/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/Problem17_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:23:16,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:23:16,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:23:16,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 00:23:16,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 00:23:16,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 00:23:16,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 00:23:16,152 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 [2022-01-10 00:23:16,175 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:23:16,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:23:16,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:23:16,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:23:16,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:23:16,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:23:16,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:23:16,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:23:16,176 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:23:16,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:23:16,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:23:16,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:23:16,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:23:16,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:23:16,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:23:16,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:23:16,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:23:16,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:23:16,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:23:16,383 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:23:16,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label09.c [2022-01-10 00:23:16,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75cdf454/b8f21b5f8a2c4611be5b5aaf6e630590/FLAG8529d6563 [2022-01-10 00:23:16,892 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:23:16,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label09.c [2022-01-10 00:23:16,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75cdf454/b8f21b5f8a2c4611be5b5aaf6e630590/FLAG8529d6563 [2022-01-10 00:23:17,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75cdf454/b8f21b5f8a2c4611be5b5aaf6e630590 [2022-01-10 00:23:17,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:23:17,161 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:23:17,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:23:17,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:23:17,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:23:17,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:23:17" (1/1) ... [2022-01-10 00:23:17,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56705917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:17, skipping insertion in model container [2022-01-10 00:23:17,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:23:17" (1/1) ... [2022-01-10 00:23:17,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:23:17,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:23:17,445 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/Problem17_label09.c[1938,1951] [2022-01-10 00:23:18,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:23:18,202 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:23:18,220 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/Problem17_label09.c[1938,1951] [2022-01-10 00:23:18,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:23:18,453 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:23:18,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18 WrapperNode [2022-01-10 00:23:18,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:23:18,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:23:18,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:23:18,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:23:18,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,686 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-01-10 00:23:18,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:23:18,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:23:18,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:23:18,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:23:18,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:23:18,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:23:18,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:23:18,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:23:18,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (1/1) ... [2022-01-10 00:23:18,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:23:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:23:19,052 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) [2022-01-10 00:23:19,069 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 [2022-01-10 00:23:19,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:23:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:23:19,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:23:19,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:23:19,133 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:23:19,134 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:23:21,452 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:23:21,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:23:21,460 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 00:23:21,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:23:21 BoogieIcfgContainer [2022-01-10 00:23:21,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:23:21,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:23:21,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:23:21,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:23:21,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:23:17" (1/3) ... [2022-01-10 00:23:21,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c233805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:23:21, skipping insertion in model container [2022-01-10 00:23:21,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:23:18" (2/3) ... [2022-01-10 00:23:21,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c233805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:23:21, skipping insertion in model container [2022-01-10 00:23:21,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:23:21" (3/3) ... [2022-01-10 00:23:21,467 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label09.c [2022-01-10 00:23:21,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:23:21,471 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:23:21,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:23:21,520 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 [2022-01-10 00:23:21,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:23:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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) [2022-01-10 00:23:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 00:23:21,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:21,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:21,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2022-01-10 00:23:21,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:21,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633034897] [2022-01-10 00:23:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:21,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:21,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633034897] [2022-01-10 00:23:21,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633034897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:21,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:21,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:21,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145913365] [2022-01-10 00:23:21,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:21,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:21,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:21,722 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-10 00:23:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:24,060 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2022-01-10 00:23:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-01-10 00:23:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:24,074 INFO L225 Difference]: With dead ends: 1667 [2022-01-10 00:23:24,074 INFO L226 Difference]: Without dead ends: 998 [2022-01-10 00:23:24,078 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 [2022-01-10 00:23:24,080 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 533 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:24,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 00:23:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-10 00:23:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2022-01-10 00:23:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 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) [2022-01-10 00:23:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2022-01-10 00:23:24,139 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 12 [2022-01-10 00:23:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:24,139 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2022-01-10 00:23:24,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-01-10 00:23:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2022-01-10 00:23:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 00:23:24,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:24,141 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 00:23:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:23:24,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1540663647, now seen corresponding path program 1 times [2022-01-10 00:23:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:24,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392007234] [2022-01-10 00:23:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:24,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:24,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392007234] [2022-01-10 00:23:24,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392007234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:24,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:24,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:24,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285613598] [2022-01-10 00:23:24,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:24,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:24,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:24,246 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2022-01-10 00:23:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:26,305 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2022-01-10 00:23:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 77 [2022-01-10 00:23:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:26,311 INFO L225 Difference]: With dead ends: 2841 [2022-01-10 00:23:26,312 INFO L226 Difference]: Without dead ends: 1861 [2022-01-10 00:23:26,317 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 [2022-01-10 00:23:26,318 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:26,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 00:23:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-01-10 00:23:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2022-01-10 00:23:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 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) [2022-01-10 00:23:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2022-01-10 00:23:26,362 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 77 [2022-01-10 00:23:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:26,364 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2022-01-10 00:23:26,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2022-01-10 00:23:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2022-01-10 00:23:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-10 00:23:26,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:26,370 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 00:23:26,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:23:26,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash 463540948, now seen corresponding path program 1 times [2022-01-10 00:23:26,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468875677] [2022-01-10 00:23:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:26,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:26,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:26,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468875677] [2022-01-10 00:23:26,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468875677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:26,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:26,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:26,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233299401] [2022-01-10 00:23:26,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:26,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:26,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:26,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:26,570 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2022-01-10 00:23:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:28,671 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2022-01-10 00:23:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 117 [2022-01-10 00:23:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:28,680 INFO L225 Difference]: With dead ends: 4591 [2022-01-10 00:23:28,680 INFO L226 Difference]: Without dead ends: 2736 [2022-01-10 00:23:28,682 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 [2022-01-10 00:23:28,687 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:28,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 00:23:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-01-10 00:23:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2022-01-10 00:23:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 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) [2022-01-10 00:23:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2022-01-10 00:23:28,739 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 117 [2022-01-10 00:23:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:28,740 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2022-01-10 00:23:28,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2022-01-10 00:23:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2022-01-10 00:23:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-10 00:23:28,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:28,747 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 00:23:28,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:23:28,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1189236261, now seen corresponding path program 1 times [2022-01-10 00:23:28,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:28,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287474138] [2022-01-10 00:23:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:28,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:28,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287474138] [2022-01-10 00:23:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287474138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:28,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410839238] [2022-01-10 00:23:28,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:28,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:28,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:28,849 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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) [2022-01-10 00:23:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:30,452 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2022-01-10 00:23:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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 123 [2022-01-10 00:23:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:30,497 INFO L225 Difference]: With dead ends: 6709 [2022-01-10 00:23:30,498 INFO L226 Difference]: Without dead ends: 3995 [2022-01-10 00:23:30,502 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 [2022-01-10 00:23:30,506 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:30,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 00:23:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-01-10 00:23:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2022-01-10 00:23:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 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) [2022-01-10 00:23:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2022-01-10 00:23:30,554 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 123 [2022-01-10 00:23:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:30,556 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2022-01-10 00:23:30,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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) [2022-01-10 00:23:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2022-01-10 00:23:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 00:23:30,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:30,557 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:30,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 00:23:30,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash -604395729, now seen corresponding path program 1 times [2022-01-10 00:23:30,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:30,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990086762] [2022-01-10 00:23:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:30,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:30,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990086762] [2022-01-10 00:23:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990086762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:30,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:30,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 00:23:30,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977137397] [2022-01-10 00:23:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 00:23:30,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 00:23:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:23:30,682 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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) [2022-01-10 00:23:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:32,868 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2022-01-10 00:23:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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 160 [2022-01-10 00:23:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:32,881 INFO L225 Difference]: With dead ends: 8019 [2022-01-10 00:23:32,881 INFO L226 Difference]: Without dead ends: 4879 [2022-01-10 00:23:32,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:23:32,885 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:32,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 00:23:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-01-10 00:23:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2022-01-10 00:23:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 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) [2022-01-10 00:23:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2022-01-10 00:23:32,945 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 160 [2022-01-10 00:23:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:32,945 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2022-01-10 00:23:32,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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) [2022-01-10 00:23:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2022-01-10 00:23:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 00:23:32,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:32,946 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:32,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 00:23:32,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash -714630880, now seen corresponding path program 1 times [2022-01-10 00:23:32,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565185078] [2022-01-10 00:23:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:32,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 00:23:32,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:32,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565185078] [2022-01-10 00:23:32,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565185078] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:32,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:32,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:32,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756555846] [2022-01-10 00:23:32,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:32,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:32,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:32,998 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-01-10 00:23:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:34,969 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2022-01-10 00:23:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 166 [2022-01-10 00:23:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:34,987 INFO L225 Difference]: With dead ends: 12249 [2022-01-10 00:23:34,987 INFO L226 Difference]: Without dead ends: 7399 [2022-01-10 00:23:34,992 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 [2022-01-10 00:23:34,993 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 436 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:34,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 00:23:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2022-01-10 00:23:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2022-01-10 00:23:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 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) [2022-01-10 00:23:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2022-01-10 00:23:35,061 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 166 [2022-01-10 00:23:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:35,061 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2022-01-10 00:23:35,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-01-10 00:23:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2022-01-10 00:23:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-10 00:23:35,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:35,062 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:35,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 00:23:35,063 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1628723596, now seen corresponding path program 1 times [2022-01-10 00:23:35,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810594304] [2022-01-10 00:23:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:35,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 00:23:35,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:35,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810594304] [2022-01-10 00:23:35,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810594304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:35,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:35,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:35,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808749710] [2022-01-10 00:23:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:35,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:35,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:35,122 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-01-10 00:23:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:37,352 INFO L93 Difference]: Finished difference Result 12204 states and 15757 transitions. [2022-01-10 00:23:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:37,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 179 [2022-01-10 00:23:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:37,368 INFO L225 Difference]: With dead ends: 12204 [2022-01-10 00:23:37,368 INFO L226 Difference]: Without dead ends: 7380 [2022-01-10 00:23:37,374 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 [2022-01-10 00:23:37,374 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 460 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:37,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 511 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 00:23:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7380 states. [2022-01-10 00:23:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7380 to 6525. [2022-01-10 00:23:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 1.2665542611894542) internal successors, (8263), 6524 states have internal predecessors, (8263), 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) [2022-01-10 00:23:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8263 transitions. [2022-01-10 00:23:37,439 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8263 transitions. Word has length 179 [2022-01-10 00:23:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:37,439 INFO L470 AbstractCegarLoop]: Abstraction has 6525 states and 8263 transitions. [2022-01-10 00:23:37,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-01-10 00:23:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8263 transitions. [2022-01-10 00:23:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-10 00:23:37,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:37,441 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:37,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 00:23:37,441 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 456712304, now seen corresponding path program 1 times [2022-01-10 00:23:37,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:37,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683730791] [2022-01-10 00:23:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:37,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 00:23:37,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:37,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683730791] [2022-01-10 00:23:37,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683730791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:37,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:37,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:37,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845100228] [2022-01-10 00:23:37,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:37,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:37,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:37,532 INFO L87 Difference]: Start difference. First operand 6525 states and 8263 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2022-01-10 00:23:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:39,476 INFO L93 Difference]: Finished difference Result 17751 states and 22351 transitions. [2022-01-10 00:23:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:39,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 [2022-01-10 00:23:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:39,500 INFO L225 Difference]: With dead ends: 17751 [2022-01-10 00:23:39,501 INFO L226 Difference]: Without dead ends: 9951 [2022-01-10 00:23:39,508 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 [2022-01-10 00:23:39,508 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 488 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:39,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1019 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1484 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 00:23:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9951 states. [2022-01-10 00:23:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9951 to 9943. [2022-01-10 00:23:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 1.208006437336552) internal successors, (12010), 9942 states have internal predecessors, (12010), 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) [2022-01-10 00:23:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 12010 transitions. [2022-01-10 00:23:39,654 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 12010 transitions. Word has length 228 [2022-01-10 00:23:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:39,655 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 12010 transitions. [2022-01-10 00:23:39,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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) [2022-01-10 00:23:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 12010 transitions. [2022-01-10 00:23:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-10 00:23:39,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:39,657 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:39,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 00:23:39,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1907858662, now seen corresponding path program 1 times [2022-01-10 00:23:39,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:39,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769501087] [2022-01-10 00:23:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:39,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 00:23:39,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:39,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769501087] [2022-01-10 00:23:39,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769501087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:39,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:39,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:39,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550916156] [2022-01-10 00:23:39,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:39,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:39,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:39,769 INFO L87 Difference]: Start difference. First operand 9943 states and 12010 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-01-10 00:23:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:41,409 INFO L93 Difference]: Finished difference Result 20736 states and 24968 transitions. [2022-01-10 00:23:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 232 [2022-01-10 00:23:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:41,427 INFO L225 Difference]: With dead ends: 20736 [2022-01-10 00:23:41,428 INFO L226 Difference]: Without dead ends: 10795 [2022-01-10 00:23:41,436 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 [2022-01-10 00:23:41,440 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 418 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:41,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 985 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 00:23:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2022-01-10 00:23:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 10369. [2022-01-10 00:23:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 1.2040895061728396) internal successors, (12484), 10368 states have internal predecessors, (12484), 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) [2022-01-10 00:23:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 12484 transitions. [2022-01-10 00:23:41,697 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 12484 transitions. Word has length 232 [2022-01-10 00:23:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:41,697 INFO L470 AbstractCegarLoop]: Abstraction has 10369 states and 12484 transitions. [2022-01-10 00:23:41,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-01-10 00:23:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 12484 transitions. [2022-01-10 00:23:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-10 00:23:41,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:41,700 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:41,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 00:23:41,700 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash 724784780, now seen corresponding path program 1 times [2022-01-10 00:23:41,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711179695] [2022-01-10 00:23:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:41,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 158 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 00:23:41,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711179695] [2022-01-10 00:23:41,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711179695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702859097] [2022-01-10 00:23:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:41,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:23:41,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:23:41,875 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) [2022-01-10 00:23:41,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 00:23:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:42,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:23:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:23:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 158 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 00:23:42,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:23:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 00:23:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702859097] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:43,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 00:23:43,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-01-10 00:23:43,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562375138] [2022-01-10 00:23:43,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:43,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:43,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:23:43,182 INFO L87 Difference]: Start difference. First operand 10369 states and 12484 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-01-10 00:23:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:46,394 INFO L93 Difference]: Finished difference Result 30985 states and 37761 transitions. [2022-01-10 00:23:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 236 [2022-01-10 00:23:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:46,419 INFO L225 Difference]: With dead ends: 30985 [2022-01-10 00:23:46,419 INFO L226 Difference]: Without dead ends: 19753 [2022-01-10 00:23:46,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 467 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:23:46,429 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1117 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 1345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1345 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:46,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 143 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1345 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 00:23:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19753 states. [2022-01-10 00:23:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19753 to 19752. [2022-01-10 00:23:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19752 states, 19751 states have (on average 1.158321097665941) internal successors, (22878), 19751 states have internal predecessors, (22878), 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) [2022-01-10 00:23:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19752 states to 19752 states and 22878 transitions. [2022-01-10 00:23:46,644 INFO L78 Accepts]: Start accepts. Automaton has 19752 states and 22878 transitions. Word has length 236 [2022-01-10 00:23:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:46,644 INFO L470 AbstractCegarLoop]: Abstraction has 19752 states and 22878 transitions. [2022-01-10 00:23:46,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-01-10 00:23:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 19752 states and 22878 transitions. [2022-01-10 00:23:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-10 00:23:46,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:46,647 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:46,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 00:23:46,863 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 [2022-01-10 00:23:46,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1956249984, now seen corresponding path program 1 times [2022-01-10 00:23:46,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:46,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582141203] [2022-01-10 00:23:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:46,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 00:23:46,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582141203] [2022-01-10 00:23:46,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582141203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:46,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:46,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:46,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241764920] [2022-01-10 00:23:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:46,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:46,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:46,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:46,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:46,944 INFO L87 Difference]: Start difference. First operand 19752 states and 22878 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-01-10 00:23:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:48,510 INFO L93 Difference]: Finished difference Result 42479 states and 49308 transitions. [2022-01-10 00:23:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 249 [2022-01-10 00:23:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:48,564 INFO L225 Difference]: With dead ends: 42479 [2022-01-10 00:23:48,564 INFO L226 Difference]: Without dead ends: 22729 [2022-01-10 00:23:48,594 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 [2022-01-10 00:23:48,595 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 378 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:48,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 856 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:23:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22729 states. [2022-01-10 00:23:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22729 to 22303. [2022-01-10 00:23:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 1.1478342749529191) internal successors, (25599), 22302 states have internal predecessors, (25599), 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) [2022-01-10 00:23:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 25599 transitions. [2022-01-10 00:23:48,801 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 25599 transitions. Word has length 249 [2022-01-10 00:23:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:48,802 INFO L470 AbstractCegarLoop]: Abstraction has 22303 states and 25599 transitions. [2022-01-10 00:23:48,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-01-10 00:23:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 25599 transitions. [2022-01-10 00:23:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-10 00:23:48,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:48,805 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-01-10 00:23:48,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 00:23:48,805 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 360694187, now seen corresponding path program 1 times [2022-01-10 00:23:48,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406933141] [2022-01-10 00:23:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:48,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 00:23:48,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406933141] [2022-01-10 00:23:48,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406933141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:48,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:48,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:23:48,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950572832] [2022-01-10 00:23:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:48,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:48,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:23:48,922 INFO L87 Difference]: Start difference. First operand 22303 states and 25599 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2022-01-10 00:23:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:52,073 INFO L93 Difference]: Finished difference Result 56130 states and 65063 transitions. [2022-01-10 00:23:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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 [2022-01-10 00:23:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:52,112 INFO L225 Difference]: With dead ends: 56130 [2022-01-10 00:23:52,112 INFO L226 Difference]: Without dead ends: 30848 [2022-01-10 00:23:52,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:23:52,132 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 891 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:52,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 374 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-10 00:23:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30848 states. [2022-01-10 00:23:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30848 to 29526. [2022-01-10 00:23:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 1.159424216765453) internal successors, (34232), 29525 states have internal predecessors, (34232), 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) [2022-01-10 00:23:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 34232 transitions. [2022-01-10 00:23:52,580 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 34232 transitions. Word has length 272 [2022-01-10 00:23:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 29526 states and 34232 transitions. [2022-01-10 00:23:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 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) [2022-01-10 00:23:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 34232 transitions. [2022-01-10 00:23:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-10 00:23:52,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:52,583 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-01-10 00:23:52,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 00:23:52,584 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 716024662, now seen corresponding path program 1 times [2022-01-10 00:23:52,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763658679] [2022-01-10 00:23:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:52,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 00:23:52,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763658679] [2022-01-10 00:23:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763658679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:52,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:52,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:52,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384713763] [2022-01-10 00:23:52,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:52,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:52,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:52,679 INFO L87 Difference]: Start difference. First operand 29526 states and 34232 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2022-01-10 00:23:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:54,695 INFO L93 Difference]: Finished difference Result 74398 states and 86009 transitions. [2022-01-10 00:23:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 287 [2022-01-10 00:23:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:54,747 INFO L225 Difference]: With dead ends: 74398 [2022-01-10 00:23:54,747 INFO L226 Difference]: Without dead ends: 41896 [2022-01-10 00:23:54,759 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 [2022-01-10 00:23:54,760 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 363 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:54,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 808 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 00:23:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41896 states. [2022-01-10 00:23:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41896 to 41037. [2022-01-10 00:23:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41037 states, 41036 states have (on average 1.1224047178087533) internal successors, (46059), 41036 states have internal predecessors, (46059), 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) [2022-01-10 00:23:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41037 states to 41037 states and 46059 transitions. [2022-01-10 00:23:55,175 INFO L78 Accepts]: Start accepts. Automaton has 41037 states and 46059 transitions. Word has length 287 [2022-01-10 00:23:55,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:55,176 INFO L470 AbstractCegarLoop]: Abstraction has 41037 states and 46059 transitions. [2022-01-10 00:23:55,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2022-01-10 00:23:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41037 states and 46059 transitions. [2022-01-10 00:23:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 00:23:55,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:55,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:55,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 00:23:55,321 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 541840298, now seen corresponding path program 1 times [2022-01-10 00:23:55,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:55,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004813521] [2022-01-10 00:23:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:55,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 238 proven. 214 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 00:23:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:55,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004813521] [2022-01-10 00:23:55,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004813521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74394453] [2022-01-10 00:23:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:55,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:23:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:23:55,512 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) [2022-01-10 00:23:55,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 00:23:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:55,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:23:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:23:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 299 proven. 73 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 00:23:56,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:23:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 00:23:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74394453] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:57,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 00:23:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-01-10 00:23:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206662713] [2022-01-10 00:23:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:57,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:23:57,004 INFO L87 Difference]: Start difference. First operand 41037 states and 46059 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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) [2022-01-10 00:24:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:24:00,172 INFO L93 Difference]: Finished difference Result 97844 states and 109929 transitions. [2022-01-10 00:24:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:24:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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 310 [2022-01-10 00:24:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:24:00,229 INFO L225 Difference]: With dead ends: 97844 [2022-01-10 00:24:00,229 INFO L226 Difference]: Without dead ends: 56809 [2022-01-10 00:24:00,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:24:00,244 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 851 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:24:00,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 201 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-10 00:24:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56809 states. [2022-01-10 00:24:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56809 to 53829. [2022-01-10 00:24:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53829 states, 53828 states have (on average 1.126216838819945) internal successors, (60622), 53828 states have internal predecessors, (60622), 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) [2022-01-10 00:24:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53829 states to 53829 states and 60622 transitions. [2022-01-10 00:24:00,926 INFO L78 Accepts]: Start accepts. Automaton has 53829 states and 60622 transitions. Word has length 310 [2022-01-10 00:24:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:24:00,927 INFO L470 AbstractCegarLoop]: Abstraction has 53829 states and 60622 transitions. [2022-01-10 00:24:00,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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) [2022-01-10 00:24:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 53829 states and 60622 transitions. [2022-01-10 00:24:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-10 00:24:00,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:24:00,930 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:24:00,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 00:24:01,147 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 [2022-01-10 00:24:01,147 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:24:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:24:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2012085875, now seen corresponding path program 1 times [2022-01-10 00:24:01,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:24:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141348528] [2022-01-10 00:24:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:24:01,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:24:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:24:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-01-10 00:24:01,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:24:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141348528] [2022-01-10 00:24:01,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141348528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:24:01,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:24:01,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:24:01,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354452894] [2022-01-10 00:24:01,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:24:01,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:24:01,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:24:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:24:01,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:24:01,322 INFO L87 Difference]: Start difference. First operand 53829 states and 60622 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-01-10 00:24:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:24:03,036 INFO L93 Difference]: Finished difference Result 115335 states and 130060 transitions. [2022-01-10 00:24:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:24:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 324 [2022-01-10 00:24:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:24:03,108 INFO L225 Difference]: With dead ends: 115335 [2022-01-10 00:24:03,108 INFO L226 Difference]: Without dead ends: 61078 [2022-01-10 00:24:03,132 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 [2022-01-10 00:24:03,133 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 504 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:24:03,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 310 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:24:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61078 states. [2022-01-10 00:24:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61078 to 59370. [2022-01-10 00:24:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59370 states, 59369 states have (on average 1.1245262679176) internal successors, (66762), 59369 states have internal predecessors, (66762), 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) [2022-01-10 00:24:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59370 states to 59370 states and 66762 transitions. [2022-01-10 00:24:03,892 INFO L78 Accepts]: Start accepts. Automaton has 59370 states and 66762 transitions. Word has length 324 [2022-01-10 00:24:03,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:24:03,892 INFO L470 AbstractCegarLoop]: Abstraction has 59370 states and 66762 transitions. [2022-01-10 00:24:03,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-01-10 00:24:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 59370 states and 66762 transitions. [2022-01-10 00:24:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-01-10 00:24:03,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:24:03,896 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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, 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] [2022-01-10 00:24:03,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 00:24:03,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:24:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:24:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1022421116, now seen corresponding path program 1 times [2022-01-10 00:24:03,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:24:03,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459024012] [2022-01-10 00:24:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:24:03,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:24:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:24:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-10 00:24:04,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:24:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459024012] [2022-01-10 00:24:04,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459024012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:24:04,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:24:04,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:24:04,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587387241] [2022-01-10 00:24:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:24:04,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:24:04,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:24:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:24:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:24:04,073 INFO L87 Difference]: Start difference. First operand 59370 states and 66762 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) [2022-01-10 00:24:06,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:24:06,037 INFO L93 Difference]: Finished difference Result 134905 states and 151659 transitions. [2022-01-10 00:24:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:24:06,038 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 340 [2022-01-10 00:24:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:24:06,128 INFO L225 Difference]: With dead ends: 134905 [2022-01-10 00:24:06,128 INFO L226 Difference]: Without dead ends: 72558 [2022-01-10 00:24:06,151 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 [2022-01-10 00:24:06,151 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 383 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:24:06,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 834 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:24:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72558 states. [2022-01-10 00:24:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72558 to 61033. [2022-01-10 00:24:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61033 states, 61032 states have (on average 1.1192489186000787) internal successors, (68310), 61032 states have internal predecessors, (68310), 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) [2022-01-10 00:24:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61033 states to 61033 states and 68310 transitions. [2022-01-10 00:24:06,981 INFO L78 Accepts]: Start accepts. Automaton has 61033 states and 68310 transitions. Word has length 340 [2022-01-10 00:24:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:24:06,982 INFO L470 AbstractCegarLoop]: Abstraction has 61033 states and 68310 transitions. [2022-01-10 00:24:06,982 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) [2022-01-10 00:24:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 61033 states and 68310 transitions. [2022-01-10 00:24:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-10 00:24:06,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:24:06,986 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:24:06,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 00:24:06,986 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:24:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:24:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash 4203890, now seen corresponding path program 1 times [2022-01-10 00:24:06,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:24:06,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822476114] [2022-01-10 00:24:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:24:06,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:24:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:24:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-01-10 00:24:07,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:24:07,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822476114] [2022-01-10 00:24:07,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822476114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:24:07,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:24:07,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:24:07,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085499813] [2022-01-10 00:24:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:24:07,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:24:07,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:24:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:24:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:24:07,154 INFO L87 Difference]: Start difference. First operand 61033 states and 68310 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2022-01-10 00:24:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:24:09,348 INFO L93 Difference]: Finished difference Result 137375 states and 153487 transitions. [2022-01-10 00:24:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:24:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 345 [2022-01-10 00:24:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:24:09,439 INFO L225 Difference]: With dead ends: 137375 [2022-01-10 00:24:09,439 INFO L226 Difference]: Without dead ends: 71232 [2022-01-10 00:24:09,456 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 [2022-01-10 00:24:09,458 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 482 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:24:09,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 724 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 00:24:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71232 states. [2022-01-10 00:24:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71232 to 71223. [2022-01-10 00:24:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71223 states, 71222 states have (on average 1.0991968773693521) internal successors, (78287), 71222 states have internal predecessors, (78287), 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) [2022-01-10 00:24:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71223 states to 71223 states and 78287 transitions. [2022-01-10 00:24:10,376 INFO L78 Accepts]: Start accepts. Automaton has 71223 states and 78287 transitions. Word has length 345 [2022-01-10 00:24:10,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:24:10,376 INFO L470 AbstractCegarLoop]: Abstraction has 71223 states and 78287 transitions. [2022-01-10 00:24:10,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2022-01-10 00:24:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 71223 states and 78287 transitions. [2022-01-10 00:24:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-10 00:24:10,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:24:10,381 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:24:10,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 00:24:10,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:24:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:24:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1918113595, now seen corresponding path program 1 times [2022-01-10 00:24:10,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:24:10,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443261422] [2022-01-10 00:24:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:24:10,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:24:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:24:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 00:24:10,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:24:10,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443261422] [2022-01-10 00:24:10,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443261422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:24:10,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:24:10,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:24:10,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975806809] [2022-01-10 00:24:10,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:24:10,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:24:10,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:24:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:24:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:24:10,474 INFO L87 Difference]: Start difference. First operand 71223 states and 78287 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-01-10 00:24:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:24:12,715 INFO L93 Difference]: Finished difference Result 157773 states and 173760 transitions. [2022-01-10 00:24:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:24:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 358 [2022-01-10 00:24:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:24:12,822 INFO L225 Difference]: With dead ends: 157773 [2022-01-10 00:24:12,822 INFO L226 Difference]: Without dead ends: 86552 [2022-01-10 00:24:12,847 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 [2022-01-10 00:24:12,847 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 412 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:24:12,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 299 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 00:24:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86552 states. [2022-01-10 00:24:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86552 to 79305. [2022-01-10 00:24:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79305 states, 79304 states have (on average 1.0928956925249673) internal successors, (86671), 79304 states have internal predecessors, (86671), 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) [2022-01-10 00:24:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79305 states to 79305 states and 86671 transitions. [2022-01-10 00:24:13,893 INFO L78 Accepts]: Start accepts. Automaton has 79305 states and 86671 transitions. Word has length 358 [2022-01-10 00:24:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:24:13,894 INFO L470 AbstractCegarLoop]: Abstraction has 79305 states and 86671 transitions. [2022-01-10 00:24:13,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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) [2022-01-10 00:24:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79305 states and 86671 transitions. [2022-01-10 00:24:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-01-10 00:24:13,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:24:13,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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, 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] [2022-01-10 00:24:13,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 00:24:13,899 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:24:13,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:24:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1419132856, now seen corresponding path program 1 times [2022-01-10 00:24:13,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:24:13,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652784205] [2022-01-10 00:24:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:24:13,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:24:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:24:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 244 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-01-10 00:24:14,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:24:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652784205] [2022-01-10 00:24:14,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652784205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:24:14,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340349491] [2022-01-10 00:24:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:24:14,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:24:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:24:14,027 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) [2022-01-10 00:24:14,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 00:24:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:24:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 00:24:14,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:24:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 349 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 00:24:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:24:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 349 proven. 82 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 00:24:16,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340349491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:24:16,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:24:16,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-01-10 00:24:16,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721693138] [2022-01-10 00:24:16,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:24:16,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 00:24:16,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:24:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 00:24:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 00:24:16,502 INFO L87 Difference]: Start difference. First operand 79305 states and 86671 transitions. Second operand has 9 states, 9 states have (on average 78.55555555555556) internal successors, (707), 9 states have internal predecessors, (707), 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)