/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/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:41:37,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:41:37,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:41:37,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:41:37,718 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 02:41:37,742 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:41:37,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:41:37,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:41:37,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:41:37,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:41:37,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:41:37,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:41:37,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:41:37,745 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:41:37,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:41:37,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:41:37,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:41:37,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:41:37,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:41:37,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:41:37,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:41:37,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:41:37,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:41:37,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:41:37,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:41:37,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:41:37,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:41:37,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:41:37,964 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:41:37,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-01-10 02:41:38,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f97e74b7/5ab3da214dcd4e29abc3c67666ddc89d/FLAGbe5f82036 [2022-01-10 02:41:38,324 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:41:38,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-01-10 02:41:38,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f97e74b7/5ab3da214dcd4e29abc3c67666ddc89d/FLAGbe5f82036 [2022-01-10 02:41:38,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f97e74b7/5ab3da214dcd4e29abc3c67666ddc89d [2022-01-10 02:41:38,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:41:38,760 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:41:38,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:41:38,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:41:38,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:41:38,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:38,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6460e954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38, skipping insertion in model container [2022-01-10 02:41:38,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:38,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:41:38,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:41:38,896 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/insertion_sort-2.c[328,341] [2022-01-10 02:41:38,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:41:38,924 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:41:38,931 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/insertion_sort-2.c[328,341] [2022-01-10 02:41:38,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:41:38,957 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:41:38,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38 WrapperNode [2022-01-10 02:41:38,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:41:38,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:41:38,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:41:38,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:41:38,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:38,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:38,997 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-01-10 02:41:38,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:41:38,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:41:38,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:41:38,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:41:39,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:41:39,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:41:39,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:41:39,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:41:39,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (1/1) ... [2022-01-10 02:41:39,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:41:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:41:39,063 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 02:41:39,065 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 02:41:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:41:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:41:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 02:41:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 02:41:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:41:39,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:41:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 02:41:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 02:41:39,136 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:41:39,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:41:39,244 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:41:39,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:41:39,248 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 02:41:39,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:41:39 BoogieIcfgContainer [2022-01-10 02:41:39,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:41:39,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:41:39,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:41:39,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:41:39,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:41:38" (1/3) ... [2022-01-10 02:41:39,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15deba1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:41:39, skipping insertion in model container [2022-01-10 02:41:39,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:41:38" (2/3) ... [2022-01-10 02:41:39,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15deba1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:41:39, skipping insertion in model container [2022-01-10 02:41:39,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:41:39" (3/3) ... [2022-01-10 02:41:39,254 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-01-10 02:41:39,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:41:39,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:41:39,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:41:39,340 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 02:41:39,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:41:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) [2022-01-10 02:41:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 02:41:39,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:39,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:39,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1991822609, now seen corresponding path program 1 times [2022-01-10 02:41:39,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772604781] [2022-01-10 02:41:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:39,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:39,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:39,398 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 02:41:39,400 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 02:41:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:41:39,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:39,539 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 02:41:39,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:41:39,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772604781] [2022-01-10 02:41:39,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772604781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:41:39,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:41:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:41:39,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303902582] [2022-01-10 02:41:39,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:41:39,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:41:39,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:39,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:41:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:41:39,572 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 02:41:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:39,583 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-01-10 02:41:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:41:39,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 02:41:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:39,590 INFO L225 Difference]: With dead ends: 40 [2022-01-10 02:41:39,590 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 02:41:39,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:41:39,595 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2022-01-10 02:41:39,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:41:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 02:41:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 02:41:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-01-10 02:41:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 02:41:39,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2022-01-10 02:41:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:39,614 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 02:41:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 02:41:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 02:41:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 02:41:39,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:39,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:39,638 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 02:41:39,822 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 02:41:39,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:39,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2015834155, now seen corresponding path program 1 times [2022-01-10 02:41:39,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:39,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515625228] [2022-01-10 02:41:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:39,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:39,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:39,826 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 02:41:39,831 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 02:41:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:41:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:39,983 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 02:41:39,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:41:39,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:39,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515625228] [2022-01-10 02:41:39,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515625228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:41:39,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:41:39,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:41:39,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291158372] [2022-01-10 02:41:39,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:41:39,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:41:39,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:39,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:41:39,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:41:39,985 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 02:41:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:40,071 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 02:41:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:41:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 02:41:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:40,072 INFO L225 Difference]: With dead ends: 37 [2022-01-10 02:41:40,072 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 02:41:40,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:41:40,073 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:40,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 60 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:41:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 02:41:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-01-10 02:41:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 02:41:40,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-01-10 02:41:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:40,078 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 02:41:40,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 02:41:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 02:41:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:41:40,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:40,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:40,085 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 02:41:40,279 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 02:41:40,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1565261075, now seen corresponding path program 1 times [2022-01-10 02:41:40,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:40,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251968644] [2022-01-10 02:41:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:40,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:40,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:40,286 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 02:41:40,289 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 02:41:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:40,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:41:40,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:40,419 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 02:41:40,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:40,575 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 02:41:40,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251968644] [2022-01-10 02:41:40,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251968644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:40,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:40,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:41:40,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731988389] [2022-01-10 02:41:40,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:40,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:41:40,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:41:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:41:40,578 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:40,704 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-01-10 02:41:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:41:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:41:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:40,705 INFO L225 Difference]: With dead ends: 42 [2022-01-10 02:41:40,706 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 02:41:40,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:41:40,707 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:40,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 95 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:41:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 02:41:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-10 02:41:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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 02:41:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-01-10 02:41:40,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 11 [2022-01-10 02:41:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:40,711 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-01-10 02:41:40,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:41:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-01-10 02:41:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:41:40,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:40,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:40,720 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 02:41:40,920 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 02:41:40,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:40,921 INFO L85 PathProgramCache]: Analyzing trace with hash 797223332, now seen corresponding path program 1 times [2022-01-10 02:41:40,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:40,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187571416] [2022-01-10 02:41:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:40,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:40,923 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 02:41:40,924 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 02:41:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:41:40,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:41,039 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 6 treesize of output 5 [2022-01-10 02:41:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:41,204 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 30 treesize of output 29 [2022-01-10 02:41:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:41,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:41:41,297 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 1 case distinctions, treesize of input 63 treesize of output 21 [2022-01-10 02:41:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:41:41,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:41:42,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187571416] [2022-01-10 02:41:42,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187571416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:42,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:42,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-01-10 02:41:42,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140430276] [2022-01-10 02:41:42,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:42,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:41:42,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:41:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:41:42,072 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 02:41:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:42,533 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-01-10 02:41:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 02:41:42,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 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 02:41:42,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:42,534 INFO L225 Difference]: With dead ends: 59 [2022-01-10 02:41:42,534 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 02:41:42,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:41:42,536 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:42,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 164 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-01-10 02:41:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 02:41:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2022-01-10 02:41:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2022-01-10 02:41:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-10 02:41:42,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2022-01-10 02:41:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-10 02:41:42,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 02:41:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-10 02:41:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:41:42,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:42,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:42,549 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 02:41:42,748 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 02:41:42,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:42,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1495294633, now seen corresponding path program 1 times [2022-01-10 02:41:42,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:42,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063429111] [2022-01-10 02:41:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:42,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:42,751 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 02:41:42,752 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 02:41:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:41:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:41:42,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:41:42,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063429111] [2022-01-10 02:41:42,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063429111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:42,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:42,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-10 02:41:42,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199056924] [2022-01-10 02:41:42,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:42,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:41:42,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:41:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:41:42,931 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 02:41:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:43,049 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-01-10 02:41:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 02:41:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 22 [2022-01-10 02:41:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:43,051 INFO L225 Difference]: With dead ends: 65 [2022-01-10 02:41:43,051 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 02:41:43,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:41:43,052 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:43,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 135 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:41:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 02:41:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2022-01-10 02:41:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2022-01-10 02:41:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-01-10 02:41:43,057 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-01-10 02:41:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-01-10 02:41:43,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 02:41:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-01-10 02:41:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:41:43,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:43,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:43,067 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 02:41:43,269 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 02:41:43,269 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash -815236263, now seen corresponding path program 1 times [2022-01-10 02:41:43,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:43,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330017313] [2022-01-10 02:41:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:43,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:43,271 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 02:41:43,272 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 02:41:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 02:41:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:43,507 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 38 treesize of output 28 [2022-01-10 02:41:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:43,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:41:43,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2022-01-10 02:41:43,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:43,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:41:43,668 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 1 case distinctions, treesize of input 62 treesize of output 20 [2022-01-10 02:41:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:41:43,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:43,994 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 89 treesize of output 79 [2022-01-10 02:41:44,027 INFO L353 Elim1Store]: treesize reduction 41, result has 25.5 percent of original size [2022-01-10 02:41:44,028 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 1309 treesize of output 1092 [2022-01-10 02:41:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:41:46,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:46,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330017313] [2022-01-10 02:41:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330017313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:46,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:46,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-01-10 02:41:46,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73776623] [2022-01-10 02:41:46,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:46,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:41:46,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:46,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:41:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:41:46,102 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 02:41:49,277 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 02:41:51,971 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 02:41:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:52,380 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-01-10 02:41:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 02:41:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 22 [2022-01-10 02:41:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:52,381 INFO L225 Difference]: With dead ends: 100 [2022-01-10 02:41:52,381 INFO L226 Difference]: Without dead ends: 98 [2022-01-10 02:41:52,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 02:41:52,383 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 194 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 84 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:52,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 172 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 361 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-01-10 02:41:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-10 02:41:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 42. [2022-01-10 02:41:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 02:41:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-10 02:41:52,389 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-01-10 02:41:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:52,389 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-10 02:41:52,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 02:41:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-10 02:41:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 02:41:52,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:52,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:52,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:52,590 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 02:41:52,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash 755836794, now seen corresponding path program 1 times [2022-01-10 02:41:52,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:52,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144362757] [2022-01-10 02:41:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:52,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:52,593 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 02:41:52,594 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 02:41:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:52,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:41:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:41:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:41:53,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144362757] [2022-01-10 02:41:53,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144362757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:53,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:53,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 02:41:53,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893240814] [2022-01-10 02:41:53,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:53,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:41:53,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:41:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:41:53,027 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2022-01-10 02:41:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:53,389 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-01-10 02:41:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 02:41:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) Word has length 23 [2022-01-10 02:41:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:53,390 INFO L225 Difference]: With dead ends: 100 [2022-01-10 02:41:53,390 INFO L226 Difference]: Without dead ends: 49 [2022-01-10 02:41:53,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:41:53,392 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:53,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 128 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:41:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-10 02:41:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-01-10 02:41:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 02:41:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-01-10 02:41:53,397 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 23 [2022-01-10 02:41:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:53,398 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-01-10 02:41:53,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2022-01-10 02:41:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-01-10 02:41:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:41:53,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:53,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:53,405 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 02:41:53,604 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 02:41:53,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash 599694327, now seen corresponding path program 1 times [2022-01-10 02:41:53,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109064901] [2022-01-10 02:41:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:41:53,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:53,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:53,607 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 02:41:53,614 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 02:41:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:41:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:41:53,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:41:53,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:41:53,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109064901] [2022-01-10 02:41:53,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109064901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:41:53,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:41:53,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:41:53,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817303366] [2022-01-10 02:41:53,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:41:53,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:41:53,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:41:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:41:53,694 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-01-10 02:41:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:41:53,745 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-01-10 02:41:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:41:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) Word has length 27 [2022-01-10 02:41:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:41:53,746 INFO L225 Difference]: With dead ends: 65 [2022-01-10 02:41:53,746 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 02:41:53,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:41:53,747 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:41:53,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 60 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:41:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 02:41:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-01-10 02:41:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 02:41:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-10 02:41:53,752 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2022-01-10 02:41:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:41:53,752 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-10 02:41:53,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-01-10 02:41:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-10 02:41:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:41:53,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:41:53,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:41:53,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 02:41:53,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:41:53,960 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:41:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:41:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 17457638, now seen corresponding path program 2 times [2022-01-10 02:41:53,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:41:53,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983942638] [2022-01-10 02:41:53,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:41:53,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:41:53,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:41:53,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:41:53,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 02:41:54,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:41:54,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:41:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:41:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:41:54,163 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 6 treesize of output 5 [2022-01-10 02:41:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:54,281 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 30 treesize of output 29 [2022-01-10 02:41:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:41:54,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:41:54,365 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 1 case distinctions, treesize of input 63 treesize of output 21 [2022-01-10 02:41:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:41:54,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:41:54,856 INFO L353 Elim1Store]: treesize reduction 31, result has 47.5 percent of original size [2022-01-10 02:41:54,857 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 142 treesize of output 132 [2022-01-10 02:41:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:41:55,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:41:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983942638] [2022-01-10 02:41:55,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983942638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:41:55,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:41:55,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2022-01-10 02:41:55,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701739780] [2022-01-10 02:41:55,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:41:55,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:41:55,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:41:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:41:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:41:55,186 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 02:41:57,757 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 02:41:59,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 02:42:02,662 WARN L534 Checker$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 02:42:04,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 02:42:06,668 WARN L534 Checker$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 02:42:08,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 02:42:10,885 WARN L534 Checker$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 02:42:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:11,452 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2022-01-10 02:42:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 02:42:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 30 [2022-01-10 02:42:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:11,454 INFO L225 Difference]: With dead ends: 120 [2022-01-10 02:42:11,454 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 02:42:11,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=453, Invalid=2199, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 02:42:11,455 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 120 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:11,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 203 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 486 Invalid, 7 Unknown, 39 Unchecked, 15.0s Time] [2022-01-10 02:42:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 02:42:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 50. [2022-01-10 02:42:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 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) [2022-01-10 02:42:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-01-10 02:42:11,462 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 30 [2022-01-10 02:42:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:11,462 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-01-10 02:42:11,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 02:42:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-01-10 02:42:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:42:11,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:11,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:11,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:11,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:42:11,663 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 406516939, now seen corresponding path program 2 times [2022-01-10 02:42:11,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982139410] [2022-01-10 02:42:11,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:42:11,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:11,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:42:11,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 02:42:11,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:42:11,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 02:42:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:11,820 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 6 treesize of output 5 [2022-01-10 02:42:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:11,966 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 32 treesize of output 31 [2022-01-10 02:42:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:12,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:42:12,208 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 1 case distinctions, treesize of input 63 treesize of output 21 [2022-01-10 02:42:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:42:12,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:19,632 INFO L353 Elim1Store]: treesize reduction 31, result has 43.6 percent of original size [2022-01-10 02:42:19,632 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 152 treesize of output 140 [2022-01-10 02:42:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:42:20,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982139410] [2022-01-10 02:42:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982139410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:20,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:20,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-01-10 02:42:20,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647193385] [2022-01-10 02:42:20,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:20,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 02:42:20,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 02:42:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=568, Unknown=3, NotChecked=0, Total=702 [2022-01-10 02:42:20,423 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-10 02:42:24,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 02:42:26,197 WARN L534 Checker$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 02:42:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:49,679 INFO L93 Difference]: Finished difference Result 176 states and 211 transitions. [2022-01-10 02:42:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-10 02:42:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 31 [2022-01-10 02:42:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:49,681 INFO L225 Difference]: With dead ends: 176 [2022-01-10 02:42:49,681 INFO L226 Difference]: Without dead ends: 174 [2022-01-10 02:42:49,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=723, Invalid=2925, Unknown=12, NotChecked=0, Total=3660 [2022-01-10 02:42:49,683 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 315 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 154 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:49,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 304 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 469 Invalid, 2 Unknown, 163 Unchecked, 5.7s Time] [2022-01-10 02:42:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-10 02:42:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 74. [2022-01-10 02:42:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 02:42:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-01-10 02:42:49,695 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 31 [2022-01-10 02:42:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:49,695 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-01-10 02:42:49,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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) [2022-01-10 02:42:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-01-10 02:42:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 02:42:49,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:49,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:49,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:49,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:42:49,906 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2111856333, now seen corresponding path program 3 times [2022-01-10 02:42:49,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:49,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393148930] [2022-01-10 02:42:49,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:42:49,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:49,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:49,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:42:49,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 02:42:50,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:42:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 02:42:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:50,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:50,418 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 32 treesize of output 31 [2022-01-10 02:42:50,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:50,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 02:42:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 02:42:50,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:42:50,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 27 [2022-01-10 02:42:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:42:50,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:51,146 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 54 treesize of output 48 [2022-01-10 02:42:51,184 INFO L353 Elim1Store]: treesize reduction 31, result has 43.6 percent of original size [2022-01-10 02:42:51,184 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 152 treesize of output 140 [2022-01-10 02:42:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 02:42:52,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393148930] [2022-01-10 02:42:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393148930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:52,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-01-10 02:42:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394923328] [2022-01-10 02:42:52,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:52,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 02:42:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 02:42:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-01-10 02:42:52,747 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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) [2022-01-10 02:42:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:54,012 INFO L93 Difference]: Finished difference Result 194 states and 234 transitions. [2022-01-10 02:42:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 02:42:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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) Word has length 36 [2022-01-10 02:42:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:54,015 INFO L225 Difference]: With dead ends: 194 [2022-01-10 02:42:54,015 INFO L226 Difference]: Without dead ends: 192 [2022-01-10 02:42:54,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 02:42:54,016 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:54,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 288 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 343 Invalid, 0 Unknown, 193 Unchecked, 0.5s Time] [2022-01-10 02:42:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-10 02:42:54,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 116. [2022-01-10 02:42:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3043478260869565) internal successors, (150), 115 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 02:42:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2022-01-10 02:42:54,041 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 36 [2022-01-10 02:42:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:54,041 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2022-01-10 02:42:54,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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) [2022-01-10 02:42:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2022-01-10 02:42:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 02:42:54,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:54,042 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:54,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:54,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:42:54,252 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:54,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1431797963, now seen corresponding path program 2 times [2022-01-10 02:42:54,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:54,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298495441] [2022-01-10 02:42:54,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:42:54,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:54,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:54,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:42:54,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 02:42:54,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:42:54,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:42:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:42:54,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:42:54,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:42:54,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298495441] [2022-01-10 02:42:54,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298495441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:42:54,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:42:54,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-01-10 02:42:54,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175651817] [2022-01-10 02:42:54,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:42:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 02:42:54,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:42:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 02:42:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:42:54,515 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2022-01-10 02:42:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:42:55,442 INFO L93 Difference]: Finished difference Result 553 states and 702 transitions. [2022-01-10 02:42:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 02:42:55,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) Word has length 36 [2022-01-10 02:42:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:42:55,444 INFO L225 Difference]: With dead ends: 553 [2022-01-10 02:42:55,445 INFO L226 Difference]: Without dead ends: 482 [2022-01-10 02:42:55,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 02:42:55,446 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 471 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:42:55,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 243 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:42:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-10 02:42:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 243. [2022-01-10 02:42:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.3181818181818181) internal successors, (319), 242 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 02:42:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 319 transitions. [2022-01-10 02:42:55,479 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 319 transitions. Word has length 36 [2022-01-10 02:42:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:42:55,479 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 319 transitions. [2022-01-10 02:42:55,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 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) [2022-01-10 02:42:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 319 transitions. [2022-01-10 02:42:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 02:42:55,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:42:55,484 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:42:55,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 02:42:55,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:42:55,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:42:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:42:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1213007240, now seen corresponding path program 3 times [2022-01-10 02:42:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:42:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058509293] [2022-01-10 02:42:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:42:55,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:42:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:42:55,722 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:42:55,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 02:42:55,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:42:55,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:42:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 02:42:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:42:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:55,952 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 44 treesize of output 32 [2022-01-10 02:42:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:56,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:42:56,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 35 [2022-01-10 02:42:56,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:56,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 02:42:56,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 02:42:56,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 02:42:56,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:42:56,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 26 [2022-01-10 02:42:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 02:42:56,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:42:57,094 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 89 treesize of output 79