/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/loop-invgen/half_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:23:12,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:23:12,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:23:12,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:23:12,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:23:12,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:23:12,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:23:12,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:23:12,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:23:12,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:23:12,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:23:12,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:23:12,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:23:12,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:23:12,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:23:12,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:23:12,632 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:23:12,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:23:12,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:23:12,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:23:12,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:23:12,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:23:12,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:23:12,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:23:12,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:23:12,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:23:12,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:23:12,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:23:12,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:23:12,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:23:12,799 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:23:12,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/half_2.i [2022-01-09 22:23:12,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24d12631/2129367b238a47e3af68241399f4477d/FLAGa2513df29 [2022-01-09 22:23:13,193 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:23:13,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i [2022-01-09 22:23:13,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24d12631/2129367b238a47e3af68241399f4477d/FLAGa2513df29 [2022-01-09 22:23:13,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24d12631/2129367b238a47e3af68241399f4477d [2022-01-09 22:23:13,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:23:13,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:23:13,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:23:13,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:23:13,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:23:13,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c3ace82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13, skipping insertion in model container [2022-01-09 22:23:13,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:23:13,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:23:13,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2022-01-09 22:23:13,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:23:13,384 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:23:13,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2022-01-09 22:23:13,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:23:13,401 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:23:13,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13 WrapperNode [2022-01-09 22:23:13,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:23:13,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:23:13,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:23:13,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:23:13,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,422 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-01-09 22:23:13,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:23:13,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:23:13,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:23:13,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:23:13,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:23:13,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:23:13,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:23:13,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:23:13,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (1/1) ... [2022-01-09 22:23:13,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:23:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:13,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 22:23:13,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 22:23:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:23:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:23:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:23:13,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:23:13,535 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:23:13,536 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:23:13,615 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:23:13,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:23:13,619 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 22:23:13,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:23:13 BoogieIcfgContainer [2022-01-09 22:23:13,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:23:13,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:23:13,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:23:13,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:23:13,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:23:13" (1/3) ... [2022-01-09 22:23:13,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3f6d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:23:13, skipping insertion in model container [2022-01-09 22:23:13,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:23:13" (2/3) ... [2022-01-09 22:23:13,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3f6d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:23:13, skipping insertion in model container [2022-01-09 22:23:13,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:23:13" (3/3) ... [2022-01-09 22:23:13,627 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.i [2022-01-09 22:23:13,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:23:13,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:23:13,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:23:13,676 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:23:13,676 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:23:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:23:13,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:13,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:13,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2022-01-09 22:23:13,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:13,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602283437] [2022-01-09 22:23:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:13,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:13,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:13,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602283437] [2022-01-09 22:23:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602283437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:23:13,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:23:13,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:23:13,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299543427] [2022-01-09 22:23:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:23:13,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:23:13,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:13,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:23:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:23:13,843 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:13,854 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-01-09 22:23:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:23:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-01-09 22:23:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:13,860 INFO L225 Difference]: With dead ends: 24 [2022-01-09 22:23:13,860 INFO L226 Difference]: Without dead ends: 10 [2022-01-09 22:23:13,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:23:13,865 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:13,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:23:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-09 22:23:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-09 22:23:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-09 22:23:13,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-01-09 22:23:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:13,886 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-09 22:23:13,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-09 22:23:13,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:23:13,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:13,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:13,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:23:13,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:13,887 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2022-01-09 22:23:13,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:13,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162334334] [2022-01-09 22:23:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:13,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:13,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:13,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162334334] [2022-01-09 22:23:13,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162334334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:23:13,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:23:13,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:23:13,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687961929] [2022-01-09 22:23:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:23:13,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:23:13,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:13,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:23:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:23:13,994 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:14,054 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-01-09 22:23:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:23:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2022-01-09 22:23:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:14,059 INFO L225 Difference]: With dead ends: 18 [2022-01-09 22:23:14,059 INFO L226 Difference]: Without dead ends: 16 [2022-01-09 22:23:14,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:23:14,060 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:14,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:23:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-09 22:23:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-01-09 22:23:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-09 22:23:14,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-01-09 22:23:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:14,064 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-09 22:23:14,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-09 22:23:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 22:23:14,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:14,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:14,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:23:14,064 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2022-01-09 22:23:14,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:14,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914922364] [2022-01-09 22:23:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:14,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:14,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914922364] [2022-01-09 22:23:14,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914922364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719635194] [2022-01-09 22:23:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:14,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:14,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:14,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:14,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:23:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 22:23:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:14,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:14,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719635194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:14,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:14,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-09 22:23:14,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335711964] [2022-01-09 22:23:14,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:14,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 22:23:14,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 22:23:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:23:14,622 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:15,013 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-01-09 22:23:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-09 22:23:15,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 9 [2022-01-09 22:23:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:15,015 INFO L225 Difference]: With dead ends: 41 [2022-01-09 22:23:15,015 INFO L226 Difference]: Without dead ends: 39 [2022-01-09 22:23:15,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-01-09 22:23:15,016 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:15,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:23:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-09 22:23:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-01-09 22:23:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-09 22:23:15,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-01-09 22:23:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:15,021 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-09 22:23:15,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-09 22:23:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:23:15,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:15,022 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:15,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:15,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:15,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 2 times [2022-01-09 22:23:15,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471832834] [2022-01-09 22:23:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:15,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:15,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471832834] [2022-01-09 22:23:15,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471832834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573366685] [2022-01-09 22:23:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:23:15,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:15,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:15,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:23:15,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:23:15,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:15,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 22:23:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:15,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:15,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573366685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:15,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:15,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-09 22:23:15,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120105612] [2022-01-09 22:23:15,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 22:23:15,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 22:23:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:23:15,505 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:15,750 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-01-09 22:23:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 22:23:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 11 [2022-01-09 22:23:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:15,751 INFO L225 Difference]: With dead ends: 51 [2022-01-09 22:23:15,751 INFO L226 Difference]: Without dead ends: 49 [2022-01-09 22:23:15,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-01-09 22:23:15,752 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:15,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 85 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:23:15,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-09 22:23:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 19. [2022-01-09 22:23:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-09 22:23:15,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2022-01-09 22:23:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:15,758 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-09 22:23:15,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-09 22:23:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:23:15,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:15,759 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:15,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:15,980 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,SelfDestructingSolverStorable3 [2022-01-09 22:23:15,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2022-01-09 22:23:15,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255899512] [2022-01-09 22:23:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:15,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:16,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:16,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255899512] [2022-01-09 22:23:16,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255899512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:16,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027180346] [2022-01-09 22:23:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:16,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:16,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:16,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:16,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:23:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:16,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 22:23:16,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:16,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:23:16,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027180346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:23:16,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:23:16,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-01-09 22:23:16,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439798164] [2022-01-09 22:23:16,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:23:16,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:23:16,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:23:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:23:16,145 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:16,172 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-01-09 22:23:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:23:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2022-01-09 22:23:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:16,173 INFO L225 Difference]: With dead ends: 27 [2022-01-09 22:23:16,174 INFO L226 Difference]: Without dead ends: 19 [2022-01-09 22:23:16,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:23:16,175 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:16,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:23:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-09 22:23:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-09 22:23:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-01-09 22:23:16,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-01-09 22:23:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:16,183 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-01-09 22:23:16,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-01-09 22:23:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 22:23:16,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:16,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:16,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:16,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:16,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 1 times [2022-01-09 22:23:16,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331724731] [2022-01-09 22:23:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:16,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:16,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331724731] [2022-01-09 22:23:16,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331724731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:16,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97237742] [2022-01-09 22:23:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:16,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:16,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:16,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:16,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:23:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 22:23:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:16,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:16,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97237742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:16,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:16,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-01-09 22:23:16,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507445391] [2022-01-09 22:23:16,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:16,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 22:23:16,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 22:23:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:23:16,863 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:17,312 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-01-09 22:23:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-09 22:23:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 13 [2022-01-09 22:23:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:17,313 INFO L225 Difference]: With dead ends: 47 [2022-01-09 22:23:17,313 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 22:23:17,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 22:23:17,314 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:17,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:23:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 22:23:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2022-01-09 22:23:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-09 22:23:17,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-01-09 22:23:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:17,319 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-09 22:23:17,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-09 22:23:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 22:23:17,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:17,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:17,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:17,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:17,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 2 times [2022-01-09 22:23:17,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779480006] [2022-01-09 22:23:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:17,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:17,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:17,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779480006] [2022-01-09 22:23:17,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779480006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45659227] [2022-01-09 22:23:17,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:23:17,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:17,700 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:17,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:23:17,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:23:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 22:23:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:17,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45659227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:18,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:18,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-01-09 22:23:18,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709800117] [2022-01-09 22:23:18,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:18,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-09 22:23:18,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-09 22:23:18,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-01-09 22:23:18,207 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:18,745 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-01-09 22:23:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-09 22:23:18,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 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 17 [2022-01-09 22:23:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:18,749 INFO L225 Difference]: With dead ends: 49 [2022-01-09 22:23:18,749 INFO L226 Difference]: Without dead ends: 34 [2022-01-09 22:23:18,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 22:23:18,751 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:18,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:23:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-09 22:23:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-01-09 22:23:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-09 22:23:18,756 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-01-09 22:23:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:18,757 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-09 22:23:18,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-09 22:23:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 22:23:18,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:18,757 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:18,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:18,968 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 38169965, now seen corresponding path program 3 times [2022-01-09 22:23:18,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:18,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274864647] [2022-01-09 22:23:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:18,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:19,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274864647] [2022-01-09 22:23:19,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274864647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338913877] [2022-01-09 22:23:19,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:23:19,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:19,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:19,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:23:19,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-09 22:23:19,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 22:23:19,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:19,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:19,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338913877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:19,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-09 22:23:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907574376] [2022-01-09 22:23:19,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:19,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 22:23:19,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 22:23:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-01-09 22:23:19,416 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:19,902 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-01-09 22:23:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-09 22:23:19,902 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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 21 [2022-01-09 22:23:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:19,904 INFO L225 Difference]: With dead ends: 82 [2022-01-09 22:23:19,904 INFO L226 Difference]: Without dead ends: 80 [2022-01-09 22:23:19,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=2220, Unknown=0, NotChecked=0, Total=2970 [2022-01-09 22:23:19,907 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:19,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 105 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:23:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-09 22:23:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2022-01-09 22:23:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-01-09 22:23:19,924 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-01-09 22:23:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:19,924 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-01-09 22:23:19,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-01-09 22:23:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 22:23:19,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:19,925 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:19,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:20,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:20,141 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 4 times [2022-01-09 22:23:20,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:20,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755202068] [2022-01-09 22:23:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:20,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:20,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755202068] [2022-01-09 22:23:20,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755202068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240217002] [2022-01-09 22:23:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:23:20,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:20,305 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:20,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 22:23:20,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:23:20,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 22:23:20,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240217002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:20,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:20,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-01-09 22:23:20,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983005051] [2022-01-09 22:23:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:20,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 22:23:20,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 22:23:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-01-09 22:23:20,938 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:21,318 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-01-09 22:23:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 22:23:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 21 [2022-01-09 22:23:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:21,318 INFO L225 Difference]: With dead ends: 56 [2022-01-09 22:23:21,318 INFO L226 Difference]: Without dead ends: 38 [2022-01-09 22:23:21,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-01-09 22:23:21,319 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:21,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:23:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-09 22:23:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-09 22:23:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-01-09 22:23:21,328 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2022-01-09 22:23:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:21,329 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-01-09 22:23:21,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-01-09 22:23:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 22:23:21,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:21,329 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:21,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:21,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:21,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 5 times [2022-01-09 22:23:21,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95966898] [2022-01-09 22:23:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:21,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:21,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95966898] [2022-01-09 22:23:21,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95966898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039761807] [2022-01-09 22:23:21,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:23:21,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:21,776 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:21,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 22:23:21,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-09 22:23:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-09 22:23:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:22,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:22,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039761807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:22,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:22,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-01-09 22:23:22,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330159641] [2022-01-09 22:23:22,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:22,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 22:23:22,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 22:23:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 22:23:22,547 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:23,538 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-01-09 22:23:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-09 22:23:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 25 [2022-01-09 22:23:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:23,540 INFO L225 Difference]: With dead ends: 93 [2022-01-09 22:23:23,540 INFO L226 Difference]: Without dead ends: 72 [2022-01-09 22:23:23,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=2868, Unknown=0, NotChecked=0, Total=3422 [2022-01-09 22:23:23,541 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:23,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 81 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:23:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-09 22:23:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2022-01-09 22:23:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-09 22:23:23,551 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2022-01-09 22:23:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:23,551 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-09 22:23:23,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-09 22:23:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 22:23:23,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:23,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:23,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:23,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 22:23:23,759 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 6 times [2022-01-09 22:23:23,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:23,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810333834] [2022-01-09 22:23:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:23,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:24,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:24,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810333834] [2022-01-09 22:23:24,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810333834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:24,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031558585] [2022-01-09 22:23:24,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:23:24,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:24,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:24,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 22:23:24,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-09 22:23:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-09 22:23:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:24,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:25,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031558585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:25,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:25,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2022-01-09 22:23:25,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945072118] [2022-01-09 22:23:25,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:25,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-09 22:23:25,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-09 22:23:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2022-01-09 22:23:25,091 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:25,842 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-01-09 22:23:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-09 22:23:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 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 29 [2022-01-09 22:23:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:25,843 INFO L225 Difference]: With dead ends: 60 [2022-01-09 22:23:25,843 INFO L226 Difference]: Without dead ends: 36 [2022-01-09 22:23:25,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=493, Invalid=3167, Unknown=0, NotChecked=0, Total=3660 [2022-01-09 22:23:25,844 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:25,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 72 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:23:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-09 22:23:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-01-09 22:23:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-09 22:23:25,854 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-01-09 22:23:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:25,854 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-09 22:23:25,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-09 22:23:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 22:23:25,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:25,855 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:25,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-09 22:23:26,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:26,063 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:26,063 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 7 times [2022-01-09 22:23:26,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992720947] [2022-01-09 22:23:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:26,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:26,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:26,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992720947] [2022-01-09 22:23:26,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992720947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:26,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580153824] [2022-01-09 22:23:26,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 22:23:26,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:26,435 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:26,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 22:23:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:26,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-09 22:23:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:26,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:27,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580153824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:27,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:27,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-01-09 22:23:27,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763832340] [2022-01-09 22:23:27,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:27,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-09 22:23:27,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-09 22:23:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-01-09 22:23:27,510 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:29,037 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-01-09 22:23:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-09 22:23:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 33 [2022-01-09 22:23:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:29,038 INFO L225 Difference]: With dead ends: 93 [2022-01-09 22:23:29,038 INFO L226 Difference]: Without dead ends: 66 [2022-01-09 22:23:29,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-01-09 22:23:29,040 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 144 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:29,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 116 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 22:23:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-09 22:23:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-01-09 22:23:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-01-09 22:23:29,057 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 33 [2022-01-09 22:23:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:29,057 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-01-09 22:23:29,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-01-09 22:23:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-09 22:23:29,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:29,058 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:29,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-09 22:23:29,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 22:23:29,262 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:29,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 8 times [2022-01-09 22:23:29,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:29,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527494442] [2022-01-09 22:23:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:29,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:29,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:29,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527494442] [2022-01-09 22:23:29,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527494442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348126926] [2022-01-09 22:23:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:23:29,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:29,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:29,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:29,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 22:23:29,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:23:29,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:29,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-09 22:23:29,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:30,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348126926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:30,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:30,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-01-09 22:23:30,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340971988] [2022-01-09 22:23:30,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:30,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-09 22:23:30,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-09 22:23:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 22:23:30,953 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:32,949 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-01-09 22:23:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-09 22:23:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 37 [2022-01-09 22:23:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:32,950 INFO L225 Difference]: With dead ends: 124 [2022-01-09 22:23:32,950 INFO L226 Difference]: Without dead ends: 94 [2022-01-09 22:23:32,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1097, Invalid=6213, Unknown=0, NotChecked=0, Total=7310 [2022-01-09 22:23:32,952 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 164 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:32,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 132 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 22:23:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-09 22:23:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-01-09 22:23:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-01-09 22:23:32,996 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2022-01-09 22:23:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:32,996 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-01-09 22:23:32,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-01-09 22:23:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 22:23:33,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:33,001 INFO L514 BasicCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:33,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:33,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 22:23:33,215 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -826667923, now seen corresponding path program 9 times [2022-01-09 22:23:33,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555194825] [2022-01-09 22:23:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:33,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555194825] [2022-01-09 22:23:33,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555194825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671362328] [2022-01-09 22:23:33,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:23:33,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:33,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:33,454 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:33,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 22:23:33,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-09 22:23:33,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:33,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-09 22:23:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:34,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671362328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:34,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:34,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-01-09 22:23:34,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535393236] [2022-01-09 22:23:34,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:34,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-09 22:23:34,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:34,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-09 22:23:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-01-09 22:23:34,370 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:35,700 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2022-01-09 22:23:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-09 22:23:35,700 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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 41 [2022-01-09 22:23:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:35,701 INFO L225 Difference]: With dead ends: 266 [2022-01-09 22:23:35,701 INFO L226 Difference]: Without dead ends: 264 [2022-01-09 22:23:35,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3111, Invalid=9771, Unknown=0, NotChecked=0, Total=12882 [2022-01-09 22:23:35,705 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 397 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:35,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 219 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 22:23:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-09 22:23:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 72. [2022-01-09 22:23:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-01-09 22:23:35,746 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2022-01-09 22:23:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:35,747 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-01-09 22:23:35,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-01-09 22:23:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 22:23:35,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:35,747 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:35,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:35,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 22:23:35,961 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 10 times [2022-01-09 22:23:35,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:35,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760339843] [2022-01-09 22:23:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:35,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:36,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760339843] [2022-01-09 22:23:36,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760339843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73424449] [2022-01-09 22:23:36,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:23:36,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:36,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 22:23:36,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:23:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-09 22:23:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:36,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:37,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73424449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:37,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:37,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-01-09 22:23:37,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817220866] [2022-01-09 22:23:37,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:37,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-09 22:23:37,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-09 22:23:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 22:23:37,806 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:40,214 INFO L93 Difference]: Finished difference Result 277 states and 289 transitions. [2022-01-09 22:23:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-09 22:23:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 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 41 [2022-01-09 22:23:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:40,220 INFO L225 Difference]: With dead ends: 277 [2022-01-09 22:23:40,220 INFO L226 Difference]: Without dead ends: 244 [2022-01-09 22:23:40,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1320, Invalid=7610, Unknown=0, NotChecked=0, Total=8930 [2022-01-09 22:23:40,222 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 189 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:40,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 151 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:23:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-09 22:23:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 71. [2022-01-09 22:23:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 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) [2022-01-09 22:23:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-01-09 22:23:40,268 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 41 [2022-01-09 22:23:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:40,268 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-01-09 22:23:40,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-01-09 22:23:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-09 22:23:40,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:40,269 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:40,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:40,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-09 22:23:40,471 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 11 times [2022-01-09 22:23:40,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:40,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966181286] [2022-01-09 22:23:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:40,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966181286] [2022-01-09 22:23:40,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966181286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:40,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996073918] [2022-01-09 22:23:40,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:23:40,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:40,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:40,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:40,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 22:23:40,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-09 22:23:40,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-09 22:23:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:41,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:42,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996073918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:42,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:42,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 58 [2022-01-09 22:23:42,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489705391] [2022-01-09 22:23:42,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:42,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-09 22:23:42,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-09 22:23:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2022-01-09 22:23:42,677 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:45,611 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2022-01-09 22:23:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-09 22:23:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 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 45 [2022-01-09 22:23:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:45,613 INFO L225 Difference]: With dead ends: 268 [2022-01-09 22:23:45,613 INFO L226 Difference]: Without dead ends: 232 [2022-01-09 22:23:45,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1564, Invalid=9148, Unknown=0, NotChecked=0, Total=10712 [2022-01-09 22:23:45,614 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 204 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:45,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 22:23:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-09 22:23:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 70. [2022-01-09 22:23:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-01-09 22:23:45,669 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 45 [2022-01-09 22:23:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:45,670 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-01-09 22:23:45,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-01-09 22:23:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 22:23:45,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:45,670 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:45,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:45,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:45,879 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 12 times [2022-01-09 22:23:45,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:45,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522794571] [2022-01-09 22:23:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:45,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:46,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522794571] [2022-01-09 22:23:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522794571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351153192] [2022-01-09 22:23:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:23:46,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:46,431 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:46,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 22:23:46,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-09 22:23:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-09 22:23:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:47,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:48,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351153192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:48,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:48,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 74 [2022-01-09 22:23:48,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670136438] [2022-01-09 22:23:48,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:48,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-09 22:23:48,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-09 22:23:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=4727, Unknown=0, NotChecked=0, Total=5402 [2022-01-09 22:23:48,678 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:50,799 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-01-09 22:23:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-09 22:23:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 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 49 [2022-01-09 22:23:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:50,800 INFO L225 Difference]: With dead ends: 117 [2022-01-09 22:23:50,800 INFO L226 Difference]: Without dead ends: 78 [2022-01-09 22:23:50,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1233, Invalid=8867, Unknown=0, NotChecked=0, Total=10100 [2022-01-09 22:23:50,801 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:50,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 100 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:23:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-09 22:23:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2022-01-09 22:23:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-01-09 22:23:50,849 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2022-01-09 22:23:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:50,849 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-01-09 22:23:50,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-01-09 22:23:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-09 22:23:50,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:50,850 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:50,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-09 22:23:51,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-09 22:23:51,051 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:51,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 13 times [2022-01-09 22:23:51,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:51,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365576478] [2022-01-09 22:23:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:51,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:51,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:51,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365576478] [2022-01-09 22:23:51,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365576478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:51,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977538628] [2022-01-09 22:23:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 22:23:51,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:51,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:51,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-09 22:23:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:51,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-09 22:23:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:52,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:23:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:53,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977538628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:23:53,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:23:53,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-01-09 22:23:53,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80051898] [2022-01-09 22:23:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:23:53,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-09 22:23:53,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:23:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-09 22:23:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-01-09 22:23:53,750 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:23:57,525 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2022-01-09 22:23:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-09 22:23:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 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 53 [2022-01-09 22:23:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:23:57,527 INFO L225 Difference]: With dead ends: 232 [2022-01-09 22:23:57,527 INFO L226 Difference]: Without dead ends: 190 [2022-01-09 22:23:57,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2115, Invalid=12647, Unknown=0, NotChecked=0, Total=14762 [2022-01-09 22:23:57,533 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 261 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 22:23:57,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 243 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 22:23:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-09 22:23:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 68. [2022-01-09 22:23:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-01-09 22:23:57,575 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 53 [2022-01-09 22:23:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:23:57,575 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-01-09 22:23:57,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:23:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-01-09 22:23:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-09 22:23:57,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:23:57,576 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:23:57,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-09 22:23:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-09 22:23:57,783 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:23:57,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:23:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 14 times [2022-01-09 22:23:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:23:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430470242] [2022-01-09 22:23:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:23:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:23:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:23:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:58,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:23:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430470242] [2022-01-09 22:23:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430470242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:23:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584350927] [2022-01-09 22:23:58,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:23:58,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:23:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:23:58,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:23:58,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-09 22:23:58,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:23:58,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:23:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 82 conjunts are in the unsatisfiable core [2022-01-09 22:23:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:23:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:23:59,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:01,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584350927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:01,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:01,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 86 [2022-01-09 22:24:01,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238364773] [2022-01-09 22:24:01,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:01,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-09 22:24:01,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-09 22:24:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=6313, Unknown=0, NotChecked=0, Total=7310 [2022-01-09 22:24:01,236 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:05,785 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2022-01-09 22:24:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-09 22:24:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 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 57 [2022-01-09 22:24:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:05,786 INFO L225 Difference]: With dead ends: 205 [2022-01-09 22:24:05,786 INFO L226 Difference]: Without dead ends: 160 [2022-01-09 22:24:05,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2842, Invalid=18038, Unknown=0, NotChecked=0, Total=20880 [2022-01-09 22:24:05,788 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 290 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:05,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 269 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 22:24:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-09 22:24:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 67. [2022-01-09 22:24:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-01-09 22:24:05,846 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2022-01-09 22:24:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:05,846 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-01-09 22:24:05,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-01-09 22:24:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-09 22:24:05,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:05,847 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:05,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:06,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:06,063 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 15 times [2022-01-09 22:24:06,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:06,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663295930] [2022-01-09 22:24:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:06,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:06,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:06,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663295930] [2022-01-09 22:24:06,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663295930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:06,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922637922] [2022-01-09 22:24:06,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:24:06,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:06,820 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:06,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-09 22:24:06,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-01-09 22:24:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:24:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-09 22:24:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:08,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:09,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922637922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:09,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:09,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 92 [2022-01-09 22:24:09,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812867267] [2022-01-09 22:24:09,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-09 22:24:09,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-09 22:24:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1020, Invalid=7352, Unknown=0, NotChecked=0, Total=8372 [2022-01-09 22:24:09,947 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:24:13,108 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-01-09 22:24:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-09 22:24:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 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 61 [2022-01-09 22:24:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:24:13,112 INFO L225 Difference]: With dead ends: 116 [2022-01-09 22:24:13,112 INFO L226 Difference]: Without dead ends: 68 [2022-01-09 22:24:13,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1845, Invalid=13655, Unknown=0, NotChecked=0, Total=15500 [2022-01-09 22:24:13,114 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:24:13,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 103 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 22:24:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-09 22:24:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-01-09 22:24:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-01-09 22:24:13,162 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2022-01-09 22:24:13,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:24:13,162 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-01-09 22:24:13,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:24:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-01-09 22:24:13,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-09 22:24:13,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:24:13,163 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:24:13,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-09 22:24:13,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:13,364 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:24:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:24:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 16 times [2022-01-09 22:24:13,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:24:13,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681993482] [2022-01-09 22:24:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:24:13,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:24:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:24:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:14,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:24:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681993482] [2022-01-09 22:24:14,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681993482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:24:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514822389] [2022-01-09 22:24:14,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:24:14,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:24:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:24:14,193 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:24:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-09 22:24:14,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:24:14,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:24:14,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-09 22:24:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:24:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:15,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:24:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:24:17,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514822389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:24:17,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:24:17,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 83 [2022-01-09 22:24:17,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355311434] [2022-01-09 22:24:17,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:24:17,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-09 22:24:17,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:24:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-09 22:24:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=5807, Unknown=0, NotChecked=0, Total=6806 [2022-01-09 22:24:17,152 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 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)