/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/array-patterns/array6_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:59:21,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:59:21,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:59:21,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:59:21,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:59:21,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:59:21,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:59:21,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:59:21,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:59:22,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:59:22,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:59:22,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-10 03:59:22,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:59:22,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:59:22,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:59:22,057 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 03:59:22,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:59:22,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:59:22,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:59:22,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:59:22,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:59:22,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:59:22,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:59:22,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:59:22,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:59:22,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:59:22,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:59:22,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:59:22,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:59:22,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:59:22,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:59:22,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:59:22,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:59:22,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:59:22,301 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:59:22,302 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:59:22,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array6_pattern.c [2022-01-10 03:59:22,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2898ca670/9396dd7e27ac4e558f72a47ea0bf871d/FLAGc5f04d60a [2022-01-10 03:59:22,740 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:59:22,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c [2022-01-10 03:59:22,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2898ca670/9396dd7e27ac4e558f72a47ea0bf871d/FLAGc5f04d60a [2022-01-10 03:59:22,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2898ca670/9396dd7e27ac4e558f72a47ea0bf871d [2022-01-10 03:59:22,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:59:22,770 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:59:22,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:59:22,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:59:22,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:59:22,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:22,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c43fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22, skipping insertion in model container [2022-01-10 03:59:22,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:22,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:59:22,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:59:22,910 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c[1356,1369] [2022-01-10 03:59:22,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:59:22,956 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:59:22,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array6_pattern.c[1356,1369] [2022-01-10 03:59:22,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:59:22,993 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:59:22,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22 WrapperNode [2022-01-10 03:59:22,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:59:22,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:59:22,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:59:22,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:59:23,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,028 INFO L137 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-01-10 03:59:23,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:59:23,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:59:23,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:59:23,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:59:23,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:59:23,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:59:23,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:59:23,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:59:23,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (1/1) ... [2022-01-10 03:59:23,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:59:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:59:23,086 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 03:59:23,088 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 03:59:23,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:59:23,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:59:23,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:59:23,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:59:23,174 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:59:23,175 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:59:23,364 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:59:23,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:59:23,368 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:59:23,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:23 BoogieIcfgContainer [2022-01-10 03:59:23,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:59:23,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:59:23,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:59:23,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:59:23,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:59:22" (1/3) ... [2022-01-10 03:59:23,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cacc3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:59:23, skipping insertion in model container [2022-01-10 03:59:23,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:22" (2/3) ... [2022-01-10 03:59:23,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cacc3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:59:23, skipping insertion in model container [2022-01-10 03:59:23,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:23" (3/3) ... [2022-01-10 03:59:23,376 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-01-10 03:59:23,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:59:23,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:59:23,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:59:23,414 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 03:59:23,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:59:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:59:23,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:23,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:59:23,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash -800294020, now seen corresponding path program 1 times [2022-01-10 03:59:23,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:23,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234194190] [2022-01-10 03:59:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:59:23,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:23,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:23,451 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 03:59:23,452 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 03:59:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:59:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:59:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:23,592 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 03:59:23,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:59:23,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234194190] [2022-01-10 03:59:23,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234194190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:59:23,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:59:23,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:59:23,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454692731] [2022-01-10 03:59:23,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:59:23,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:59:23,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:59:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:59:23,626 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:59:23,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:23,642 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-01-10 03:59:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:59:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-10 03:59:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:23,649 INFO L225 Difference]: With dead ends: 47 [2022-01-10 03:59:23,649 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 03:59:23,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 03:59:23,655 INFO L933 BasicCegarLoop]: 28 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, 28 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 03:59:23,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:59:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 03:59:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 03:59:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-10 03:59:23,690 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-01-10 03:59:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:23,690 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-10 03:59:23,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:59:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-10 03:59:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 03:59:23,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:23,692 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 03:59:23,699 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 03:59:23,899 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 03:59:23,899 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -952637313, now seen corresponding path program 1 times [2022-01-10 03:59:23,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:23,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761066833] [2022-01-10 03:59:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:59:23,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:23,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:23,902 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 03:59:23,906 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 03:59:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:59:23,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:59:23,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:59:24,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:59:24,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:24,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761066833] [2022-01-10 03:59:24,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761066833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:59:24,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:59:24,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:59:24,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161698222] [2022-01-10 03:59:24,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:59:24,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:59:24,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:59:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:59:24,060 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:24,098 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-01-10 03:59:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:59:24,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-10 03:59:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:24,100 INFO L225 Difference]: With dead ends: 26 [2022-01-10 03:59:24,101 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 03:59:24,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:59:24,102 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:24,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:59:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 03:59:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 03:59:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-10 03:59:24,112 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 22 [2022-01-10 03:59:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:24,113 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-10 03:59:24,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-10 03:59:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:59:24,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:24,114 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, 1] [2022-01-10 03:59:24,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:59:24,316 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 03:59:24,316 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -603190335, now seen corresponding path program 1 times [2022-01-10 03:59:24,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:24,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300355642] [2022-01-10 03:59:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:59:24,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:24,319 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 03:59:24,321 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 03:59:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:59:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:59:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:59:24,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:59:24,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:24,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300355642] [2022-01-10 03:59:24,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300355642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:59:24,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:59:24,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:59:24,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63180064] [2022-01-10 03:59:24,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:59:24,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:59:24,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:59:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:59:24,591 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:24,602 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-10 03:59:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:59:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-01-10 03:59:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:24,604 INFO L225 Difference]: With dead ends: 43 [2022-01-10 03:59:24,605 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 03:59:24,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:59:24,607 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:24,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2022-01-10 03:59:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 03:59:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 03:59:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 03:59:24,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-01-10 03:59:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:24,615 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 03:59:24,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 03:59:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 03:59:24,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:24,616 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, 1, 1, 1] [2022-01-10 03:59:24,625 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 03:59:24,823 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 03:59:24,824 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1366149955, now seen corresponding path program 1 times [2022-01-10 03:59:24,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217634651] [2022-01-10 03:59:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:59:24,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:24,826 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 03:59:24,828 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 03:59:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:59:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:59:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:59:25,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:25,363 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:25,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217634651] [2022-01-10 03:59:25,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217634651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:59:25,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239318889] [2022-01-10 03:59:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:59:25,364 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:59:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:59:25,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:59:25,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-01-10 03:59:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:59:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:59:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:59:25,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:25,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239318889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:59:25,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:59:25,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2022-01-10 03:59:25,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097169376] [2022-01-10 03:59:25,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:59:25,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:59:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:59:25,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:59:25,750 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:59:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:25,759 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-10 03:59:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 03:59:25,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-01-10 03:59:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:25,761 INFO L225 Difference]: With dead ends: 51 [2022-01-10 03:59:25,761 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 03:59:25,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:59:25,762 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:25,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-01-10 03:59:25,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 03:59:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 03:59:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-10 03:59:25,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2022-01-10 03:59:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:25,767 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-10 03:59:25,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:59:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-10 03:59:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:59:25,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:25,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:59:25,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 03:59:25,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:59:26,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 03:59:26,172 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash -178408891, now seen corresponding path program 2 times [2022-01-10 03:59:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:26,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457525996] [2022-01-10 03:59:26,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:59:26,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:26,175 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 03:59:26,176 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 03:59:26,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:59:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:59:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:59:26,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:59:26,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457525996] [2022-01-10 03:59:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457525996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:59:26,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:59:26,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-01-10 03:59:26,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785992402] [2022-01-10 03:59:26,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:59:26,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:59:26,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:59:26,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:59:26,833 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:59:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:26,943 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-01-10 03:59:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:59:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-01-10 03:59:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:26,946 INFO L225 Difference]: With dead ends: 49 [2022-01-10 03:59:26,946 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 03:59:26,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:59:26,947 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:26,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 101 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-01-10 03:59:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 03:59:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-01-10 03:59:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-01-10 03:59:26,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2022-01-10 03:59:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:26,952 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-01-10 03:59:26,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:59:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-01-10 03:59:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 03:59:26,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:26,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:59:26,963 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 03:59:27,166 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 03:59:27,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash 400980999, now seen corresponding path program 3 times [2022-01-10 03:59:27,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:27,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091320273] [2022-01-10 03:59:27,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:59:27,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:27,168 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 03:59:27,169 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 03:59:27,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:59:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:59:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:59:27,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:28,059 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:28,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091320273] [2022-01-10 03:59:28,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091320273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:59:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599006331] [2022-01-10 03:59:28,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:59:28,060 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:59:28,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:59:28,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:59:28,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-01-10 03:59:28,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:59:28,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:59:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:59:28,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:59:29,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599006331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:59:29,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 03:59:29,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 20 [2022-01-10 03:59:29,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374071159] [2022-01-10 03:59:29,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 03:59:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:59:29,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:29,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:59:29,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:59:29,118 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 03:59:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:29,269 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-01-10 03:59:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 03:59:29,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-01-10 03:59:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:29,271 INFO L225 Difference]: With dead ends: 39 [2022-01-10 03:59:29,271 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 03:59:29,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:59:29,272 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:29,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2022-01-10 03:59:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 03:59:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-01-10 03:59:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-10 03:59:29,276 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2022-01-10 03:59:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:29,276 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-10 03:59:29,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 03:59:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-10 03:59:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 03:59:29,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:29,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:59:29,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:59:29,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:59:29,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:59:29,683 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1151083191, now seen corresponding path program 4 times [2022-01-10 03:59:29,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:29,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915355832] [2022-01-10 03:59:29,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:59:29,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:29,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:29,685 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 03:59:29,686 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 03:59:29,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:59:29,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:29,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:59:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 03:59:30,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:30,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915355832] [2022-01-10 03:59:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915355832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:59:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1056886728] [2022-01-10 03:59:30,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:59:30,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:59:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:59:30,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:59:30,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-01-10 03:59:30,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:59:30,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:59:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:59:30,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:59:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1056886728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:59:31,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 03:59:31,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 25 [2022-01-10 03:59:31,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653607347] [2022-01-10 03:59:31,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 03:59:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 03:59:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 03:59:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:59:31,056 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:59:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:31,444 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-01-10 03:59:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 03:59:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2022-01-10 03:59:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:31,446 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:59:31,446 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 03:59:31,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:59:31,447 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:31,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 41 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-01-10 03:59:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 03:59:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 03:59:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:59:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-10 03:59:31,451 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2022-01-10 03:59:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:31,451 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-10 03:59:31,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:59:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-10 03:59:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:59:31,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:31,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:59:31,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:59:31,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 03:59:31,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:59:31,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1722352949, now seen corresponding path program 5 times [2022-01-10 03:59:31,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:31,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938474250] [2022-01-10 03:59:31,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:59:31,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:31,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:31,857 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 03:59:31,857 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 03:59:32,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-10 03:59:32,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:32,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-10 03:59:32,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:32,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 03:59:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,288 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2022-01-10 03:59:32,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2022-01-10 03:59:32,303 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 35 treesize of output 34 [2022-01-10 03:59:32,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-10 03:59:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:32,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 72 [2022-01-10 03:59:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:33,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:33,890 INFO L353 Elim1Store]: treesize reduction 137, result has 9.3 percent of original size [2022-01-10 03:59:33,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 183 treesize of output 154 [2022-01-10 03:59:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:36,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:36,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:36,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:36,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:36,169 INFO L353 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2022-01-10 03:59:36,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 130 treesize of output 50 [2022-01-10 03:59:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:59:36,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:43,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:59:43,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938474250] [2022-01-10 03:59:43,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938474250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:59:43,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18063080] [2022-01-10 03:59:43,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:59:43,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:59:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:59:43,168 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:59:43,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-01-10 03:59:43,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-10 03:59:43,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 03:59:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:44,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 03:59:44,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:44,185 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2022-01-10 03:59:44,191 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 0 case distinctions, treesize of input 36 treesize of output 36 [2022-01-10 03:59:44,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2022-01-10 03:59:44,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-01-10 03:59:45,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,121 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 67 [2022-01-10 03:59:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 [2022-01-10 03:59:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 57 [2022-01-10 03:59:45,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,894 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2022-01-10 03:59:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 28 [2022-01-10 03:59:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:45,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 60 [2022-01-10 03:59:49,703 INFO L353 Elim1Store]: treesize reduction 53, result has 8.6 percent of original size [2022-01-10 03:59:49,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 393 treesize of output 257 [2022-01-10 03:59:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-01-10 03:59:49,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 151 [2022-01-10 03:59:49,824 INFO L353 Elim1Store]: treesize reduction 109, result has 16.2 percent of original size [2022-01-10 03:59:49,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 205 treesize of output 215 [2022-01-10 03:59:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:49,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:49,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 118 [2022-01-10 03:59:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:49,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 72 [2022-01-10 03:59:49,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-10 03:59:49,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-01-10 03:59:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:50,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2022-01-10 03:59:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:50,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 44 [2022-01-10 03:59:50,160 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 03:59:50,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 161 [2022-01-10 03:59:50,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 64 [2022-01-10 03:59:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:51,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:51,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:51,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:51,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 03:59:51,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:59:51,939 INFO L353 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2022-01-10 03:59:51,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 55 [2022-01-10 03:59:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:59:51,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:59:52,321 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 (Array (_ BitVec 64) (_ BitVec 32))) (v_ArrVal_304 (Array (_ BitVec 64) (_ BitVec 32)))) (let ((.cse0 ((_ sign_extend 32) (_ bv2 32)))) (= (bvadd ((_ sign_extend 32) (_ bv4294967294 32)) .cse0) (let ((.cse11 ((_ sign_extend 16) |c_ULTIMATE.start_main_~index~0#1|))) (let ((.cse7 (bvmul (_ bv4 64) ((_ sign_extend 48) |c_ULTIMATE.start_main_~index~0#1|))) (.cse9 (bvmul (_ bv4 64) ((_ sign_extend 32) (bvadd .cse11 (_ bv4294967295 32))))) (.cse8 (bvmul ((_ sign_extend 32) (bvadd .cse11 (_ bv1 32))) (_ bv4 64)))) (let ((.cse3 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_302) |c_ULTIMATE.start_main_~#array2~0#1.base|) (bvadd .cse7 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_304) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (bvadd (select .cse10 (bvadd .cse9 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse10 (bvadd .cse8 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))))) (let ((.cse2 (bvmul (_ bv4 64) .cse0)) (.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse6 (bvadd .cse7 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (bvadd (select .cse6 (bvadd .cse8 |c_ULTIMATE.start_main_~#array1~0#1.offset|)) (select .cse6 (bvadd .cse9 |c_ULTIMATE.start_main_~#array1~0#1.offset|)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse3) |c_ULTIMATE.start_main_~#array1~0#1.base|)) (.cse4 (bvmul ((_ sign_extend 32) (_ bv0 32)) (_ bv4 64))) (.cse5 (bvmul ((_ sign_extend 32) (_ bv1 32)) (_ bv4 64)))) (bvadd ((_ sign_extend 32) (select .cse1 (bvadd .cse2 |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse3 (bvadd .cse4 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse3 (bvadd .cse2 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) ((_ sign_extend 32) (select .cse1 (bvadd |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse5))) ((_ sign_extend 32) (select .cse1 (bvadd .cse4 |c_ULTIMATE.start_main_~#array1~0#1.offset|))) ((_ sign_extend 32) (select .cse3 (bvadd |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse5))) |c_ULTIMATE.start_main_~sum~0#1|)))))))) is different from false [2022-01-10 03:59:57,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18063080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:59:57,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:59:57,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 33 [2022-01-10 03:59:57,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601852280] [2022-01-10 03:59:57,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:59:57,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-10 03:59:57,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:59:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-10 03:59:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1622, Unknown=12, NotChecked=82, Total=1892 [2022-01-10 03:59:57,797 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:59:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:59:58,240 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-01-10 03:59:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 03:59:58,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-01-10 03:59:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:59:58,241 INFO L225 Difference]: With dead ends: 59 [2022-01-10 03:59:58,241 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 03:59:58,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=176, Invalid=1622, Unknown=12, NotChecked=82, Total=1892 [2022-01-10 03:59:58,242 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:59:58,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 264 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-01-10 03:59:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 03:59:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-01-10 03:59:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:59:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-01-10 03:59:58,250 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 34 [2022-01-10 03:59:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:59:58,250 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-01-10 03:59:58,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 29 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:59:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-01-10 03:59:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 03:59:58,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:59:58,251 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:59:58,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-01-10 03:59:58,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 03:59:58,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:59:58,656 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:59:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:59:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1565541619, now seen corresponding path program 6 times [2022-01-10 03:59:58,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:59:58,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420727630] [2022-01-10 03:59:58,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:59:58,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:59:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:59:58,658 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 03:59:58,659 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 03:59:58,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-10 03:59:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:59:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:59:58,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:59:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:59:59,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:00:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 04:00:01,171 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:01,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420727630] [2022-01-10 04:00:01,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420727630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:00:01,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:00:01,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-01-10 04:00:01,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782275762] [2022-01-10 04:00:01,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:00:01,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 04:00:01,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:01,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 04:00:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2022-01-10 04:00:01,173 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 04:00:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:03,913 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2022-01-10 04:00:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 04:00:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-01-10 04:00:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:03,915 INFO L225 Difference]: With dead ends: 119 [2022-01-10 04:00:03,915 INFO L226 Difference]: Without dead ends: 105 [2022-01-10 04:00:03,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 04:00:03,916 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 176 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:03,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 298 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 171 Invalid, 0 Unknown, 156 Unchecked, 0.8s Time] [2022-01-10 04:00:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-10 04:00:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2022-01-10 04:00:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 04:00:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-01-10 04:00:03,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 36 [2022-01-10 04:00:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:03,928 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-01-10 04:00:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 04:00:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-01-10 04:00:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 04:00:03,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:03,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:03,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 04:00:04,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:00:04,131 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash -956776499, now seen corresponding path program 7 times [2022-01-10 04:00:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435911045] [2022-01-10 04:00:04,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 04:00:04,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:04,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:04,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:00:04,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 04:00:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:00:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 04:00:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:00:05,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:00:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 04:00:07,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:00:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435911045] [2022-01-10 04:00:07,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435911045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:00:07,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:00:07,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2022-01-10 04:00:07,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87316009] [2022-01-10 04:00:07,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:00:07,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 04:00:07,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:00:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 04:00:07,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-01-10 04:00:07,358 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 04:00:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:00:12,065 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2022-01-10 04:00:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-10 04:00:12,065 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-01-10 04:00:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:00:12,066 INFO L225 Difference]: With dead ends: 134 [2022-01-10 04:00:12,067 INFO L226 Difference]: Without dead ends: 130 [2022-01-10 04:00:12,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=551, Invalid=1899, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 04:00:12,068 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 04:00:12,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 276 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 105 Invalid, 0 Unknown, 280 Unchecked, 1.2s Time] [2022-01-10 04:00:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-10 04:00:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 93. [2022-01-10 04:00:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 04:00:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2022-01-10 04:00:12,091 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 36 [2022-01-10 04:00:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:00:12,091 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2022-01-10 04:00:12,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 04:00:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2022-01-10 04:00:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 04:00:12,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:00:12,092 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:00:12,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 04:00:12,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:00:12,295 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:00:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:00:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -285980785, now seen corresponding path program 8 times [2022-01-10 04:00:12,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:00:12,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652780356] [2022-01-10 04:00:12,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:00:12,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:00:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:00:12,298 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:00:12,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 04:00:12,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:00:12,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:00:12,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-10 04:00:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:00:12,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 04:00:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:13,079 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 39 [2022-01-10 04:00:13,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2022-01-10 04:00:13,103 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 35 treesize of output 34 [2022-01-10 04:00:13,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:13,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:13,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2022-01-10 04:00:14,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:14,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:14,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:14,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:14,413 INFO L353 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-01-10 04:00:14,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 103 treesize of output 92 [2022-01-10 04:00:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:15,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:15,341 INFO L353 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2022-01-10 04:00:15,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 115 treesize of output 115 [2022-01-10 04:00:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:17,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:17,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 04:00:17,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:17,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 04:00:18,051 INFO L353 Elim1Store]: treesize reduction 1211, result has 10.8 percent of original size [2022-01-10 04:00:18,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 12 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 73 case distinctions, treesize of input 223 treesize of output 275