/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/array-industry-pattern/array_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:02:12,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:02:12,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:02:13,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:02:13,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:02:13,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:02:13,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:02:13,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:02:13,132 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:02:13,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:02:13,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:02:13,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:02:13,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:02:13,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:02:13,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:02:13,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:02:13,135 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:02:13,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:02:13,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:02:13,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:02:13,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:02:13,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:02:13,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:02:13,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:02:13,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:02:13,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:02:13,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:02:13,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:02:13,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:02:13,138 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:02:13,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:02:13,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:02:13,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:02:13,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:02:13,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:02:13,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:02:13,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:02:13,361 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:02:13,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2022-01-09 23:02:13,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862337b57/cc63957603f4484ba51585bffd714551/FLAGf70b5d369 [2022-01-09 23:02:13,788 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:02:13,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2022-01-09 23:02:13,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862337b57/cc63957603f4484ba51585bffd714551/FLAGf70b5d369 [2022-01-09 23:02:13,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862337b57/cc63957603f4484ba51585bffd714551 [2022-01-09 23:02:13,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:02:13,809 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:02:13,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:02:13,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:02:13,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:02:13,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:02:13" (1/1) ... [2022-01-09 23:02:13,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63527150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:13, skipping insertion in model container [2022-01-09 23:02:13,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:02:13" (1/1) ... [2022-01-09 23:02:13,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:02:13,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:02:13,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i[809,822] [2022-01-09 23:02:13,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:02:13,998 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:02:14,012 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i[809,822] [2022-01-09 23:02:14,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:02:14,035 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:02:14,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14 WrapperNode [2022-01-09 23:02:14,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:02:14,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:02:14,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:02:14,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:02:14,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,067 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-01-09 23:02:14,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:02:14,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:02:14,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:02:14,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:02:14,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:02:14,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:02:14,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:02:14,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:02:14,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (1/1) ... [2022-01-09 23:02:14,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:02:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:14,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 23:02:14,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 23:02:14,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:02:14,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:02:14,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:02:14,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:02:14,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:02:14,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:02:14,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:02:14,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:02:14,221 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:02:14,222 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:02:14,311 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:02:14,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:02:14,316 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 23:02:14,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:02:14 BoogieIcfgContainer [2022-01-09 23:02:14,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:02:14,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:02:14,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:02:14,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:02:14,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:02:13" (1/3) ... [2022-01-09 23:02:14,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd7290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:02:14, skipping insertion in model container [2022-01-09 23:02:14,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:02:14" (2/3) ... [2022-01-09 23:02:14,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd7290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:02:14, skipping insertion in model container [2022-01-09 23:02:14,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:02:14" (3/3) ... [2022-01-09 23:02:14,342 INFO L111 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2022-01-09 23:02:14,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:02:14,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:02:14,383 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:02:14,389 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 23:02:14,390 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:02:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 23:02:14,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:14,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:14,405 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2022-01-09 23:02:14,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:14,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041517476] [2022-01-09 23:02:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:14,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:14,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041517476] [2022-01-09 23:02:14,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041517476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:14,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:14,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:02:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787833162] [2022-01-09 23:02:14,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:14,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:02:14,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:02:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:02:14,627 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 23:02:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:14,637 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-01-09 23:02:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:02:14,638 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 23:02:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:14,643 INFO L225 Difference]: With dead ends: 26 [2022-01-09 23:02:14,643 INFO L226 Difference]: Without dead ends: 10 [2022-01-09 23:02:14,646 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 23:02:14,649 INFO L933 BasicCegarLoop]: 17 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, 17 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 23:02:14,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-09 23:02:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-09 23:02:14,671 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 23:02:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-09 23:02:14,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-01-09 23:02:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:14,673 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-09 23:02:14,673 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 23:02:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-09 23:02:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 23:02:14,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:14,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:14,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:02:14,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2022-01-09 23:02:14,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:14,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603026533] [2022-01-09 23:02:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:14,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603026533] [2022-01-09 23:02:14,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603026533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:02:14,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:02:14,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:02:14,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232449911] [2022-01-09 23:02:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:02:14,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:02:14,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:02:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:02:14,730 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 23:02:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:14,745 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-01-09 23:02:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:02:14,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 23:02:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:14,746 INFO L225 Difference]: With dead ends: 17 [2022-01-09 23:02:14,747 INFO L226 Difference]: Without dead ends: 11 [2022-01-09 23:02:14,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:02:14,748 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:14,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-09 23:02:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-09 23:02:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-09 23:02:14,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-01-09 23:02:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:14,752 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-09 23:02:14,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 23:02:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-09 23:02:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 23:02:14,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:14,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:14,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:02:14,754 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:14,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:14,755 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2022-01-09 23:02:14,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:14,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081888327] [2022-01-09 23:02:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:14,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:14,933 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 23:02:14,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081888327] [2022-01-09 23:02:14,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081888327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419330690] [2022-01-09 23:02:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:14,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:14,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:14,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:02:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:15,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 23:02:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:15,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-09 23:02:15,144 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 23:02:15,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:15,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-01-09 23:02:15,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-09 23:02:15,242 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 23:02:15,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419330690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:15,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:15,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-09 23:02:15,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602359223] [2022-01-09 23:02:15,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:15,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 23:02:15,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 23:02:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-09 23:02:15,245 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 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 23:02:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:15,329 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-01-09 23:02:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:02:15,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 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) Word has length 9 [2022-01-09 23:02:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:15,330 INFO L225 Difference]: With dead ends: 17 [2022-01-09 23:02:15,330 INFO L226 Difference]: Without dead ends: 15 [2022-01-09 23:02:15,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-09 23:02:15,332 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:15,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-09 23:02:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-01-09 23:02:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-01-09 23:02:15,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-01-09 23:02:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:15,337 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-01-09 23:02:15,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 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 23:02:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-01-09 23:02:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:02:15,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:15,338 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:15,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:15,559 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 23:02:15,560 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2022-01-09 23:02:15,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:15,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139286434] [2022-01-09 23:02:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:15,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:15,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:15,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139286434] [2022-01-09 23:02:15,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139286434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370973225] [2022-01-09 23:02:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:15,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:15,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:15,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:02:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:15,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:02:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:15,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:15,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370973225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:15,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:15,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-09 23:02:15,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024358085] [2022-01-09 23:02:15,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:15,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:02:15,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:02:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:02:15,865 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 23:02:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:15,930 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-01-09 23:02:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:02:15,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) Word has length 12 [2022-01-09 23:02:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:15,933 INFO L225 Difference]: With dead ends: 30 [2022-01-09 23:02:15,933 INFO L226 Difference]: Without dead ends: 20 [2022-01-09 23:02:15,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-09 23:02:15,939 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:15,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-09 23:02:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2022-01-09 23:02:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-01-09 23:02:15,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2022-01-09 23:02:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:15,950 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-01-09 23:02:15,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 23:02:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-01-09 23:02:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 23:02:15,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:15,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:15,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:16,168 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 23:02:16,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2022-01-09 23:02:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:16,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187011771] [2022-01-09 23:02:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:16,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:16,305 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 23:02:16,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187011771] [2022-01-09 23:02:16,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187011771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:16,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266819057] [2022-01-09 23:02:16,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:16,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:16,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:16,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:16,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:02:16,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:02:16,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:16,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:16,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:16,493 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 23:02:16,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:16,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:16,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:16,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:16,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:16,621 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 23:02:16,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266819057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:16,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:16,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-09 23:02:16,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390001204] [2022-01-09 23:02:16,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:16,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:02:16,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:02:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:02:16,624 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:16,737 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-01-09 23:02:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:02:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 23:02:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:16,739 INFO L225 Difference]: With dead ends: 21 [2022-01-09 23:02:16,739 INFO L226 Difference]: Without dead ends: 19 [2022-01-09 23:02:16,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-09 23:02:16,740 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:16,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-09 23:02:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-09 23:02:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-01-09 23:02:16,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-01-09 23:02:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:16,746 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-01-09 23:02:16,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-01-09 23:02:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-09 23:02:16,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:16,747 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:16,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-09 23:02:16,970 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 23:02:16,970 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2022-01-09 23:02:16,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:16,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646280957] [2022-01-09 23:02:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:16,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:17,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646280957] [2022-01-09 23:02:17,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646280957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660662688] [2022-01-09 23:02:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:17,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:17,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:17,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:02:17,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:02:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:02:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:17,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660662688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:17,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:17,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-09 23:02:17,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103407247] [2022-01-09 23:02:17,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:17,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:02:17,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:02:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:02:17,227 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 23:02:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:17,306 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-01-09 23:02:17,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:02:17,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 16 [2022-01-09 23:02:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:17,307 INFO L225 Difference]: With dead ends: 37 [2022-01-09 23:02:17,307 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 23:02:17,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:02:17,308 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:17,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 23:02:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-01-09 23:02:17,311 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 23:02:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-09 23:02:17,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-09 23:02:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:17,312 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-09 23:02:17,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 23:02:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-09 23:02:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:02:17,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:17,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:17,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-09 23:02:17,535 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 23:02:17,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2022-01-09 23:02:17,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475143583] [2022-01-09 23:02:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:17,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:17,718 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 23:02:17,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:17,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475143583] [2022-01-09 23:02:17,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475143583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876911435] [2022-01-09 23:02:17,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:02:17,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:17,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:17,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:02:17,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:02:17,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:17,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 23:02:17,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:17,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:17,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:17,936 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 23:02:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:18,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:18,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:18,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:18,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:18,059 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 23:02:18,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876911435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:18,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:18,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-01-09 23:02:18,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973806548] [2022-01-09 23:02:18,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:02:18,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:02:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:02:18,061 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,212 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-09 23:02:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 23:02:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 23:02:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,214 INFO L225 Difference]: With dead ends: 25 [2022-01-09 23:02:18,215 INFO L226 Difference]: Without dead ends: 23 [2022-01-09 23:02:18,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:02:18,216 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-09 23:02:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-09 23:02:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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 23:02:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-09 23:02:18,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-01-09 23:02:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,223 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-09 23:02:18,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-09 23:02:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:02:18,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,224 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,246 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 23:02:18,446 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 23:02:18,447 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2022-01-09 23:02:18,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:18,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543806808] [2022-01-09 23:02:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:18,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:18,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543806808] [2022-01-09 23:02:18,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543806808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699323643] [2022-01-09 23:02:18,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:02:18,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:18,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:18,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:02:18,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-09 23:02:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 23:02:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:18,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:18,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699323643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:18,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:18,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-09 23:02:18,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359653821] [2022-01-09 23:02:18,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:18,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-09 23:02:18,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-09 23:02:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:02:18,768 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 23:02:18,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:18,847 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-01-09 23:02:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:02:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) Word has length 20 [2022-01-09 23:02:18,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:18,850 INFO L225 Difference]: With dead ends: 44 [2022-01-09 23:02:18,850 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 23:02:18,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:02:18,851 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:18,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:02:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 23:02:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-01-09 23:02:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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 23:02:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-01-09 23:02:18,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-01-09 23:02:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-01-09 23:02:18,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 23:02:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-01-09 23:02:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 23:02:18,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:18,861 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:18,892 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 23:02:19,083 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 23:02:19,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2022-01-09 23:02:19,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:19,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753717030] [2022-01-09 23:02:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:19,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:19,247 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 23:02:19,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:19,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753717030] [2022-01-09 23:02:19,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753717030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:19,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37045639] [2022-01-09 23:02:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:02:19,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:19,252 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 23:02:19,256 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 23:02:19,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-09 23:02:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-09 23:02:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:19,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-09 23:02:19,607 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-09 23:02:19,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-01-09 23:02:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:19,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:19,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-09 23:02:20,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-01-09 23:02:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:20,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37045639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:20,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:20,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-01-09 23:02:20,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47916470] [2022-01-09 23:02:20,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:20,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 23:02:20,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 23:02:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:02:20,192 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 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 23:02:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:20,768 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-01-09 23:02:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-09 23:02:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 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 23:02:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:20,769 INFO L225 Difference]: With dead ends: 44 [2022-01-09 23:02:20,769 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 23:02:20,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=2377, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:02:20,771 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:20,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 224 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-01-09 23:02:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 23:02:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-01-09 23:02:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-09 23:02:20,776 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2022-01-09 23:02:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:20,776 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-09 23:02:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 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 23:02:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-09 23:02:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 23:02:20,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:20,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:20,803 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 23:02:20,991 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 23:02:20,992 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 7 times [2022-01-09 23:02:20,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:20,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249410011] [2022-01-09 23:02:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:20,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:21,202 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 23:02:21,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249410011] [2022-01-09 23:02:21,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249410011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140646608] [2022-01-09 23:02:21,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:02:21,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:21,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:21,204 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 23:02:21,206 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 23:02:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:21,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 23:02:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:21,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:21,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:21,497 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 23:02:21,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:21,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:21,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:21,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:21,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:21,690 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 23:02:21,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140646608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:21,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:21,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2022-01-09 23:02:21,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601651473] [2022-01-09 23:02:21,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:21,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-09 23:02:21,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-09 23:02:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:02:21,693 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:21,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:21,943 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-01-09 23:02:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-09 23:02:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 23:02:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:21,944 INFO L225 Difference]: With dead ends: 33 [2022-01-09 23:02:21,944 INFO L226 Difference]: Without dead ends: 31 [2022-01-09 23:02:21,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-09 23:02:21,945 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:21,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 98 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-09 23:02:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-09 23:02:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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 23:02:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-01-09 23:02:21,961 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2022-01-09 23:02:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:21,961 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-01-09 23:02:21,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-01-09 23:02:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:02:21,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:21,962 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:21,989 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 23:02:22,175 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 23:02:22,176 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 8 times [2022-01-09 23:02:22,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:22,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677547276] [2022-01-09 23:02:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:22,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:22,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677547276] [2022-01-09 23:02:22,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677547276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940950973] [2022-01-09 23:02:22,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:22,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:22,280 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 23:02:22,288 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 23:02:22,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:22,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:22,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-09 23:02:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:22,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:22,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940950973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:22,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:22,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-01-09 23:02:22,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940863102] [2022-01-09 23:02:22,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-09 23:02:22,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-09 23:02:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:02:22,567 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:22,670 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-01-09 23:02:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-09 23:02:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 28 [2022-01-09 23:02:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:22,672 INFO L225 Difference]: With dead ends: 58 [2022-01-09 23:02:22,672 INFO L226 Difference]: Without dead ends: 36 [2022-01-09 23:02:22,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:02:22,674 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:22,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-09 23:02:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-01-09 23:02:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-09 23:02:22,681 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2022-01-09 23:02:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:22,681 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-09 23:02:22,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-09 23:02:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 23:02:22,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:22,683 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:22,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:22,903 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 23:02:22,903 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 9 times [2022-01-09 23:02:22,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:22,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111820934] [2022-01-09 23:02:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:22,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:23,160 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 23:02:23,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:23,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111820934] [2022-01-09 23:02:23,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111820934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740365325] [2022-01-09 23:02:23,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:23,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:23,164 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 23:02:23,167 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 23:02:23,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-09 23:02:23,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:23,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-09 23:02:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:23,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-09 23:02:23,716 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-09 23:02:23,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 23 [2022-01-09 23:02:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:23,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:25,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-09 23:02:25,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-01-09 23:02:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740365325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:26,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-01-09 23:02:26,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287013771] [2022-01-09 23:02:26,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:26,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-09 23:02:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-09 23:02:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1759, Unknown=2, NotChecked=0, Total=1980 [2022-01-09 23:02:26,200 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 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 23:02:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:27,221 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-01-09 23:02:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-09 23:02:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 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 23:02:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:27,222 INFO L225 Difference]: With dead ends: 58 [2022-01-09 23:02:27,222 INFO L226 Difference]: Without dead ends: 36 [2022-01-09 23:02:27,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=628, Invalid=4772, Unknown=2, NotChecked=0, Total=5402 [2022-01-09 23:02:27,225 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:27,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 190 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 487 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-01-09 23:02:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-09 23:02:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-01-09 23:02:27,230 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 23:02:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-01-09 23:02:27,231 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-01-09 23:02:27,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:27,231 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-01-09 23:02:27,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 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 23:02:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-01-09 23:02:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 23:02:27,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:27,232 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:27,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:27,447 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 23:02:27,447 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 10 times [2022-01-09 23:02:27,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809977937] [2022-01-09 23:02:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:27,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:27,701 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 23:02:27,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809977937] [2022-01-09 23:02:27,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809977937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426037777] [2022-01-09 23:02:27,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:02:27,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:27,703 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 23:02:27,704 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 23:02:27,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:02:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-09 23:02:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:27,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:28,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:28,122 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 23:02:28,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:28,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:28,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:28,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:28,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:28,349 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 23:02:28,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426037777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:28,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:28,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2022-01-09 23:02:28,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933739529] [2022-01-09 23:02:28,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:28,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-09 23:02:28,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-09 23:02:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-01-09 23:02:28,352 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 23:02:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:28,707 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-01-09 23:02:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-09 23:02:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 33 [2022-01-09 23:02:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:28,708 INFO L225 Difference]: With dead ends: 41 [2022-01-09 23:02:28,708 INFO L226 Difference]: Without dead ends: 39 [2022-01-09 23:02:28,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-01-09 23:02:28,709 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:28,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 175 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:02:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-09 23:02:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-01-09 23:02:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-09 23:02:28,715 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2022-01-09 23:02:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:28,716 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-09 23:02:28,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 23:02:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-09 23:02:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-09 23:02:28,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:28,717 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:28,735 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 23:02:28,927 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 23:02:28,927 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1046700206, now seen corresponding path program 11 times [2022-01-09 23:02:28,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:28,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500264269] [2022-01-09 23:02:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:28,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:29,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500264269] [2022-01-09 23:02:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500264269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:29,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109402986] [2022-01-09 23:02:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:02:29,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:29,079 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 23:02:29,107 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 23:02:29,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-09 23:02:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-09 23:02:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:29,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:29,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109402986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:29,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:29,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-01-09 23:02:29,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851940184] [2022-01-09 23:02:29,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:29,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-09 23:02:29,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-09 23:02:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:02:29,453 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:29,584 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-01-09 23:02:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:02:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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 36 [2022-01-09 23:02:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:29,585 INFO L225 Difference]: With dead ends: 72 [2022-01-09 23:02:29,585 INFO L226 Difference]: Without dead ends: 44 [2022-01-09 23:02:29,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-01-09 23:02:29,586 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:29,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-09 23:02:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-01-09 23:02:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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 23:02:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-01-09 23:02:29,592 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2022-01-09 23:02:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:29,592 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-01-09 23:02:29,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-01-09 23:02:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-09 23:02:29,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:29,593 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:29,610 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 23:02:29,803 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 23:02:29,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 12 times [2022-01-09 23:02:29,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:29,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107195002] [2022-01-09 23:02:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:29,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:30,110 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 23:02:30,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107195002] [2022-01-09 23:02:30,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107195002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097302904] [2022-01-09 23:02:30,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:02:30,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:30,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:30,112 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 23:02:30,113 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 23:02:30,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-09 23:02:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-09 23:02:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:30,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:30,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:30,598 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 23:02:30,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:30,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:30,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:30,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:30,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:30,816 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 23:02:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097302904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:30,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:30,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 29 [2022-01-09 23:02:30,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61390220] [2022-01-09 23:02:30,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:30,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-09 23:02:30,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-09 23:02:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:02:30,818 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 23:02:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:31,267 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-01-09 23:02:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-09 23:02:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 37 [2022-01-09 23:02:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:31,268 INFO L225 Difference]: With dead ends: 45 [2022-01-09 23:02:31,268 INFO L226 Difference]: Without dead ends: 43 [2022-01-09 23:02:31,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-01-09 23:02:31,269 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:31,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 228 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 23:02:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-09 23:02:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-01-09 23:02:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-01-09 23:02:31,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-01-09 23:02:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-01-09 23:02:31,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 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 23:02:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-01-09 23:02:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-09 23:02:31,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:31,277 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:31,295 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 23:02:31,487 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 23:02:31,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1845221877, now seen corresponding path program 13 times [2022-01-09 23:02:31,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:31,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615902510] [2022-01-09 23:02:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:31,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:31,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615902510] [2022-01-09 23:02:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615902510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676051744] [2022-01-09 23:02:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:02:31,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:31,662 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 23:02:31,662 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 23:02:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-09 23:02:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:31,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:32,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676051744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:32,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:32,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-01-09 23:02:32,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156517635] [2022-01-09 23:02:32,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:32,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 23:02:32,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 23:02:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:02:32,069 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:32,205 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-01-09 23:02:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-09 23:02:32,205 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 40 [2022-01-09 23:02:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:32,206 INFO L225 Difference]: With dead ends: 79 [2022-01-09 23:02:32,206 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 23:02:32,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:02:32,207 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:32,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 69 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 23:02:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-01-09 23:02:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-01-09 23:02:32,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2022-01-09 23:02:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:32,215 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-01-09 23:02:32,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-01-09 23:02:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 23:02:32,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:32,216 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:32,243 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 23:02:32,428 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 23:02:32,429 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 14 times [2022-01-09 23:02:32,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469736760] [2022-01-09 23:02:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:32,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:32,757 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 23:02:32,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469736760] [2022-01-09 23:02:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469736760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715872738] [2022-01-09 23:02:32,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:32,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:32,759 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 23:02:32,759 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 23:02:32,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-09 23:02:32,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:32,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:33,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:33,251 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 23:02:33,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:33,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:33,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:33,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:33,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:33,512 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 23:02:33,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715872738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:33,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:33,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 32 [2022-01-09 23:02:33,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417477775] [2022-01-09 23:02:33,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:33,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 23:02:33,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 23:02:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:02:33,514 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:34,025 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-01-09 23:02:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-09 23:02:34,026 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 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 23:02:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:34,038 INFO L225 Difference]: With dead ends: 49 [2022-01-09 23:02:34,038 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 23:02:34,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2022-01-09 23:02:34,039 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:34,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 257 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 23:02:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 23:02:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-01-09 23:02:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-01-09 23:02:34,052 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-01-09 23:02:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:34,052 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-01-09 23:02:34,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-01-09 23:02:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:02:34,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:34,053 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:34,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:34,255 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 23:02:34,255 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 15 times [2022-01-09 23:02:34,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182147028] [2022-01-09 23:02:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:34,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:34,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182147028] [2022-01-09 23:02:34,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182147028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59520370] [2022-01-09 23:02:34,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:34,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:34,449 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 23:02:34,450 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 23:02:34,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-09 23:02:34,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-09 23:02:34,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:35,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59520370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:35,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:35,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-01-09 23:02:35,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272519617] [2022-01-09 23:02:35,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:35,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-09 23:02:35,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-09 23:02:35,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-01-09 23:02:35,059 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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 23:02:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:35,230 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-01-09 23:02:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-09 23:02:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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) Word has length 44 [2022-01-09 23:02:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:35,231 INFO L225 Difference]: With dead ends: 86 [2022-01-09 23:02:35,231 INFO L226 Difference]: Without dead ends: 52 [2022-01-09 23:02:35,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-01-09 23:02:35,232 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:35,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 85 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-09 23:02:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-09 23:02:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-01-09 23:02:35,240 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2022-01-09 23:02:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:35,240 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-01-09 23:02:35,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 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 23:02:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-01-09 23:02:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-09 23:02:35,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:35,241 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:35,260 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 23:02:35,451 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 23:02:35,452 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 16 times [2022-01-09 23:02:35,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:35,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120461185] [2022-01-09 23:02:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:35,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:35,819 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 23:02:35,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120461185] [2022-01-09 23:02:35,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120461185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366819239] [2022-01-09 23:02:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:02:35,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:35,821 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 23:02:35,822 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 23:02:35,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:02:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-09 23:02:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:35,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:36,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:36,375 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 23:02:36,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:36,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:36,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:36,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:36,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:36,633 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 23:02:36,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366819239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:36,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:36,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 35 [2022-01-09 23:02:36,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428789996] [2022-01-09 23:02:36,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:36,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-09 23:02:36,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-09 23:02:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2022-01-09 23:02:36,634 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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 23:02:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:37,182 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-01-09 23:02:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-09 23:02:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-09 23:02:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:37,183 INFO L225 Difference]: With dead ends: 53 [2022-01-09 23:02:37,184 INFO L226 Difference]: Without dead ends: 51 [2022-01-09 23:02:37,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:02:37,185 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:37,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 293 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 23:02:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-09 23:02:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-01-09 23:02:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-01-09 23:02:37,193 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2022-01-09 23:02:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:37,193 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-01-09 23:02:37,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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 23:02:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-01-09 23:02:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-09 23:02:37,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:37,194 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:37,223 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 23:02:37,407 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 23:02:37,408 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 17 times [2022-01-09 23:02:37,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:37,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432142342] [2022-01-09 23:02:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:37,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:37,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432142342] [2022-01-09 23:02:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432142342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421619919] [2022-01-09 23:02:37,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:02:37,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:37,639 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 23:02:37,640 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 23:02:37,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-09 23:02:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-09 23:02:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:38,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421619919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:38,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:38,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-01-09 23:02:38,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148947441] [2022-01-09 23:02:38,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:38,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-09 23:02:38,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-09 23:02:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-01-09 23:02:38,162 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:38,338 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-01-09 23:02:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-09 23:02:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 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 48 [2022-01-09 23:02:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:38,338 INFO L225 Difference]: With dead ends: 93 [2022-01-09 23:02:38,338 INFO L226 Difference]: Without dead ends: 56 [2022-01-09 23:02:38,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2022-01-09 23:02:38,340 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:38,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 93 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-09 23:02:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-01-09 23:02:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-01-09 23:02:38,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2022-01-09 23:02:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:38,348 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-01-09 23:02:38,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-01-09 23:02:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 23:02:38,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:38,349 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:38,373 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 23:02:38,563 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 23:02:38,564 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 18 times [2022-01-09 23:02:38,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:38,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078131552] [2022-01-09 23:02:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:38,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:38,994 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 23:02:38,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:38,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078131552] [2022-01-09 23:02:38,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078131552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:38,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664341056] [2022-01-09 23:02:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:02:38,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:39,000 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 23:02:39,003 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 23:02:39,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-09 23:02:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-09 23:02:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:39,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:39,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:39,739 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 23:02:39,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:39,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:39,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:39,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:39,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:40,016 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 23:02:40,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664341056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:40,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:40,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2022-01-09 23:02:40,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627108424] [2022-01-09 23:02:40,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:40,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-09 23:02:40,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-09 23:02:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2022-01-09 23:02:40,018 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:40,639 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-01-09 23:02:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-09 23:02:40,639 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 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 23:02:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:40,640 INFO L225 Difference]: With dead ends: 57 [2022-01-09 23:02:40,640 INFO L226 Difference]: Without dead ends: 55 [2022-01-09 23:02:40,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2022-01-09 23:02:40,641 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:40,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 371 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:02:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-09 23:02:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-01-09 23:02:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 23:02:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-01-09 23:02:40,650 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2022-01-09 23:02:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:40,650 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-01-09 23:02:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-01-09 23:02:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-09 23:02:40,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:40,651 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:40,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-09 23:02:40,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:40,855 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 19 times [2022-01-09 23:02:40,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:40,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67064431] [2022-01-09 23:02:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:40,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:41,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:41,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67064431] [2022-01-09 23:02:41,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67064431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:41,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449442418] [2022-01-09 23:02:41,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:02:41,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:41,076 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:41,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-09 23:02:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 23:02:41,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:41,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:41,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449442418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:41,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:41,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-01-09 23:02:41,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756941233] [2022-01-09 23:02:41,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:41,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-09 23:02:41,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:41,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-09 23:02:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:02:41,650 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:41,860 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-01-09 23:02:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-09 23:02:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 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 52 [2022-01-09 23:02:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:41,862 INFO L225 Difference]: With dead ends: 100 [2022-01-09 23:02:41,862 INFO L226 Difference]: Without dead ends: 60 [2022-01-09 23:02:41,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:02:41,863 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:41,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 111 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-09 23:02:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-01-09 23:02:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-01-09 23:02:41,870 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2022-01-09 23:02:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:41,871 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-01-09 23:02:41,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-01-09 23:02:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-09 23:02:41,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:41,871 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:41,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-09 23:02:42,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-09 23:02:42,072 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 20 times [2022-01-09 23:02:42,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:42,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259100898] [2022-01-09 23:02:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:42,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:42,589 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 23:02:42,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:42,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259100898] [2022-01-09 23:02:42,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259100898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:42,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540219742] [2022-01-09 23:02:42,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:42,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:42,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:42,592 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:42,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-09 23:02:42,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-09 23:02:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:42,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:43,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:43,293 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 23:02:43,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:43,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:43,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:43,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:43,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:43,575 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 23:02:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540219742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:43,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:43,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2022-01-09 23:02:43,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804971324] [2022-01-09 23:02:43,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:43,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-09 23:02:43,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-09 23:02:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:02:43,577 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:44,285 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-01-09 23:02:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-09 23:02:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 23:02:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:44,286 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:02:44,286 INFO L226 Difference]: Without dead ends: 59 [2022-01-09 23:02:44,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2022-01-09 23:02:44,287 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:44,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 446 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:02:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-09 23:02:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-01-09 23:02:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-01-09 23:02:44,295 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-01-09 23:02:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-01-09 23:02:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-01-09 23:02:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 23:02:44,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:44,296 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:44,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:44,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-09 23:02:44,496 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:44,497 INFO L85 PathProgramCache]: Analyzing trace with hash 726953397, now seen corresponding path program 21 times [2022-01-09 23:02:44,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:44,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447874575] [2022-01-09 23:02:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:44,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:44,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:44,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447874575] [2022-01-09 23:02:44,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447874575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:44,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64362162] [2022-01-09 23:02:44,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:44,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:44,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:44,817 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:44,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-09 23:02:45,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-01-09 23:02:45,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-09 23:02:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:45,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:45,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64362162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:45,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:45,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-01-09 23:02:45,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130785759] [2022-01-09 23:02:45,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:45,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-09 23:02:45,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:45,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-09 23:02:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-09 23:02:45,620 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:45,855 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-01-09 23:02:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-09 23:02:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 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 56 [2022-01-09 23:02:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:45,856 INFO L225 Difference]: With dead ends: 107 [2022-01-09 23:02:45,856 INFO L226 Difference]: Without dead ends: 64 [2022-01-09 23:02:45,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2022-01-09 23:02:45,858 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:45,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 112 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-09 23:02:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-01-09 23:02:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-01-09 23:02:45,868 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2022-01-09 23:02:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:45,868 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-01-09 23:02:45,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-01-09 23:02:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-09 23:02:45,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:45,869 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:45,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-09 23:02:46,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:46,071 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 22 times [2022-01-09 23:02:46,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:46,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326556930] [2022-01-09 23:02:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:46,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:46,800 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 23:02:46,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326556930] [2022-01-09 23:02:46,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326556930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:46,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408422275] [2022-01-09 23:02:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:02:46,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:46,802 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:46,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-09 23:02:46,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:02:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-09 23:02:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:47,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-09 23:02:47,730 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 23:02:47,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:48,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:48,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:48,377 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 23:02:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408422275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:48,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:48,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2022-01-09 23:02:48,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067631519] [2022-01-09 23:02:48,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:48,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-09 23:02:48,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-09 23:02:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=4738, Unknown=0, NotChecked=0, Total=4970 [2022-01-09 23:02:48,380 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:49,686 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-01-09 23:02:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-09 23:02:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 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 23:02:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:49,688 INFO L225 Difference]: With dead ends: 65 [2022-01-09 23:02:49,688 INFO L226 Difference]: Without dead ends: 63 [2022-01-09 23:02:49,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=373, Invalid=7109, Unknown=0, NotChecked=0, Total=7482 [2022-01-09 23:02:49,689 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:49,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 710 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:02:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-09 23:02:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-01-09 23:02:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-01-09 23:02:49,698 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2022-01-09 23:02:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:49,698 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-01-09 23:02:49,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-01-09 23:02:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-09 23:02:49,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:49,699 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:49,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:49,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:49,900 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 23 times [2022-01-09 23:02:49,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:49,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130751705] [2022-01-09 23:02:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:49,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:50,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130751705] [2022-01-09 23:02:50,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130751705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357200664] [2022-01-09 23:02:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:02:50,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:50,236 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:50,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-09 23:02:50,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-09 23:02:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-09 23:02:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:50,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:50,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357200664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:50,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:50,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-01-09 23:02:50,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499535634] [2022-01-09 23:02:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:50,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-09 23:02:50,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-09 23:02:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-01-09 23:02:50,984 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 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 23:02:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:51,304 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-01-09 23:02:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-09 23:02:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 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 60 [2022-01-09 23:02:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:51,305 INFO L225 Difference]: With dead ends: 114 [2022-01-09 23:02:51,305 INFO L226 Difference]: Without dead ends: 68 [2022-01-09 23:02:51,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-01-09 23:02:51,306 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:51,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 142 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:02:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-09 23:02:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-01-09 23:02:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 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 23:02:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-01-09 23:02:51,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2022-01-09 23:02:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:51,334 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-01-09 23:02:51,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 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 23:02:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-01-09 23:02:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-09 23:02:51,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:51,335 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:51,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:51,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-09 23:02:51,551 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:51,552 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 24 times [2022-01-09 23:02:51,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:51,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956178590] [2022-01-09 23:02:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:51,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:52,105 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 23:02:52,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956178590] [2022-01-09 23:02:52,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956178590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346382782] [2022-01-09 23:02:52,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:02:52,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:52,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:52,106 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:52,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-09 23:02:52,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-09 23:02:52,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-09 23:02:52,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:52,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:53,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:53,063 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 23:02:53,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:53,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:53,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:53,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:53,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:53,390 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 23:02:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346382782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:53,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:53,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 47 [2022-01-09 23:02:53,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953169519] [2022-01-09 23:02:53,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:53,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-09 23:02:53,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-09 23:02:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2042, Unknown=0, NotChecked=0, Total=2162 [2022-01-09 23:02:53,392 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:54,309 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-01-09 23:02:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-09 23:02:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 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 23:02:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:54,310 INFO L225 Difference]: With dead ends: 69 [2022-01-09 23:02:54,310 INFO L226 Difference]: Without dead ends: 67 [2022-01-09 23:02:54,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=3794, Unknown=0, NotChecked=0, Total=4032 [2022-01-09 23:02:54,311 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:54,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 579 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:02:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-09 23:02:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-01-09 23:02:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-01-09 23:02:54,319 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2022-01-09 23:02:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:54,319 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-01-09 23:02:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-01-09 23:02:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-09 23:02:54,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:54,320 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:54,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-09 23:02:54,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-09 23:02:54,543 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 25 times [2022-01-09 23:02:54,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:54,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481433937] [2022-01-09 23:02:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:54,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:54,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481433937] [2022-01-09 23:02:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481433937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80929371] [2022-01-09 23:02:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:02:54,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:54,899 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:54,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-09 23:02:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-09 23:02:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:55,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:55,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80929371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:55,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:55,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-01-09 23:02:55,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156200037] [2022-01-09 23:02:55,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:55,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-09 23:02:55,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-09 23:02:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-01-09 23:02:55,669 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:55,918 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-01-09 23:02:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-09 23:02:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 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 64 [2022-01-09 23:02:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:55,919 INFO L225 Difference]: With dead ends: 121 [2022-01-09 23:02:55,919 INFO L226 Difference]: Without dead ends: 72 [2022-01-09 23:02:55,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-01-09 23:02:55,920 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:55,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 132 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:02:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-09 23:02:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-01-09 23:02:55,932 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 23:02:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-01-09 23:02:55,932 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2022-01-09 23:02:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:55,932 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-01-09 23:02:55,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-01-09 23:02:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-09 23:02:55,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:55,933 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:55,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-09 23:02:56,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-09 23:02:56,135 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 26 times [2022-01-09 23:02:56,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:56,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234008212] [2022-01-09 23:02:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:56,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:56,849 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 23:02:56,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:56,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234008212] [2022-01-09 23:02:56,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234008212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:56,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415629766] [2022-01-09 23:02:56,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:02:56,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:56,850 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:56,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-09 23:02:56,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:02:56,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:02:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-09 23:02:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:02:57,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:02:57,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:02:57,741 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 23:02:57,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:02:58,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:58,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:58,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:02:58,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:02:58,083 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 23:02:58,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415629766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:02:58,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:02:58,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2022-01-09 23:02:58,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522057283] [2022-01-09 23:02:58,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:02:58,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-09 23:02:58,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:02:58,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-09 23:02:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2322, Unknown=0, NotChecked=0, Total=2450 [2022-01-09 23:02:58,085 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:02:59,116 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-01-09 23:02:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-09 23:02:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 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 65 [2022-01-09 23:02:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:02:59,117 INFO L225 Difference]: With dead ends: 73 [2022-01-09 23:02:59,117 INFO L226 Difference]: Without dead ends: 71 [2022-01-09 23:02:59,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=253, Invalid=4303, Unknown=0, NotChecked=0, Total=4556 [2022-01-09 23:02:59,118 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:02:59,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 680 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:02:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-09 23:02:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-01-09 23:02:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-01-09 23:02:59,135 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2022-01-09 23:02:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:02:59,136 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-01-09 23:02:59,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:02:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-01-09 23:02:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-09 23:02:59,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:02:59,136 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:02:59,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-09 23:02:59,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-09 23:02:59,343 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:02:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:02:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 27 times [2022-01-09 23:02:59,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:02:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745744563] [2022-01-09 23:02:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:02:59,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:02:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:02:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:02:59,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:02:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745744563] [2022-01-09 23:02:59,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745744563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:02:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286898889] [2022-01-09 23:02:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:02:59,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:02:59,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:02:59,769 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:02:59,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-09 23:03:00,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-01-09 23:03:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-09 23:03:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:00,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:01,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286898889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:01,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:01,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-01-09 23:03:01,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619668079] [2022-01-09 23:03:01,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:01,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-09 23:03:01,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-09 23:03:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:03:01,002 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:01,279 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-01-09 23:03:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-09 23:03:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 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 68 [2022-01-09 23:03:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:01,280 INFO L225 Difference]: With dead ends: 128 [2022-01-09 23:03:01,280 INFO L226 Difference]: Without dead ends: 76 [2022-01-09 23:03:01,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-01-09 23:03:01,282 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:01,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 141 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-09 23:03:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-01-09 23:03:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 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 23:03:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-01-09 23:03:01,293 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2022-01-09 23:03:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:01,293 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-01-09 23:03:01,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-01-09 23:03:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-09 23:03:01,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:01,293 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:01,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-09 23:03:01,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:01,501 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:01,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 28 times [2022-01-09 23:03:01,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:01,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147035955] [2022-01-09 23:03:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:01,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:02,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:02,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147035955] [2022-01-09 23:03:02,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147035955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:02,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690349130] [2022-01-09 23:03:02,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:03:02,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:02,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:02,251 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:02,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-09 23:03:02,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:03:02,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:02,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-09 23:03:02,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:02,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:03:03,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-01-09 23:03:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:03,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:03,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:03:03,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:03:03,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:03:03,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:03:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:03,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690349130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:03,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:03,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 53 [2022-01-09 23:03:03,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286420756] [2022-01-09 23:03:03,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:03,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-09 23:03:03,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:03,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-09 23:03:03,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:03:03,661 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:04,783 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-01-09 23:03:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-09 23:03:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 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 69 [2022-01-09 23:03:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:04,785 INFO L225 Difference]: With dead ends: 77 [2022-01-09 23:03:04,785 INFO L226 Difference]: Without dead ends: 75 [2022-01-09 23:03:04,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2022-01-09 23:03:04,786 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:04,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 756 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:03:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-09 23:03:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-01-09 23:03:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-01-09 23:03:04,801 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2022-01-09 23:03:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:04,802 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-01-09 23:03:04,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-01-09 23:03:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-09 23:03:04,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:04,802 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:04,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-09 23:03:05,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:05,019 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 29 times [2022-01-09 23:03:05,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:05,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330538938] [2022-01-09 23:03:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:05,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:05,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:05,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330538938] [2022-01-09 23:03:05,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330538938] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:05,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049053749] [2022-01-09 23:03:05,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:03:05,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:05,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:05,474 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:05,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-09 23:03:05,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-09 23:03:05,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-09 23:03:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:06,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:06,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049053749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:06,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:06,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2022-01-09 23:03:06,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187827889] [2022-01-09 23:03:06,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:06,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-09 23:03:06,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-09 23:03:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2022-01-09 23:03:06,542 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:06,840 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2022-01-09 23:03:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-09 23:03:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 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 72 [2022-01-09 23:03:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:06,841 INFO L225 Difference]: With dead ends: 135 [2022-01-09 23:03:06,841 INFO L226 Difference]: Without dead ends: 80 [2022-01-09 23:03:06,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2022-01-09 23:03:06,842 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 230 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:06,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 138 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:03:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-09 23:03:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2022-01-09 23:03:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 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 23:03:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-01-09 23:03:06,853 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2022-01-09 23:03:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:06,853 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-01-09 23:03:06,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-01-09 23:03:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-09 23:03:06,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:06,854 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:06,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-09 23:03:07,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-09 23:03:07,055 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:07,055 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 30 times [2022-01-09 23:03:07,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:07,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639429814] [2022-01-09 23:03:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:07,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:03:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:08,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:03:08,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639429814] [2022-01-09 23:03:08,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639429814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:03:08,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500820046] [2022-01-09 23:03:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:03:08,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:08,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:03:08,073 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:03:08,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-09 23:03:08,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-01-09 23:03:08,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:03:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-09 23:03:08,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:03:09,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-09 23:03:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:10,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:03:10,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:03:10,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:03:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:03:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500820046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:03:11,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:03:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2022-01-09 23:03:11,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80386797] [2022-01-09 23:03:11,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:03:11,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-09 23:03:11,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:03:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-09 23:03:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7938, Unknown=0, NotChecked=0, Total=8190 [2022-01-09 23:03:11,248 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:03:14,339 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-01-09 23:03:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-09 23:03:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 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 73 [2022-01-09 23:03:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:03:14,339 INFO L225 Difference]: With dead ends: 81 [2022-01-09 23:03:14,339 INFO L226 Difference]: Without dead ends: 79 [2022-01-09 23:03:14,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=549, Invalid=15201, Unknown=0, NotChecked=0, Total=15750 [2022-01-09 23:03:14,340 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 3700 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:03:14,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1199 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3700 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-09 23:03:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-09 23:03:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-01-09 23:03:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-01-09 23:03:14,355 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2022-01-09 23:03:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:03:14,355 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-01-09 23:03:14,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:03:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-01-09 23:03:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-09 23:03:14,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:03:14,356 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:03:14,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-09 23:03:14,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:03:14,571 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:03:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:03:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 31 times [2022-01-09 23:03:14,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:03:14,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357298791] [2022-01-09 23:03:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:03:14,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:03:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat