitions. [2022-01-09 23:32:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-01-09 23:32:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:36,532 INFO L225 Difference]: With dead ends: 2599 [2022-01-09 23:32:36,532 INFO L226 Difference]: Without dead ends: 1716 [2022-01-09 23:32:36,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:36,534 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 258 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:36,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 134 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-01-09 23:32:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2022-01-09 23:32:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.4687682428488034) internal successors, (2516), 1713 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2516 transitions. [2022-01-09 23:32:36,561 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2516 transitions. Word has length 181 [2022-01-09 23:32:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2516 transitions. [2022-01-09 23:32:36,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2516 transitions. [2022-01-09 23:32:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-09 23:32:36,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:36,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:36,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:32:36,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1994125794, now seen corresponding path program 1 times [2022-01-09 23:32:36,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:36,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560232330] [2022-01-09 23:32:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:36,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:32:36,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:36,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560232330] [2022-01-09 23:32:36,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560232330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:36,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:36,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:36,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684001929] [2022-01-09 23:32:36,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:36,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:36,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:36,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:36,639 INFO L87 Difference]: Start difference. First operand 1714 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:37,197 INFO L93 Difference]: Finished difference Result 4665 states and 6865 transitions. [2022-01-09 23:32:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-01-09 23:32:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:37,206 INFO L225 Difference]: With dead ends: 4665 [2022-01-09 23:32:37,207 INFO L226 Difference]: Without dead ends: 2953 [2022-01-09 23:32:37,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:37,216 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:37,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-01-09 23:32:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2949. [2022-01-09 23:32:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 1.4189280868385346) internal successors, (4183), 2948 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4183 transitions. [2022-01-09 23:32:37,264 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4183 transitions. Word has length 181 [2022-01-09 23:32:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:37,265 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4183 transitions. [2022-01-09 23:32:37,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4183 transitions. [2022-01-09 23:32:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-09 23:32:37,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:37,269 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:37,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:32:37,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1494804173, now seen corresponding path program 1 times [2022-01-09 23:32:37,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218453608] [2022-01-09 23:32:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:37,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:32:37,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:37,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218453608] [2022-01-09 23:32:37,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218453608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:37,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:37,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:37,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674592068] [2022-01-09 23:32:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:37,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:37,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:37,352 INFO L87 Difference]: Start difference. First operand 2949 states and 4183 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:37,955 INFO L93 Difference]: Finished difference Result 8575 states and 12210 transitions. [2022-01-09 23:32:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-01-09 23:32:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:37,972 INFO L225 Difference]: With dead ends: 8575 [2022-01-09 23:32:37,972 INFO L226 Difference]: Without dead ends: 5831 [2022-01-09 23:32:37,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:37,979 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:37,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-01-09 23:32:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 5795. [2022-01-09 23:32:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 1.387124611667242) internal successors, (8037), 5794 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8037 transitions. [2022-01-09 23:32:38,068 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8037 transitions. Word has length 182 [2022-01-09 23:32:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:38,068 INFO L470 AbstractCegarLoop]: Abstraction has 5795 states and 8037 transitions. [2022-01-09 23:32:38,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8037 transitions. [2022-01-09 23:32:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-09 23:32:38,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:38,075 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:32:38,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1371584375, now seen corresponding path program 1 times [2022-01-09 23:32:38,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:38,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181874955] [2022-01-09 23:32:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:38,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-09 23:32:38,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:38,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181874955] [2022-01-09 23:32:38,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181874955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:38,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:38,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:38,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414475506] [2022-01-09 23:32:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:38,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:38,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:38,151 INFO L87 Difference]: Start difference. First operand 5795 states and 8037 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:38,829 INFO L93 Difference]: Finished difference Result 17290 states and 23986 transitions. [2022-01-09 23:32:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:38,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-01-09 23:32:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:38,858 INFO L225 Difference]: With dead ends: 17290 [2022-01-09 23:32:38,858 INFO L226 Difference]: Without dead ends: 11497 [2022-01-09 23:32:38,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:38,864 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:38,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 414 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11497 states. [2022-01-09 23:32:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11497 to 11490. [2022-01-09 23:32:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11490 states, 11489 states have (on average 1.298807555052659) internal successors, (14922), 11489 states have internal predecessors, (14922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11490 states to 11490 states and 14922 transitions. [2022-01-09 23:32:39,018 INFO L78 Accepts]: Start accepts. Automaton has 11490 states and 14922 transitions. Word has length 196 [2022-01-09 23:32:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:39,018 INFO L470 AbstractCegarLoop]: Abstraction has 11490 states and 14922 transitions. [2022-01-09 23:32:39,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 11490 states and 14922 transitions. [2022-01-09 23:32:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-09 23:32:39,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:39,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:39,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-09 23:32:39,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2049805671, now seen corresponding path program 1 times [2022-01-09 23:32:39,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898381997] [2022-01-09 23:32:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:39,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:32:39,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898381997] [2022-01-09 23:32:39,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898381997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:39,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:39,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:39,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294981431] [2022-01-09 23:32:39,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:39,102 INFO L87 Difference]: Start difference. First operand 11490 states and 14922 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:39,777 INFO L93 Difference]: Finished difference Result 30543 states and 39618 transitions. [2022-01-09 23:32:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-01-09 23:32:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:39,814 INFO L225 Difference]: With dead ends: 30543 [2022-01-09 23:32:39,814 INFO L226 Difference]: Without dead ends: 19867 [2022-01-09 23:32:39,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:39,826 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:39,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 162 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2022-01-09 23:32:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 19849. [2022-01-09 23:32:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19849 states, 19848 states have (on average 1.2677347843611446) internal successors, (25162), 19848 states have internal predecessors, (25162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19849 states to 19849 states and 25162 transitions. [2022-01-09 23:32:40,052 INFO L78 Accepts]: Start accepts. Automaton has 19849 states and 25162 transitions. Word has length 203 [2022-01-09 23:32:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:40,054 INFO L470 AbstractCegarLoop]: Abstraction has 19849 states and 25162 transitions. [2022-01-09 23:32:40,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19849 states and 25162 transitions. [2022-01-09 23:32:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-09 23:32:40,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:40,077 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:40,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-09 23:32:40,077 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1264247841, now seen corresponding path program 1 times [2022-01-09 23:32:40,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:40,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087004592] [2022-01-09 23:32:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:40,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-09 23:32:40,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087004592] [2022-01-09 23:32:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087004592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:40,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:40,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:40,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192469779] [2022-01-09 23:32:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:40,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:40,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:40,175 INFO L87 Difference]: Start difference. First operand 19849 states and 25162 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:40,860 INFO L93 Difference]: Finished difference Result 45211 states and 57514 transitions. [2022-01-09 23:32:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:40,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2022-01-09 23:32:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:40,903 INFO L225 Difference]: With dead ends: 45211 [2022-01-09 23:32:40,903 INFO L226 Difference]: Without dead ends: 25364 [2022-01-09 23:32:40,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:40,924 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 210 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:40,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 408 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25364 states. [2022-01-09 23:32:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25364 to 24516. [2022-01-09 23:32:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24516 states, 24515 states have (on average 1.2369161737711605) internal successors, (30323), 24515 states have internal predecessors, (30323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24516 states to 24516 states and 30323 transitions. [2022-01-09 23:32:41,266 INFO L78 Accepts]: Start accepts. Automaton has 24516 states and 30323 transitions. Word has length 222 [2022-01-09 23:32:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:41,266 INFO L470 AbstractCegarLoop]: Abstraction has 24516 states and 30323 transitions. [2022-01-09 23:32:41,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 24516 states and 30323 transitions. [2022-01-09 23:32:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-09 23:32:41,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:41,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:41,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-09 23:32:41,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash 669606582, now seen corresponding path program 1 times [2022-01-09 23:32:41,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:41,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205556592] [2022-01-09 23:32:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:41,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-09 23:32:41,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:41,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205556592] [2022-01-09 23:32:41,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205556592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:41,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:41,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:41,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323924844] [2022-01-09 23:32:41,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:41,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:41,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:41,355 INFO L87 Difference]: Start difference. First operand 24516 states and 30323 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:42,143 INFO L93 Difference]: Finished difference Result 53726 states and 66220 transitions. [2022-01-09 23:32:42,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:42,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-01-09 23:32:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:42,258 INFO L225 Difference]: With dead ends: 53726 [2022-01-09 23:32:42,258 INFO L226 Difference]: Without dead ends: 30227 [2022-01-09 23:32:42,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:42,274 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:42,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30227 states. [2022-01-09 23:32:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30227 to 30200. [2022-01-09 23:32:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 30199 states have (on average 1.2160336434981291) internal successors, (36723), 30199 states have internal predecessors, (36723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 36723 transitions. [2022-01-09 23:32:42,622 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 36723 transitions. Word has length 228 [2022-01-09 23:32:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:42,623 INFO L470 AbstractCegarLoop]: Abstraction has 30200 states and 36723 transitions. [2022-01-09 23:32:42,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 36723 transitions. [2022-01-09 23:32:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-09 23:32:42,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:42,652 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:42,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-09 23:32:42,652 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1174722591, now seen corresponding path program 2 times [2022-01-09 23:32:42,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:42,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842802386] [2022-01-09 23:32:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:42,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-09 23:32:42,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842802386] [2022-01-09 23:32:42,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842802386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:42,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081141101] [2022-01-09 23:32:42,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:32:42,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:42,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:42,727 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) [2022-01-09 23:32:42,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:32:42,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:32:42,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:32:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:32:42,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:32:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-09 23:32:43,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:32:43,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081141101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:43,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:32:43,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:32:43,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461957100] [2022-01-09 23:32:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:43,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:43,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:43,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:43,471 INFO L87 Difference]: Start difference. First operand 30200 states and 36723 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:44,246 INFO L93 Difference]: Finished difference Result 71360 states and 87514 transitions. [2022-01-09 23:32:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-01-09 23:32:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:44,302 INFO L225 Difference]: With dead ends: 71360 [2022-01-09 23:32:44,303 INFO L226 Difference]: Without dead ends: 41974 [2022-01-09 23:32:44,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:44,326 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 67 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:44,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 418 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41974 states. [2022-01-09 23:32:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41974 to 37299. [2022-01-09 23:32:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37299 states, 37298 states have (on average 1.1750496005147728) internal successors, (43827), 37298 states have internal predecessors, (43827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37299 states to 37299 states and 43827 transitions. [2022-01-09 23:32:44,873 INFO L78 Accepts]: Start accepts. Automaton has 37299 states and 43827 transitions. Word has length 235 [2022-01-09 23:32:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:44,873 INFO L470 AbstractCegarLoop]: Abstraction has 37299 states and 43827 transitions. [2022-01-09 23:32:44,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37299 states and 43827 transitions. [2022-01-09 23:32:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-09 23:32:44,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:44,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:44,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:32:45,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:32:45,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash 342018478, now seen corresponding path program 1 times [2022-01-09 23:32:45,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232194276] [2022-01-09 23:32:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:45,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:32:45,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232194276] [2022-01-09 23:32:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232194276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:45,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:45,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:45,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266483416] [2022-01-09 23:32:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:45,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:45,249 INFO L87 Difference]: Start difference. First operand 37299 states and 43827 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:46,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:46,048 INFO L93 Difference]: Finished difference Result 73989 states and 86943 transitions. [2022-01-09 23:32:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-01-09 23:32:46,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:46,093 INFO L225 Difference]: With dead ends: 73989 [2022-01-09 23:32:46,093 INFO L226 Difference]: Without dead ends: 37910 [2022-01-09 23:32:46,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:46,118 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:46,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 197 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:32:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37910 states. [2022-01-09 23:32:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37910 to 37908. [2022-01-09 23:32:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37908 states, 37907 states have (on average 1.173872899464479) internal successors, (44498), 37907 states have internal predecessors, (44498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37908 states to 37908 states and 44498 transitions. [2022-01-09 23:32:46,601 INFO L78 Accepts]: Start accepts. Automaton has 37908 states and 44498 transitions. Word has length 242 [2022-01-09 23:32:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:46,601 INFO L470 AbstractCegarLoop]: Abstraction has 37908 states and 44498 transitions. [2022-01-09 23:32:46,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 37908 states and 44498 transitions. [2022-01-09 23:32:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-09 23:32:46,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:46,754 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:46,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-09 23:32:46,754 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash -676956834, now seen corresponding path program 1 times [2022-01-09 23:32:46,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:46,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910134934] [2022-01-09 23:32:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:46,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-09 23:32:46,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910134934] [2022-01-09 23:32:46,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910134934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:46,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:46,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:46,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814230477] [2022-01-09 23:32:46,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:46,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:32:46,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:32:46,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:32:46,831 INFO L87 Difference]: Start difference. First operand 37908 states and 44498 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:47,866 INFO L93 Difference]: Finished difference Result 71806 states and 84458 transitions. [2022-01-09 23:32:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:32:47,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2022-01-09 23:32:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:47,912 INFO L225 Difference]: With dead ends: 71806 [2022-01-09 23:32:47,912 INFO L226 Difference]: Without dead ends: 37960 [2022-01-09 23:32:47,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:32:47,937 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 435 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:47,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 173 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:32:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37960 states. [2022-01-09 23:32:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37960 to 37096. [2022-01-09 23:32:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37096 states, 37095 states have (on average 1.175414476344521) internal successors, (43602), 37095 states have internal predecessors, (43602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37096 states to 37096 states and 43602 transitions. [2022-01-09 23:32:48,456 INFO L78 Accepts]: Start accepts. Automaton has 37096 states and 43602 transitions. Word has length 258 [2022-01-09 23:32:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 37096 states and 43602 transitions. [2022-01-09 23:32:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 37096 states and 43602 transitions. [2022-01-09 23:32:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-09 23:32:48,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:48,482 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:48,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-09 23:32:48,483 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -657621692, now seen corresponding path program 1 times [2022-01-09 23:32:48,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:48,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683498223] [2022-01-09 23:32:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:48,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 23:32:48,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:48,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683498223] [2022-01-09 23:32:48,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683498223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:48,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:48,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:48,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885595655] [2022-01-09 23:32:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:48,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:32:48,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:32:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:32:48,671 INFO L87 Difference]: Start difference. First operand 37096 states and 43602 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:49,441 INFO L93 Difference]: Finished difference Result 60091 states and 70570 transitions. [2022-01-09 23:32:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:32:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-01-09 23:32:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:49,469 INFO L225 Difference]: With dead ends: 60091 [2022-01-09 23:32:49,469 INFO L226 Difference]: Without dead ends: 27057 [2022-01-09 23:32:49,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:32:49,474 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 544 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:49,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 55 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27057 states. [2022-01-09 23:32:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27057 to 26042. [2022-01-09 23:32:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26042 states, 26041 states have (on average 1.1263008333013325) internal successors, (29330), 26041 states have internal predecessors, (29330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26042 states to 26042 states and 29330 transitions. [2022-01-09 23:32:49,770 INFO L78 Accepts]: Start accepts. Automaton has 26042 states and 29330 transitions. Word has length 263 [2022-01-09 23:32:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:49,770 INFO L470 AbstractCegarLoop]: Abstraction has 26042 states and 29330 transitions. [2022-01-09 23:32:49,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 26042 states and 29330 transitions. [2022-01-09 23:32:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-09 23:32:49,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:49,787 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:49,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-09 23:32:49,788 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash 255388899, now seen corresponding path program 1 times [2022-01-09 23:32:49,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:49,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874067696] [2022-01-09 23:32:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:49,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 112 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:32:49,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874067696] [2022-01-09 23:32:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874067696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642875166] [2022-01-09 23:32:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:49,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:49,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:49,873 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) [2022-01-09 23:32:49,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:32:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:32:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:32:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-09 23:32:50,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:32:50,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642875166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:50,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:32:50,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:32:50,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876908574] [2022-01-09 23:32:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:50,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:50,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:50,348 INFO L87 Difference]: Start difference. First operand 26042 states and 29330 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:51,020 INFO L93 Difference]: Finished difference Result 53925 states and 61162 transitions. [2022-01-09 23:32:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2022-01-09 23:32:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:51,054 INFO L225 Difference]: With dead ends: 53925 [2022-01-09 23:32:51,054 INFO L226 Difference]: Without dead ends: 32351 [2022-01-09 23:32:51,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:51,071 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 134 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32351 states. [2022-01-09 23:32:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32351 to 29295. [2022-01-09 23:32:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29295 states, 29294 states have (on average 1.1438178466580187) internal successors, (33507), 29294 states have internal predecessors, (33507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29295 states to 29295 states and 33507 transitions. [2022-01-09 23:32:51,457 INFO L78 Accepts]: Start accepts. Automaton has 29295 states and 33507 transitions. Word has length 269 [2022-01-09 23:32:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:51,457 INFO L470 AbstractCegarLoop]: Abstraction has 29295 states and 33507 transitions. [2022-01-09 23:32:51,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 29295 states and 33507 transitions. [2022-01-09 23:32:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-09 23:32:51,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:51,473 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:51,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:32:51,676 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,SelfDestructingSolverStorable13 [2022-01-09 23:32:51,677 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash -540576542, now seen corresponding path program 1 times [2022-01-09 23:32:51,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:51,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703006745] [2022-01-09 23:32:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:51,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-01-09 23:32:51,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703006745] [2022-01-09 23:32:51,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703006745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:51,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:51,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:51,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415725583] [2022-01-09 23:32:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:51,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:51,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:51,756 INFO L87 Difference]: Start difference. First operand 29295 states and 33507 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:52,476 INFO L93 Difference]: Finished difference Result 63080 states and 72172 transitions. [2022-01-09 23:32:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2022-01-09 23:32:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:52,519 INFO L225 Difference]: With dead ends: 63080 [2022-01-09 23:32:52,519 INFO L226 Difference]: Without dead ends: 38253 [2022-01-09 23:32:52,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:52,660 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:52,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 149 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38253 states. [2022-01-09 23:32:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38253 to 38248. [2022-01-09 23:32:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38248 states, 38247 states have (on average 1.1430177530263812) internal successors, (43717), 38247 states have internal predecessors, (43717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38248 states to 38248 states and 43717 transitions. [2022-01-09 23:32:53,049 INFO L78 Accepts]: Start accepts. Automaton has 38248 states and 43717 transitions. Word has length 272 [2022-01-09 23:32:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:53,049 INFO L470 AbstractCegarLoop]: Abstraction has 38248 states and 43717 transitions. [2022-01-09 23:32:53,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 2 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38248 states and 43717 transitions. [2022-01-09 23:32:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-09 23:32:53,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:53,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:53,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-09 23:32:53,067 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -162490546, now seen corresponding path program 1 times [2022-01-09 23:32:53,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:53,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56196122] [2022-01-09 23:32:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:53,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-09 23:32:53,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56196122] [2022-01-09 23:32:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56196122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:53,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:53,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:32:53,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566978570] [2022-01-09 23:32:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:53,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:32:53,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:32:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:32:53,152 INFO L87 Difference]: Start difference. First operand 38248 states and 43717 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:54,242 INFO L93 Difference]: Finished difference Result 67967 states and 77475 transitions. [2022-01-09 23:32:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:32:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2022-01-09 23:32:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:54,288 INFO L225 Difference]: With dead ends: 67967 [2022-01-09 23:32:54,288 INFO L226 Difference]: Without dead ends: 43140 [2022-01-09 23:32:54,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:32:54,307 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 357 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:54,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 129 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:32:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43140 states. [2022-01-09 23:32:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43140 to 38860. [2022-01-09 23:32:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38860 states, 38859 states have (on average 1.1427983221390154) internal successors, (44408), 38859 states have internal predecessors, (44408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38860 states to 38860 states and 44408 transitions. [2022-01-09 23:32:54,785 INFO L78 Accepts]: Start accepts. Automaton has 38860 states and 44408 transitions. Word has length 289 [2022-01-09 23:32:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:54,786 INFO L470 AbstractCegarLoop]: Abstraction has 38860 states and 44408 transitions. [2022-01-09 23:32:54,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38860 states and 44408 transitions. [2022-01-09 23:32:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-09 23:32:54,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:54,807 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:54,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-09 23:32:54,807 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2138159137, now seen corresponding path program 1 times [2022-01-09 23:32:54,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144529551] [2022-01-09 23:32:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:54,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 152 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-09 23:32:54,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144529551] [2022-01-09 23:32:54,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144529551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:32:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202687035] [2022-01-09 23:32:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:54,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:32:54,913 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) [2022-01-09 23:32:54,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:32:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:32:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:32:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:32:55,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:32:55,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202687035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:55,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:32:55,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:32:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217958563] [2022-01-09 23:32:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:55,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:55,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:55,457 INFO L87 Difference]: Start difference. First operand 38860 states and 44408 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:56,027 INFO L93 Difference]: Finished difference Result 96650 states and 110604 transitions. [2022-01-09 23:32:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317 [2022-01-09 23:32:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:56,096 INFO L225 Difference]: With dead ends: 96650 [2022-01-09 23:32:56,096 INFO L226 Difference]: Without dead ends: 62667 [2022-01-09 23:32:56,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:32:56,112 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 210 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:56,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 523 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:32:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62667 states. [2022-01-09 23:32:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62667 to 62653. [2022-01-09 23:32:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62653 states, 62652 states have (on average 1.144480623124561) internal successors, (71704), 62652 states have internal predecessors, (71704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62653 states to 62653 states and 71704 transitions. [2022-01-09 23:32:56,914 INFO L78 Accepts]: Start accepts. Automaton has 62653 states and 71704 transitions. Word has length 317 [2022-01-09 23:32:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:56,915 INFO L470 AbstractCegarLoop]: Abstraction has 62653 states and 71704 transitions. [2022-01-09 23:32:56,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 62653 states and 71704 transitions. [2022-01-09 23:32:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-09 23:32:56,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:56,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:56,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:32:57,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:32:57,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash -31806023, now seen corresponding path program 1 times [2022-01-09 23:32:57,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327964788] [2022-01-09 23:32:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:57,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:32:57,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:57,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327964788] [2022-01-09 23:32:57,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327964788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:57,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:57,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:57,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883473840] [2022-01-09 23:32:57,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:57,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:57,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:57,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:57,258 INFO L87 Difference]: Start difference. First operand 62653 states and 71704 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:32:58,152 INFO L93 Difference]: Finished difference Result 126937 states and 144741 transitions. [2022-01-09 23:32:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:32:58,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2022-01-09 23:32:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:32:58,246 INFO L225 Difference]: With dead ends: 126937 [2022-01-09 23:32:58,247 INFO L226 Difference]: Without dead ends: 68549 [2022-01-09 23:32:58,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:58,291 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 86 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:32:58,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 132 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:32:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2022-01-09 23:32:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 67119. [2022-01-09 23:32:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67119 states, 67118 states have (on average 1.1370869215411663) internal successors, (76319), 67118 states have internal predecessors, (76319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67119 states to 67119 states and 76319 transitions. [2022-01-09 23:32:59,269 INFO L78 Accepts]: Start accepts. Automaton has 67119 states and 76319 transitions. Word has length 323 [2022-01-09 23:32:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:32:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 67119 states and 76319 transitions. [2022-01-09 23:32:59,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 2 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:32:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67119 states and 76319 transitions. [2022-01-09 23:32:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-09 23:32:59,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:32:59,297 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:32:59,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-09 23:32:59,298 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:32:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:32:59,298 INFO L85 PathProgramCache]: Analyzing trace with hash 766883010, now seen corresponding path program 1 times [2022-01-09 23:32:59,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:32:59,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902428060] [2022-01-09 23:32:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:32:59,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:32:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:32:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-01-09 23:32:59,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:32:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902428060] [2022-01-09 23:32:59,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902428060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:32:59,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:32:59,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:32:59,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803873585] [2022-01-09 23:32:59,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:32:59,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:32:59,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:32:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:32:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:32:59,385 INFO L87 Difference]: Start difference. First operand 67119 states and 76319 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:33:00,356 INFO L93 Difference]: Finished difference Result 155218 states and 177152 transitions. [2022-01-09 23:33:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:33:00,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2022-01-09 23:33:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:33:00,466 INFO L225 Difference]: With dead ends: 155218 [2022-01-09 23:33:00,466 INFO L226 Difference]: Without dead ends: 94600 [2022-01-09 23:33:00,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:33:00,511 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 210 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:33:00,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 152 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:33:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94600 states. [2022-01-09 23:33:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94600 to 94592. [2022-01-09 23:33:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94592 states, 94591 states have (on average 1.1414828049180155) internal successors, (107974), 94591 states have internal predecessors, (107974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94592 states to 94592 states and 107974 transitions. [2022-01-09 23:33:01,960 INFO L78 Accepts]: Start accepts. Automaton has 94592 states and 107974 transitions. Word has length 338 [2022-01-09 23:33:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:33:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 94592 states and 107974 transitions. [2022-01-09 23:33:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 94592 states and 107974 transitions. [2022-01-09 23:33:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-09 23:33:01,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:33:01,989 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:33:01,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-09 23:33:01,989 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:33:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:33:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1600962381, now seen corresponding path program 1 times [2022-01-09 23:33:01,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:33:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811981323] [2022-01-09 23:33:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:01,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:33:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 183 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-09 23:33:02,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:33:02,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811981323] [2022-01-09 23:33:02,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811981323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:33:02,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257745666] [2022-01-09 23:33:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:02,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:33:02,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:33:02,102 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) [2022-01-09 23:33:02,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:33:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:02,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:33:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:33:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 23:33:02,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:33:02,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257745666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:33:02,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:33:02,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-01-09 23:33:02,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447472921] [2022-01-09 23:33:02,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:33:02,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:33:02,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:33:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:33:02,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:33:02,622 INFO L87 Difference]: Start difference. First operand 94592 states and 107974 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:33:03,746 INFO L93 Difference]: Finished difference Result 207722 states and 238889 transitions. [2022-01-09 23:33:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:33:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2022-01-09 23:33:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:33:04,168 INFO L225 Difference]: With dead ends: 207722 [2022-01-09 23:33:04,168 INFO L226 Difference]: Without dead ends: 116583 [2022-01-09 23:33:04,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:33:04,270 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 90 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:33:04,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 122 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:33:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116583 states. [2022-01-09 23:33:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116583 to 103546. [2022-01-09 23:33:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103546 states, 103545 states have (on average 1.1397266888792312) internal successors, (118013), 103545 states have internal predecessors, (118013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103546 states to 103546 states and 118013 transitions. [2022-01-09 23:33:05,913 INFO L78 Accepts]: Start accepts. Automaton has 103546 states and 118013 transitions. Word has length 340 [2022-01-09 23:33:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:33:05,914 INFO L470 AbstractCegarLoop]: Abstraction has 103546 states and 118013 transitions. [2022-01-09 23:33:05,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 103546 states and 118013 transitions. [2022-01-09 23:33:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-01-09 23:33:05,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:33:05,945 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:33:05,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:33:06,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:33:06,146 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:33:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:33:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1584894317, now seen corresponding path program 1 times [2022-01-09 23:33:06,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:33:06,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827375821] [2022-01-09 23:33:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:06,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:33:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-01-09 23:33:06,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:33:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827375821] [2022-01-09 23:33:06,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827375821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:33:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790916952] [2022-01-09 23:33:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:06,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:33:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:33:06,247 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) [2022-01-09 23:33:06,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:33:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:06,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:33:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:33:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-01-09 23:33:06,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:33:06,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790916952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:33:06,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:33:06,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:33:06,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642262230] [2022-01-09 23:33:06,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:33:06,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:33:06,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:33:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:33:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:33:06,824 INFO L87 Difference]: Start difference. First operand 103546 states and 118013 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:33:08,068 INFO L93 Difference]: Finished difference Result 258748 states and 294656 transitions. [2022-01-09 23:33:08,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:33:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 372 [2022-01-09 23:33:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:33:08,261 INFO L225 Difference]: With dead ends: 258748 [2022-01-09 23:33:08,262 INFO L226 Difference]: Without dead ends: 158858 [2022-01-09 23:33:08,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:33:08,283 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 191 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:33:08,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 438 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:33:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158858 states. [2022-01-09 23:33:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158858 to 158032. [2022-01-09 23:33:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158032 states, 158031 states have (on average 1.137884339148648) internal successors, (179821), 158031 states have internal predecessors, (179821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158032 states to 158032 states and 179821 transitions. [2022-01-09 23:33:10,518 INFO L78 Accepts]: Start accepts. Automaton has 158032 states and 179821 transitions. Word has length 372 [2022-01-09 23:33:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:33:10,519 INFO L470 AbstractCegarLoop]: Abstraction has 158032 states and 179821 transitions. [2022-01-09 23:33:10,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 158032 states and 179821 transitions. [2022-01-09 23:33:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-09 23:33:10,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:33:10,593 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:33:10,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-09 23:33:10,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:33:10,794 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:33:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:33:10,794 INFO L85 PathProgramCache]: Analyzing trace with hash 892022467, now seen corresponding path program 1 times [2022-01-09 23:33:10,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:33:10,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436236352] [2022-01-09 23:33:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:10,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:33:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2022-01-09 23:33:10,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:33:10,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436236352] [2022-01-09 23:33:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436236352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:33:10,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:33:10,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:33:10,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584604466] [2022-01-09 23:33:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:33:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:33:10,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:33:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:33:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:33:10,900 INFO L87 Difference]: Start difference. First operand 158032 states and 179821 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:12,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:33:12,842 INFO L93 Difference]: Finished difference Result 387466 states and 439693 transitions. [2022-01-09 23:33:12,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:33:12,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2022-01-09 23:33:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:33:13,424 INFO L225 Difference]: With dead ends: 387466 [2022-01-09 23:33:13,427 INFO L226 Difference]: Without dead ends: 230451 [2022-01-09 23:33:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:33:13,487 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 430 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 23:33:13,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 336 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-09 23:33:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230451 states. [2022-01-09 23:33:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230451 to 212172. [2022-01-09 23:33:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212172 states, 212171 states have (on average 1.1146575168142678) internal successors, (236498), 212171 states have internal predecessors, (236498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212172 states to 212172 states and 236498 transitions. [2022-01-09 23:33:16,635 INFO L78 Accepts]: Start accepts. Automaton has 212172 states and 236498 transitions. Word has length 410 [2022-01-09 23:33:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:33:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 212172 states and 236498 transitions. [2022-01-09 23:33:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 212172 states and 236498 transitions. [2022-01-09 23:33:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-09 23:33:16,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:33:16,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:33:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-09 23:33:16,708 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:33:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:33:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1158823883, now seen corresponding path program 1 times [2022-01-09 23:33:16,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:33:16,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265896926] [2022-01-09 23:33:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:16,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:33:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 23:33:17,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:33:17,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265896926] [2022-01-09 23:33:17,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265896926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:33:17,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:33:17,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:33:17,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023619001] [2022-01-09 23:33:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:33:17,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:33:17,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:33:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:33:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:33:17,130 INFO L87 Difference]: Start difference. First operand 212172 states and 236498 transitions. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:33:19,364 INFO L93 Difference]: Finished difference Result 477248 states and 534629 transitions. [2022-01-09 23:33:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:33:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 425 [2022-01-09 23:33:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:33:19,743 INFO L225 Difference]: With dead ends: 477248 [2022-01-09 23:33:19,743 INFO L226 Difference]: Without dead ends: 269544 [2022-01-09 23:33:19,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:33:19,798 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 288 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:33:19,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 486 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:33:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269544 states. [2022-01-09 23:33:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269544 to 257143. [2022-01-09 23:33:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257143 states, 257142 states have (on average 1.1256426410310256) internal successors, (289450), 257142 states have internal predecessors, (289450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257143 states to 257143 states and 289450 transitions. [2022-01-09 23:33:23,737 INFO L78 Accepts]: Start accepts. Automaton has 257143 states and 289450 transitions. Word has length 425 [2022-01-09 23:33:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:33:23,737 INFO L470 AbstractCegarLoop]: Abstraction has 257143 states and 289450 transitions. [2022-01-09 23:33:23,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 257143 states and 289450 transitions. [2022-01-09 23:33:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-09 23:33:24,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:33:24,100 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:33:24,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-09 23:33:24,101 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:33:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:33:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2015797984, now seen corresponding path program 1 times [2022-01-09 23:33:24,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:33:24,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643196648] [2022-01-09 23:33:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:24,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:33:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-09 23:33:24,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:33:24,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643196648] [2022-01-09 23:33:24,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643196648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:33:24,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301180281] [2022-01-09 23:33:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:33:24,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:33:24,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:33:24,484 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) [2022-01-09 23:33:24,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:33:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:33:24,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:33:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:33:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-01-09 23:33:25,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:33:25,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301180281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:33:25,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:33:25,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-01-09 23:33:25,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764345340] [2022-01-09 23:33:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:33:25,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:33:25,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:33:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:33:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-09 23:33:25,257 INFO L87 Difference]: Start difference. First operand 257143 states and 289450 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:33:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:33:27,530 INFO L93 Difference]: Finished difference Result 552653 states and 624520 transitions. [2022-01-09 23:33:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:33:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 465 [2022-01-09 23:33:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:33:27,971 INFO L225 Difference]: With dead ends: 552653 [2022-01-09 23:33:27,971 INFO L226 Difference]: Without dead ends: 301602