/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:44:26,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:44:26,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:44:26,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 08:44:26,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:44:26,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:44:26,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:44:26,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:44:26,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:44:26,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:44:26,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:44:26,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:44:26,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:44:26,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:44:26,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:44:26,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:44:26,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:44:26,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:44:26,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:44:26,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:44:26,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 08:44:26,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:44:26,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:44:26,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:44:26,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:44:26,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:44:26,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:44:26,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:44:26,925 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:44:26,928 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:44:26,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:44:26,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:44:26,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:44:26,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:44:26,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 08:44:26,929 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:44:26,930 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:44:26,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:44:26,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 08:44:26,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:44:26,931 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 08:44:26,932 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:44:27,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:44:27,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:44:27,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:44:27,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:44:27,132 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:44:27,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-01-10 08:44:27,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f80a5e7b/72b8975ab28d4e51a2aee19add6a4a6f/FLAG53f2d6acb [2022-01-10 08:44:27,534 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:44:27,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-01-10 08:44:27,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f80a5e7b/72b8975ab28d4e51a2aee19add6a4a6f/FLAG53f2d6acb [2022-01-10 08:44:27,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f80a5e7b/72b8975ab28d4e51a2aee19add6a4a6f [2022-01-10 08:44:27,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:44:28,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 08:44:28,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:44:28,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:44:28,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:44:28,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:44:27" (1/1) ... [2022-01-10 08:44:28,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11135a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28, skipping insertion in model container [2022-01-10 08:44:28,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:44:27" (1/1) ... [2022-01-10 08:44:28,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:44:28,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:44:28,230 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-01-10 08:44:28,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:44:28,240 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:44:28,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c[625,638] [2022-01-10 08:44:28,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:44:28,284 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:44:28,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28 WrapperNode [2022-01-10 08:44:28,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:44:28,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:44:28,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:44:28,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:44:28,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,304 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-01-10 08:44:28,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:44:28,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:44:28,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:44:28,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:44:28,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:44:28,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:44:28,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:44:28,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:44:28,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:44:28,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:28,362 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 08:44:28,368 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 08:44:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:44:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:44:28,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:44:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:44:28,422 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:44:28,423 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:44:28,514 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:44:28,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:44:28,518 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 08:44:28,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:44:28 BoogieIcfgContainer [2022-01-10 08:44:28,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:44:28,520 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 08:44:28,520 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 08:44:28,521 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 08:44:28,523 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:44:28" (1/1) ... [2022-01-10 08:44:28,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:44:28 BasicIcfg [2022-01-10 08:44:28,565 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 08:44:28,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:44:28,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:44:28,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:44:28,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:44:27" (1/4) ... [2022-01-10 08:44:28,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f932989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:44:28, skipping insertion in model container [2022-01-10 08:44:28,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:44:28" (2/4) ... [2022-01-10 08:44:28,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f932989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:44:28, skipping insertion in model container [2022-01-10 08:44:28,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:44:28" (3/4) ... [2022-01-10 08:44:28,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f932989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:44:28, skipping insertion in model container [2022-01-10 08:44:28,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:44:28" (4/4) ... [2022-01-10 08:44:28,571 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.cTransformedIcfg [2022-01-10 08:44:28,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:44:28,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 08:44:28,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:44:28,608 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 08:44:28,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 08:44:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 08:44:28,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:28,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:28,620 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 551657624, now seen corresponding path program 1 times [2022-01-10 08:44:28,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:28,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278651194] [2022-01-10 08:44:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:28,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:28,846 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 08:44:28,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:28,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278651194] [2022-01-10 08:44:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278651194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:44:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:44:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:44:28,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641608493] [2022-01-10 08:44:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:44:28,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:44:28,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:44:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:44:28,886 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:28,981 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2022-01-10 08:44:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:44:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-10 08:44:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:28,987 INFO L225 Difference]: With dead ends: 39 [2022-01-10 08:44:28,987 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 08:44:28,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:44:28,991 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:28,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:44:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 08:44:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-01-10 08:44:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 08:44:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 08:44:29,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-01-10 08:44:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:29,012 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 08:44:29,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 08:44:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 08:44:29,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:29,013 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:29,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 08:44:29,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1888481578, now seen corresponding path program 1 times [2022-01-10 08:44:29,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:29,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753747212] [2022-01-10 08:44:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:29,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:29,396 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 08:44:29,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753747212] [2022-01-10 08:44:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753747212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608759523] [2022-01-10 08:44:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:29,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:29,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:29,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:29,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 08:44:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 08:44:29,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:29,581 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 08:44:29,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:29,696 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 08:44:29,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608759523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:29,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:29,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-01-10 08:44:29,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995826762] [2022-01-10 08:44:29,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:29,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 08:44:29,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:29,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 08:44:29,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-10 08:44:29,705 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:30,347 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2022-01-10 08:44:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 08:44:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 08:44:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:30,352 INFO L225 Difference]: With dead ends: 133 [2022-01-10 08:44:30,352 INFO L226 Difference]: Without dead ends: 131 [2022-01-10 08:44:30,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2022-01-10 08:44:30,357 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:30,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 37 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:44:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-10 08:44:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 45. [2022-01-10 08:44:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 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 08:44:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2022-01-10 08:44:30,374 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 12 [2022-01-10 08:44:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:30,375 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2022-01-10 08:44:30,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2022-01-10 08:44:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 08:44:30,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:30,378 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:30,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 08:44:30,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:30,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash -671214993, now seen corresponding path program 1 times [2022-01-10 08:44:30,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:30,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318104250] [2022-01-10 08:44:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:30,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 08:44:30,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318104250] [2022-01-10 08:44:30,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318104250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:44:30,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:44:30,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:44:30,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354964213] [2022-01-10 08:44:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:44:30,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:44:30,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:44:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:44:30,669 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:30,701 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-01-10 08:44:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:44:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 08:44:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:30,702 INFO L225 Difference]: With dead ends: 67 [2022-01-10 08:44:30,702 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 08:44:30,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:44:30,703 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:30,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:44:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 08:44:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-10 08:44:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-01-10 08:44:30,721 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 21 [2022-01-10 08:44:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-01-10 08:44:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-01-10 08:44:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 08:44:30,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:30,726 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:30,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 08:44:30,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1663675371, now seen corresponding path program 1 times [2022-01-10 08:44:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688254486] [2022-01-10 08:44:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:30,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 08:44:30,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:30,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688254486] [2022-01-10 08:44:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688254486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:44:30,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:44:30,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:44:30,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770642512] [2022-01-10 08:44:30,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:44:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:44:30,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:44:30,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:44:30,790 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:30,843 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2022-01-10 08:44:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:44:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 08:44:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:30,845 INFO L225 Difference]: With dead ends: 126 [2022-01-10 08:44:30,845 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 08:44:30,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:44:30,852 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:30,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:44:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 08:44:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2022-01-10 08:44:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 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 08:44:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2022-01-10 08:44:30,870 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 24 [2022-01-10 08:44:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:30,870 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2022-01-10 08:44:30,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2022-01-10 08:44:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 08:44:30,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:30,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:30,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 08:44:30,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:30,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2059795416, now seen corresponding path program 1 times [2022-01-10 08:44:30,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:30,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075681287] [2022-01-10 08:44:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:30,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 08:44:31,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075681287] [2022-01-10 08:44:31,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075681287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008419534] [2022-01-10 08:44:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:31,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:31,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:31,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 08:44:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:44:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 08:44:31,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 08:44:31,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008419534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:31,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:31,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-01-10 08:44:31,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296360820] [2022-01-10 08:44:31,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:31,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 08:44:31,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 08:44:31,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-10 08:44:31,528 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 08:44:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:33,366 INFO L93 Difference]: Finished difference Result 297 states and 395 transitions. [2022-01-10 08:44:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-10 08:44:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 24 [2022-01-10 08:44:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:33,368 INFO L225 Difference]: With dead ends: 297 [2022-01-10 08:44:33,368 INFO L226 Difference]: Without dead ends: 172 [2022-01-10 08:44:33,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1053, Invalid=4497, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 08:44:33,370 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 564 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:33,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 30 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:44:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-10 08:44:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 81. [2022-01-10 08:44:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-01-10 08:44:33,386 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 24 [2022-01-10 08:44:33,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:33,386 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-01-10 08:44:33,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 08:44:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-01-10 08:44:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 08:44:33,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:33,387 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:33,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 08:44:33,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:33,603 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:33,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1862811484, now seen corresponding path program 1 times [2022-01-10 08:44:33,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:33,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007471769] [2022-01-10 08:44:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:33,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 08:44:33,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007471769] [2022-01-10 08:44:33,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007471769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095879991] [2022-01-10 08:44:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:33,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:33,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:33,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 08:44:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:33,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 08:44:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 08:44:34,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 08:44:34,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095879991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:34,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:34,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 11 [2022-01-10 08:44:34,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590289435] [2022-01-10 08:44:34,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:34,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 08:44:34,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 08:44:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-10 08:44:34,425 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 08:44:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:34,644 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2022-01-10 08:44:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 08:44:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 39 [2022-01-10 08:44:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:34,646 INFO L225 Difference]: With dead ends: 171 [2022-01-10 08:44:34,646 INFO L226 Difference]: Without dead ends: 169 [2022-01-10 08:44:34,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-01-10 08:44:34,648 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:34,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 23 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:44:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-10 08:44:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 68. [2022-01-10 08:44:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 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 08:44:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2022-01-10 08:44:34,672 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 39 [2022-01-10 08:44:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:34,672 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2022-01-10 08:44:34,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 08:44:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2022-01-10 08:44:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 08:44:34,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:34,677 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:34,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 08:44:34,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:34,893 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:34,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1032015181, now seen corresponding path program 2 times [2022-01-10 08:44:34,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:34,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628507885] [2022-01-10 08:44:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:34,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:44:35,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628507885] [2022-01-10 08:44:35,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628507885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:35,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760689248] [2022-01-10 08:44:35,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:44:35,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:35,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:35,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 08:44:35,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 08:44:35,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:44:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 08:44:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 08:44:35,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:44:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760689248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:44:35,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:44:35,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-01-10 08:44:35,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374646314] [2022-01-10 08:44:35,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:44:35,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:44:35,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:44:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-10 08:44:35,372 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:35,413 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2022-01-10 08:44:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:44:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 08:44:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:35,414 INFO L225 Difference]: With dead ends: 127 [2022-01-10 08:44:35,414 INFO L226 Difference]: Without dead ends: 125 [2022-01-10 08:44:35,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-10 08:44:35,415 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:35,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:44:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-10 08:44:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-01-10 08:44:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 86 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2022-01-10 08:44:35,431 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 51 [2022-01-10 08:44:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:35,431 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2022-01-10 08:44:35,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:44:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2022-01-10 08:44:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:44:35,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:35,432 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 08:44:35,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 08:44:35,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:35,648 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1673015106, now seen corresponding path program 3 times [2022-01-10 08:44:35,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:35,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523421268] [2022-01-10 08:44:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:35,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 08:44:35,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523421268] [2022-01-10 08:44:35,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523421268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482730709] [2022-01-10 08:44:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 08:44:35,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:35,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:35,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:35,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 08:44:35,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 08:44:35,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:44:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 08:44:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 08:44:36,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 08:44:36,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482730709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:36,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:36,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 08:44:36,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272510824] [2022-01-10 08:44:36,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:36,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 08:44:36,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 08:44:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:44:36,173 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 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 08:44:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:36,312 INFO L93 Difference]: Finished difference Result 270 states and 329 transitions. [2022-01-10 08:44:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:44:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 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 66 [2022-01-10 08:44:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:36,313 INFO L225 Difference]: With dead ends: 270 [2022-01-10 08:44:36,313 INFO L226 Difference]: Without dead ends: 268 [2022-01-10 08:44:36,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-10 08:44:36,314 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:36,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:44:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-10 08:44:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 159. [2022-01-10 08:44:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2151898734177216) internal successors, (192), 158 states have internal predecessors, (192), 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 08:44:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2022-01-10 08:44:36,337 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 66 [2022-01-10 08:44:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:36,337 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2022-01-10 08:44:36,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 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 08:44:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2022-01-10 08:44:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 08:44:36,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:36,338 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 08:44:36,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 08:44:36,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:36,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -62617545, now seen corresponding path program 4 times [2022-01-10 08:44:36,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:36,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730167666] [2022-01-10 08:44:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:36,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 434 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-01-10 08:44:36,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:36,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730167666] [2022-01-10 08:44:36,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730167666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:36,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638999529] [2022-01-10 08:44:36,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 08:44:36,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:36,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:36,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:36,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 08:44:36,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 08:44:36,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:44:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:44:36,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-01-10 08:44:37,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-01-10 08:44:37,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638999529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:37,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:37,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-10 08:44:37,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503145976] [2022-01-10 08:44:37,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:37,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 08:44:37,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 08:44:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-10 08:44:37,533 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 08:44:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:37,828 INFO L93 Difference]: Finished difference Result 496 states and 603 transitions. [2022-01-10 08:44:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 08:44:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 120 [2022-01-10 08:44:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:37,829 INFO L225 Difference]: With dead ends: 496 [2022-01-10 08:44:37,829 INFO L226 Difference]: Without dead ends: 362 [2022-01-10 08:44:37,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-10 08:44:37,830 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 127 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 51 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:44:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-10 08:44:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2022-01-10 08:44:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.2053231939163498) internal successors, (317), 263 states have internal predecessors, (317), 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 08:44:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 317 transitions. [2022-01-10 08:44:37,874 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 317 transitions. Word has length 120 [2022-01-10 08:44:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:37,875 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 317 transitions. [2022-01-10 08:44:37,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 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 08:44:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 317 transitions. [2022-01-10 08:44:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 08:44:37,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:37,876 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 13, 12, 12, 12, 11, 11, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 08:44:37,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:44:38,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:38,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash -863767162, now seen corresponding path program 5 times [2022-01-10 08:44:38,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:38,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952496107] [2022-01-10 08:44:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:38,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 250 proven. 395 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2022-01-10 08:44:38,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952496107] [2022-01-10 08:44:38,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952496107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066664396] [2022-01-10 08:44:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 08:44:38,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:38,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:38,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:38,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 08:44:38,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-10 08:44:38,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:44:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 08:44:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 782 proven. 14 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2022-01-10 08:44:38,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 782 proven. 14 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2022-01-10 08:44:39,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066664396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:39,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:39,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 15 [2022-01-10 08:44:39,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266967720] [2022-01-10 08:44:39,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:39,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 08:44:39,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 08:44:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-01-10 08:44:39,024 INFO L87 Difference]: Start difference. First operand 264 states and 317 transitions. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 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 08:44:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:39,490 INFO L93 Difference]: Finished difference Result 1353 states and 1667 transitions. [2022-01-10 08:44:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 08:44:39,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 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 195 [2022-01-10 08:44:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:39,493 INFO L225 Difference]: With dead ends: 1353 [2022-01-10 08:44:39,494 INFO L226 Difference]: Without dead ends: 1094 [2022-01-10 08:44:39,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 380 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2022-01-10 08:44:39,495 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:39,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 33 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:44:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-10 08:44:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 581. [2022-01-10 08:44:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.1913793103448276) internal successors, (691), 580 states have internal predecessors, (691), 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 08:44:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 691 transitions. [2022-01-10 08:44:39,598 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 691 transitions. Word has length 195 [2022-01-10 08:44:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:39,598 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 691 transitions. [2022-01-10 08:44:39,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 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 08:44:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 691 transitions. [2022-01-10 08:44:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-01-10 08:44:39,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:39,602 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 47, 46, 46, 23, 22, 22, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 08:44:39,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-10 08:44:39,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:39,815 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:39,816 INFO L85 PathProgramCache]: Analyzing trace with hash 674713646, now seen corresponding path program 6 times [2022-01-10 08:44:39,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:39,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760313503] [2022-01-10 08:44:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:39,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2022-01-10 08:44:40,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760313503] [2022-01-10 08:44:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760313503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725057750] [2022-01-10 08:44:40,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 08:44:40,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:40,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:40,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 08:44:40,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 08:44:40,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:44:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:44:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 442 proven. 2 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2022-01-10 08:44:41,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16250 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 15806 trivial. 0 not checked. [2022-01-10 08:44:41,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725057750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:41,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:41,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-10 08:44:41,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126306164] [2022-01-10 08:44:41,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:41,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 08:44:41,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 08:44:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-10 08:44:41,965 INFO L87 Difference]: Start difference. First operand 581 states and 691 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 08:44:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:42,164 INFO L93 Difference]: Finished difference Result 1470 states and 1783 transitions. [2022-01-10 08:44:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 08:44:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 468 [2022-01-10 08:44:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:42,167 INFO L225 Difference]: With dead ends: 1470 [2022-01-10 08:44:42,167 INFO L226 Difference]: Without dead ends: 913 [2022-01-10 08:44:42,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 931 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-10 08:44:42,168 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:42,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:44:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-10 08:44:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 544. [2022-01-10 08:44:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.16390423572744) internal successors, (632), 543 states have internal predecessors, (632), 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 08:44:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 632 transitions. [2022-01-10 08:44:42,261 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 632 transitions. Word has length 468 [2022-01-10 08:44:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:42,261 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 632 transitions. [2022-01-10 08:44:42,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 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 08:44:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 632 transitions. [2022-01-10 08:44:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-01-10 08:44:42,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:42,267 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 47, 46, 46, 23, 22, 22, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 08:44:42,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 08:44:42,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 08:44:42,479 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 224496568, now seen corresponding path program 7 times [2022-01-10 08:44:42,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:42,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115305880] [2022-01-10 08:44:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:42,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 23675 backedges. 258 proven. 757 refuted. 0 times theorem prover too weak. 22660 trivial. 0 not checked. [2022-01-10 08:44:43,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:43,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115305880] [2022-01-10 08:44:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115305880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:43,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777764353] [2022-01-10 08:44:43,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 08:44:43,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:43,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:43,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 08:44:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 4053 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 08:44:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23675 backedges. 10706 proven. 1799 refuted. 0 times theorem prover too weak. 11170 trivial. 0 not checked. [2022-01-10 08:44:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23675 backedges. 10700 proven. 1804 refuted. 0 times theorem prover too weak. 11171 trivial. 0 not checked. [2022-01-10 08:44:45,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777764353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:45,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:45,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2022-01-10 08:44:45,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960195476] [2022-01-10 08:44:45,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:45,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 08:44:45,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 08:44:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-10 08:44:45,456 INFO L87 Difference]: Start difference. First operand 544 states and 632 transitions. Second operand has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 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 08:44:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:50,997 INFO L93 Difference]: Finished difference Result 2931 states and 3448 transitions. [2022-01-10 08:44:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-10 08:44:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 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 543 [2022-01-10 08:44:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:51,003 INFO L225 Difference]: With dead ends: 2931 [2022-01-10 08:44:51,003 INFO L226 Difference]: Without dead ends: 1930 [2022-01-10 08:44:51,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3816 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1965, Invalid=9165, Unknown=0, NotChecked=0, Total=11130 [2022-01-10 08:44:51,008 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 473 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:51,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 93 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 08:44:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-01-10 08:44:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1429. [2022-01-10 08:44:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.1295518207282913) internal successors, (1613), 1428 states have internal predecessors, (1613), 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 08:44:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1613 transitions. [2022-01-10 08:44:51,385 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1613 transitions. Word has length 543 [2022-01-10 08:44:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:44:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 1613 transitions. [2022-01-10 08:44:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 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 08:44:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1613 transitions. [2022-01-10 08:44:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-01-10 08:44:51,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:44:51,395 INFO L514 BasicCegarLoop]: trace histogram [179, 178, 178, 59, 58, 58, 23, 22, 22, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 08:44:51,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 08:44:51,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:51,610 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:44:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:44:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1386691606, now seen corresponding path program 8 times [2022-01-10 08:44:51,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:44:51,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248388038] [2022-01-10 08:44:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:44:51,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:44:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:44:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 65468 backedges. 48 proven. 12381 refuted. 0 times theorem prover too weak. 53039 trivial. 0 not checked. [2022-01-10 08:44:53,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:44:53,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248388038] [2022-01-10 08:44:53,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248388038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:44:53,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103035812] [2022-01-10 08:44:53,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:44:53,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:44:53,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:44:53,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:44:53,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 08:44:53,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:44:53,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:44:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 6261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 08:44:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:44:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 65468 backedges. 11988 proven. 395 refuted. 0 times theorem prover too weak. 53085 trivial. 0 not checked. [2022-01-10 08:44:55,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:44:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 65468 backedges. 11934 proven. 445 refuted. 0 times theorem prover too weak. 53089 trivial. 0 not checked. [2022-01-10 08:44:56,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103035812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:44:56,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:44:56,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-10 08:44:56,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508969618] [2022-01-10 08:44:56,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:44:56,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 08:44:56,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:44:56,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 08:44:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-10 08:44:56,265 INFO L87 Difference]: Start difference. First operand 1429 states and 1613 transitions. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 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 08:44:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:44:59,150 INFO L93 Difference]: Finished difference Result 5664 states and 6457 transitions. [2022-01-10 08:44:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 08:44:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 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 825 [2022-01-10 08:44:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:44:59,159 INFO L225 Difference]: With dead ends: 5664 [2022-01-10 08:44:59,159 INFO L226 Difference]: Without dead ends: 4251 [2022-01-10 08:44:59,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1684 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 08:44:59,161 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:44:59,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 70 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:44:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2022-01-10 08:45:00,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 4057. [2022-01-10 08:45:00,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4057 states, 4056 states have (on average 1.1148915187376727) internal successors, (4522), 4056 states have internal predecessors, (4522), 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 08:45:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4057 states to 4057 states and 4522 transitions. [2022-01-10 08:45:00,182 INFO L78 Accepts]: Start accepts. Automaton has 4057 states and 4522 transitions. Word has length 825 [2022-01-10 08:45:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:45:00,182 INFO L470 AbstractCegarLoop]: Abstraction has 4057 states and 4522 transitions. [2022-01-10 08:45:00,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 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 08:45:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4057 states and 4522 transitions. [2022-01-10 08:45:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2359 [2022-01-10 08:45:00,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:45:00,216 INFO L514 BasicCegarLoop]: trace histogram [537, 536, 536, 169, 168, 168, 66, 65, 65, 11, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2022-01-10 08:45:00,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 08:45:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 08:45:00,433 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:45:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:45:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1896317436, now seen corresponding path program 9 times [2022-01-10 08:45:00,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:45:00,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229148000] [2022-01-10 08:45:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:45:00,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:45:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:45:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 581841 backedges. 16 proven. 208338 refuted. 0 times theorem prover too weak. 373487 trivial. 0 not checked. [2022-01-10 08:45:13,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:45:13,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229148000] [2022-01-10 08:45:13,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229148000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:45:13,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694284851] [2022-01-10 08:45:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 08:45:13,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:45:13,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:45:13,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:45:13,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 08:45:14,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 08:45:14,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:45:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 08:45:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:45:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 581841 backedges. 205252 proven. 27 refuted. 0 times theorem prover too weak. 376562 trivial. 0 not checked. [2022-01-10 08:45:20,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:45:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 581841 backedges. 0 proven. 205279 refuted. 0 times theorem prover too weak. 376562 trivial. 0 not checked. [2022-01-10 08:45:29,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694284851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:45:29,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:45:29,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 20] total 38 [2022-01-10 08:45:29,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008182553] [2022-01-10 08:45:29,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:45:29,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-10 08:45:29,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:45:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-10 08:45:29,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 08:45:29,335 INFO L87 Difference]: Start difference. First operand 4057 states and 4522 transitions. Second operand has 38 states, 38 states have (on average 4.315789473684211) internal successors, (164), 38 states have internal predecessors, (164), 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)