/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_Bitvector.epf -i ../../../trunk/examples/svcomp/loops/invert_string-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:41:56,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:41:56,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:41:56,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:41:56,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 02:41:56,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:41:56,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:41:56,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:41:56,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:41:56,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:41:56,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:41:56,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:41:56,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:41:56,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:41:56,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:41:56,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:41:56,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:41:56,327 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:41:56,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:41:56,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:41:56,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:41:56,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:41:56,550 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:41:56,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-3.c [2022-01-10 02:41:56,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad715fbf8/9c41267e92ff4672bbd690484fad1908/FLAGee98e9a46 [2022-01-10 02:41:56,946 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:41:56,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c [2022-01-10 02:41:56,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad715fbf8/9c41267e92ff4672bbd690484fad1908/FLAGee98e9a46 [2022-01-10 02:41:56,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad715fbf8/9c41267e92ff4672bbd690484fad1908 [2022-01-10 02:41:56,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:41:56,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:41:56,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:41:56,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:41:56,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:41:56,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:41:56" (1/1) ... [2022-01-10 02:41:56,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609c3cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:56, skipping insertion in model container [2022-01-10 02:41:56,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:41:56" (1/1) ... [2022-01-10 02:41:56,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:41:56,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:41:57,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c[327,340] [2022-01-10 02:41:57,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:41:57,151 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:41:57,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c[327,340] [2022-01-10 02:41:57,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:41:57,170 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:41:57,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57 WrapperNode [2022-01-10 02:41:57,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:41:57,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:41:57,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:41:57,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:41:57,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,191 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-10 02:41:57,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:41:57,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:41:57,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:41:57,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:41:57,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:41:57,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:41:57,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:41:57,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:41:57,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (1/1) ... [2022-01-10 02:41:57,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:41:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:41:57,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 02:41:57,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 02:41:57,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:41:57,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-10 02:41:57,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:41:57,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 02:41:57,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:41:57,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:41:57,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-10 02:41:57,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 02:41:57,361 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:41:57,363 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:41:57,535 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:41:57,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:41:57,538 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 02:41:57,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:41:57 BoogieIcfgContainer [2022-01-10 02:41:57,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:41:57,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:41:57,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:41:57,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:41:57,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:41:56" (1/3) ... [2022-01-10 02:41:57,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37214407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:41:57, skipping insertion in model container [2022-01-10 02:41:57,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:57" (2/3) ... [2022-01-10 02:41:57,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37214407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:41:57, skipping insertion in model container [2022-01-10 02:41:57,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:41:57" (3/3) ... [2022-01-10 02:41:57,544 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2022-01-10 02:41:57,547 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:41:57,548 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:41:57,596 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:41:57,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 02:41:57,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:41:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 02:41:57,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:57,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:57,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2022-01-10 02:41:57,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:57,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714098450] [2022-01-10 02:41:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:57,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:57,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:57,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 02:41:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:41:57,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:41:57,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:41:57,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714098450] [2022-01-10 02:41:57,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714098450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:41:57,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:41:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:41:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932088393] [2022-01-10 02:41:57,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:41:57,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:41:57,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:41:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:41:57,875 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:57,934 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-01-10 02:41:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:41:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2022-01-10 02:41:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:57,940 INFO L225 Difference]: With dead ends: 34 [2022-01-10 02:41:57,940 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 02:41:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:41:57,944 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:57,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:41:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 02:41:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-01-10 02:41:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 02:41:57,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-01-10 02:41:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:57,964 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 02:41:57,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 02:41:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:41:57,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:57,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:57,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:58,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:58,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2022-01-10 02:41:58,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610047552] [2022-01-10 02:41:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:58,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:58,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:58,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 02:41:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:58,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:41:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:41:58,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:41:58,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:58,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610047552] [2022-01-10 02:41:58,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610047552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:58,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:58,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:41:58,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476227009] [2022-01-10 02:41:58,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:58,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:41:58,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:41:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:41:58,424 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-01-10 02:41:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:58,501 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-01-10 02:41:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:41:58,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) Word has length 11 [2022-01-10 02:41:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:58,502 INFO L225 Difference]: With dead ends: 31 [2022-01-10 02:41:58,502 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 02:41:58,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:41:58,503 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:58,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:41:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 02:41:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 02:41:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2022-01-10 02:41:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-10 02:41:58,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2022-01-10 02:41:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:58,507 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-10 02:41:58,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-01-10 02:41:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-10 02:41:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 02:41:58,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:58,508 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:58,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 02:41:58,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:58,711 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash -8547635, now seen corresponding path program 2 times [2022-01-10 02:41:58,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967099707] [2022-01-10 02:41:58,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:41:58,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:58,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:58,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:58,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 02:41:58,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 02:41:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:41:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:41:58,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:41:58,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:58,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967099707] [2022-01-10 02:41:58,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967099707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:41:58,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:41:58,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:41:58,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176260090] [2022-01-10 02:41:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:41:58,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:41:58,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:41:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:41:58,810 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-01-10 02:41:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:58,842 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-10 02:41:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:41:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 02:41:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:58,843 INFO L225 Difference]: With dead ends: 30 [2022-01-10 02:41:58,843 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 02:41:58,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:41:58,844 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:58,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:41:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 02:41:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-10 02:41:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-10 02:41:58,848 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-01-10 02:41:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:58,848 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-10 02:41:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-01-10 02:41:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-10 02:41:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:41:58,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:58,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:58,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:59,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:59,057 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2021040587, now seen corresponding path program 1 times [2022-01-10 02:41:59,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:59,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757486476] [2022-01-10 02:41:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:59,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:59,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:59,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:59,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 02:41:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:41:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:41:59,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:41:59,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:59,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757486476] [2022-01-10 02:41:59,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757486476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:59,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:59,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:41:59,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556982668] [2022-01-10 02:41:59,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:59,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:41:59,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:41:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:41:59,385 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:59,509 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-10 02:41:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:41:59,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2022-01-10 02:41:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:59,510 INFO L225 Difference]: With dead ends: 36 [2022-01-10 02:41:59,510 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 02:41:59,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:41:59,511 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:59,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 47 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:41:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 02:41:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-10 02:41:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-10 02:41:59,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-01-10 02:41:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:59,514 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-10 02:41:59,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-10 02:41:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 02:41:59,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:59,515 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:59,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:59,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:59,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1661412983, now seen corresponding path program 2 times [2022-01-10 02:41:59,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:59,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440215900] [2022-01-10 02:41:59,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:41:59,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:59,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:59,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:59,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 02:41:59,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:41:59,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:59,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:41:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:41:59,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:41:59,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:59,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440215900] [2022-01-10 02:41:59,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440215900] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:59,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:59,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:41:59,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434241998] [2022-01-10 02:41:59,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:59,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:41:59,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:41:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:41:59,909 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-01-10 02:42:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:00,028 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-01-10 02:42:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:42:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 21 [2022-01-10 02:42:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:00,031 INFO L225 Difference]: With dead ends: 43 [2022-01-10 02:42:00,031 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 02:42:00,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:42:00,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:00,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:42:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 02:42:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-01-10 02:42:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-10 02:42:00,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-01-10 02:42:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:00,037 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-10 02:42:00,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-01-10 02:42:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-10 02:42:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:42:00,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:00,038 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:00,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:00,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:42:00,245 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash -509111549, now seen corresponding path program 3 times [2022-01-10 02:42:00,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52899201] [2022-01-10 02:42:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:42:00,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:00,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:42:00,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 02:42:00,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 02:42:00,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:00,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:42:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:42:00,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:42:00,779 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:00,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52899201] [2022-01-10 02:42:00,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52899201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:00,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:00,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-01-10 02:42:00,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583905519] [2022-01-10 02:42:00,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:00,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 02:42:00,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:00,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 02:42:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:42:00,781 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:01,236 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-01-10 02:42:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:42:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 27 [2022-01-10 02:42:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:01,238 INFO L225 Difference]: With dead ends: 74 [2022-01-10 02:42:01,238 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 02:42:01,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:42:01,239 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 226 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:01,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 89 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:42:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 02:42:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2022-01-10 02:42:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-01-10 02:42:01,245 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2022-01-10 02:42:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:01,245 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-01-10 02:42:01,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:42:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-01-10 02:42:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:42:01,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:01,246 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:01,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 02:42:01,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:42:01,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:01,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2015456385, now seen corresponding path program 4 times [2022-01-10 02:42:01,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:01,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232821] [2022-01-10 02:42:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:42:01,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:01,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:42:01,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 02:42:01,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:42:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 02:42:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:01,624 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 11 treesize of output 9 [2022-01-10 02:42:02,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 02:42:02,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 02:42:02,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 30 [2022-01-10 02:42:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:42:02,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:02,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:42:02,825 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 218 treesize of output 193 [2022-01-10 02:42:02,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:42:02,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 417 treesize of output 384 [2022-01-10 02:42:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 02:42:57,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232821] [2022-01-10 02:42:57,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:57,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:57,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2022-01-10 02:42:57,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281637825] [2022-01-10 02:42:57,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:57,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 02:42:57,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 02:42:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:42:57,611 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:00,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 02:43:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:02,501 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2022-01-10 02:43:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 02:43:02,502 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-10 02:43:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:02,502 INFO L225 Difference]: With dead ends: 97 [2022-01-10 02:43:02,502 INFO L226 Difference]: Without dead ends: 95 [2022-01-10 02:43:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 02:43:02,505 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:02,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 255 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 725 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-01-10 02:43:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-10 02:43:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 45. [2022-01-10 02:43:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-01-10 02:43:02,511 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2022-01-10 02:43:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:02,511 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-01-10 02:43:02,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-01-10 02:43:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 02:43:02,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:02,512 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:02,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 02:43:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:43:02,719 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2120626473, now seen corresponding path program 1 times [2022-01-10 02:43:02,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:02,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958916069] [2022-01-10 02:43:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:02,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:02,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:43:02,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 02:43:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:02,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 02:43:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:02,879 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 11 treesize of output 9 [2022-01-10 02:43:03,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-01-10 02:43:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:43:03,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-01-10 02:43:03,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 30 [2022-01-10 02:43:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:43:03,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:04,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:04,158 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 270 treesize of output 258 [2022-01-10 02:43:05,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:05,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 458 treesize of output 438