/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-fpi/condm.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:02:27,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:02:27,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:02:27,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 04:02:27,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 04:02:27,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 04:02:27,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 04:02:27,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 04:02:27,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 04:02:27,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 04:02:27,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 04:02:27,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 04:02:27,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:02:27,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:02:27,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:02:27,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:02:27,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:02:27,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:02:27,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:02:27,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:02:27,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:02:27,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:02:27,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:02:27,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:02:27,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 04:02:27,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:02:27,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:02:27,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:02:27,525 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 04:02:27,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:02:27,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:02:27,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:02:27,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:02:27,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:02:27,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:02:27,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:02:27,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:02:27,544 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:02:27,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:02:27,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:02:27,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:02:27,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:02:27,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:02:27,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:02:27,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:02:27,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:02:27,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:02:27,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:02:27,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:02:27,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:02:27,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:02:27,761 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:02:27,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condm.c [2022-01-10 04:02:27,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05d63af0/749e4007430f4a9dbd9bafb2ec71b876/FLAGcf765e3ad [2022-01-10 04:02:28,171 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:02:28,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condm.c [2022-01-10 04:02:28,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05d63af0/749e4007430f4a9dbd9bafb2ec71b876/FLAGcf765e3ad [2022-01-10 04:02:28,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05d63af0/749e4007430f4a9dbd9bafb2ec71b876 [2022-01-10 04:02:28,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:02:28,194 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:02:28,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:02:28,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:02:28,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:02:28,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636cdd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28, skipping insertion in model container [2022-01-10 04:02:28,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:02:28,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:02:28,354 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-fpi/condm.c[588,601] [2022-01-10 04:02:28,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:02:28,395 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:02:28,405 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-fpi/condm.c[588,601] [2022-01-10 04:02:28,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:02:28,434 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:02:28,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28 WrapperNode [2022-01-10 04:02:28,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:02:28,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:02:28,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:02:28,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:02:28,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,473 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-01-10 04:02:28,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:02:28,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:02:28,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:02:28,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:02:28,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:02:28,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:02:28,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:02:28,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:02:28,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (1/1) ... [2022-01-10 04:02:28,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:02:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:02:28,538 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 04:02:28,558 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 04:02:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:02:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:02:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 04:02:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 04:02:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:02:28,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:02:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 04:02:28,614 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:02:28,615 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:02:28,723 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:02:28,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:02:28,727 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 04:02:28,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:02:28 BoogieIcfgContainer [2022-01-10 04:02:28,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:02:28,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:02:28,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:02:28,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:02:28,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:02:28" (1/3) ... [2022-01-10 04:02:28,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9d3dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:02:28, skipping insertion in model container [2022-01-10 04:02:28,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:02:28" (2/3) ... [2022-01-10 04:02:28,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9d3dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:02:28, skipping insertion in model container [2022-01-10 04:02:28,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:02:28" (3/3) ... [2022-01-10 04:02:28,739 INFO L111 eAbstractionObserver]: Analyzing ICFG condm.c [2022-01-10 04:02:28,742 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:02:28,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:02:28,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:02:28,789 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 04:02:28,790 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:02:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 04:02:28,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:28,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:28,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:28,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2022-01-10 04:02:28,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:28,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700508564] [2022-01-10 04:02:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:02:28,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:28,839 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 04:02:28,841 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 04:02:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:02:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 04:02:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:28,978 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 04:02:28,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:02:28,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:02:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700508564] [2022-01-10 04:02:28,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700508564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:02:28,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:02:28,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:02:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833643031] [2022-01-10 04:02:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:02:28,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 04:02:28,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:02:29,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 04:02:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:02:29,006 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:02:29,018 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-01-10 04:02:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 04:02:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 04:02:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:02:29,031 INFO L225 Difference]: With dead ends: 40 [2022-01-10 04:02:29,031 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 04:02:29,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 04:02:29,037 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:02:29,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:02:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 04:02:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 04:02:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-01-10 04:02:29,064 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-01-10 04:02:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:02:29,065 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-01-10 04:02:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-01-10 04:02:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 04:02:29,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:29,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:29,075 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 04:02:29,271 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 04:02:29,272 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:29,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2022-01-10 04:02:29,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:29,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975740136] [2022-01-10 04:02:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:02:29,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:29,275 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 04:02:29,276 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 04:02:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:02:29,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 04:02:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:29,492 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 04:02:29,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:02:29,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:02:29,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975740136] [2022-01-10 04:02:29,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975740136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:02:29,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:02:29,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 04:02:29,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023178948] [2022-01-10 04:02:29,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:02:29,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 04:02:29,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:02:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 04:02:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:02:29,495 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:02:29,632 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-01-10 04:02:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 04:02:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 04:02:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:02:29,634 INFO L225 Difference]: With dead ends: 40 [2022-01-10 04:02:29,634 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 04:02:29,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:02:29,635 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:02:29,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 04:02:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 04:02:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-01-10 04:02:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-10 04:02:29,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-01-10 04:02:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:02:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-10 04:02:29,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-10 04:02:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 04:02:29,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:29,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:29,653 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 04:02:29,853 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 04:02:29,854 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2022-01-10 04:02:29,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:29,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694331044] [2022-01-10 04:02:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:02:29,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:29,857 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 04:02:29,858 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 04:02:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:02:29,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 04:02:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:29,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 04:02:30,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2022-01-10 04:02:30,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2022-01-10 04:02:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:30,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:02:30,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-10 04:02:30,486 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 49 treesize of output 42 [2022-01-10 04:02:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:30,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:02:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694331044] [2022-01-10 04:02:30,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694331044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:02:30,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:02:30,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-01-10 04:02:30,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404789419] [2022-01-10 04:02:30,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:02:30,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:02:30,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:02:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:02:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:02:30,560 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:35,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:02:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:02:37,463 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2022-01-10 04:02:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 04:02:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 04:02:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:02:37,464 INFO L225 Difference]: With dead ends: 68 [2022-01-10 04:02:37,464 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 04:02:37,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2022-01-10 04:02:37,466 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:02:37,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 75 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 04:02:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 04:02:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 29. [2022-01-10 04:02:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-10 04:02:37,477 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2022-01-10 04:02:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:02:37,478 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-10 04:02:37,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-10 04:02:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 04:02:37,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:37,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:37,485 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 04:02:37,679 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 04:02:37,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash -596215012, now seen corresponding path program 1 times [2022-01-10 04:02:37,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:37,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195338516] [2022-01-10 04:02:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:02:37,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:37,682 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 04:02:37,684 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 04:02:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:02:37,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 04:02:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:37,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:02:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 04:02:38,081 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:02:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195338516] [2022-01-10 04:02:38,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195338516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:02:38,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:02:38,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2022-01-10 04:02:38,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926611355] [2022-01-10 04:02:38,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:02:38,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 04:02:38,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:02:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 04:02:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-10 04:02:38,083 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:02:39,378 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2022-01-10 04:02:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 04:02:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-10 04:02:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:02:39,380 INFO L225 Difference]: With dead ends: 101 [2022-01-10 04:02:39,380 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 04:02:39,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 04:02:39,382 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:02:39,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 55 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 04:02:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 04:02:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2022-01-10 04:02:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-01-10 04:02:39,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 20 [2022-01-10 04:02:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:02:39,390 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-01-10 04:02:39,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-01-10 04:02:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 04:02:39,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:39,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:39,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 04:02:39,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:02:39,599 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1344001096, now seen corresponding path program 2 times [2022-01-10 04:02:39,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:39,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519284767] [2022-01-10 04:02:39,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:02:39,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:39,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:39,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:02:39,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 04:02:39,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 04:02:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:02:39,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 04:02:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 04:02:39,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:02:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:40,297 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:02:40,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519284767] [2022-01-10 04:02:40,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519284767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:02:40,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:02:40,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-01-10 04:02:40,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685283081] [2022-01-10 04:02:40,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:02:40,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 04:02:40,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:02:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 04:02:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-10 04:02:40,298 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:02:42,709 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2022-01-10 04:02:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-10 04:02:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-10 04:02:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:02:42,711 INFO L225 Difference]: With dead ends: 207 [2022-01-10 04:02:42,711 INFO L226 Difference]: Without dead ends: 173 [2022-01-10 04:02:42,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=830, Invalid=2362, Unknown=0, NotChecked=0, Total=3192 [2022-01-10 04:02:42,713 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 480 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 04:02:42,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 125 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 04:02:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-10 04:02:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 87. [2022-01-10 04:02:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.244186046511628) internal successors, (107), 86 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-01-10 04:02:42,742 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 25 [2022-01-10 04:02:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:02:42,743 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-01-10 04:02:42,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-01-10 04:02:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 04:02:42,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:42,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:42,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 04:02:42,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:02:42,948 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 1 times [2022-01-10 04:02:42,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:42,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882391968] [2022-01-10 04:02:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:02:42,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:42,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:42,953 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 04:02:42,955 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 04:02:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:02:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 04:02:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:43,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 04:02:43,182 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:02:43,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-10 04:02:43,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2022-01-10 04:02:43,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2022-01-10 04:02:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:43,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:02:44,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-10 04:02:44,017 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 288 treesize of output 274 [2022-01-10 04:02:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:44,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:02:44,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882391968] [2022-01-10 04:02:44,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882391968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:02:44,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:02:44,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2022-01-10 04:02:44,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92025894] [2022-01-10 04:02:44,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:02:44,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 04:02:44,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:02:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 04:02:44,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 04:02:44,266 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:46,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:02:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:02:47,875 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2022-01-10 04:02:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 04:02:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 04:02:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:02:47,876 INFO L225 Difference]: With dead ends: 144 [2022-01-10 04:02:47,876 INFO L226 Difference]: Without dead ends: 97 [2022-01-10 04:02:47,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 04:02:47,877 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 195 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 84 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 04:02:47,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 137 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 314 Invalid, 1 Unknown, 41 Unchecked, 2.6s Time] [2022-01-10 04:02:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-10 04:02:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-01-10 04:02:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-01-10 04:02:47,885 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 26 [2022-01-10 04:02:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:02:47,886 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-01-10 04:02:47,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:02:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-01-10 04:02:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 04:02:47,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:02:47,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:02:47,895 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 04:02:48,087 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 04:02:48,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:02:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:02:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -562149382, now seen corresponding path program 3 times [2022-01-10 04:02:48,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:02:48,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808091837] [2022-01-10 04:02:48,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 04:02:48,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:02:48,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:02:48,089 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 04:02:48,091 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 04:02:48,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 04:02:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:02:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 04:02:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:02:48,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 04:02:48,240 INFO L353 Elim1Store]: treesize reduction 48, result has 22.6 percent of original size [2022-01-10 04:02:48,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-10 04:02:48,279 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:02:48,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-10 04:02:48,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2022-01-10 04:02:48,398 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:02:48,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-10 04:02:48,451 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:02:48,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-10 04:02:48,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2022-01-10 04:02:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:02:48,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:02:49,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 103 [2022-01-10 04:02:49,445 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 2725 treesize of output 2669 [2022-01-10 04:03:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:38,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:03:38,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808091837] [2022-01-10 04:03:38,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808091837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:03:38,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:03:38,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2022-01-10 04:03:38,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69366365] [2022-01-10 04:03:38,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:03:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 04:03:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:03:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 04:03:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-10 04:03:38,767 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:03:40,412 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2022-01-10 04:03:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 04:03:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 04:03:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:03:40,413 INFO L225 Difference]: With dead ends: 126 [2022-01-10 04:03:40,413 INFO L226 Difference]: Without dead ends: 124 [2022-01-10 04:03:40,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 04:03:40,417 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 04:03:40,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 122 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 168 Invalid, 0 Unknown, 168 Unchecked, 0.5s Time] [2022-01-10 04:03:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-10 04:03:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2022-01-10 04:03:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-01-10 04:03:40,427 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 27 [2022-01-10 04:03:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:03:40,427 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-01-10 04:03:40,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:03:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-01-10 04:03:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 04:03:40,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:03:40,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:03:40,435 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 04:03:40,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:03:40,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:03:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:03:40,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1857271344, now seen corresponding path program 1 times [2022-01-10 04:03:40,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:03:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776440770] [2022-01-10 04:03:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:03:40,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:03:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:03:40,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:03:40,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 04:03:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:03:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 04:03:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:03:40,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-10 04:03:40,817 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:03:40,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-10 04:03:40,915 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:03:40,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-10 04:03:40,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 40 treesize of output 18 [2022-01-10 04:03:41,053 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-10 04:03:41,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-10 04:03:41,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 30 [2022-01-10 04:03:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:03:41,261 INFO L328 TraceCheckSpWp]: Computing backward predicates...