/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:19:37,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:19:37,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:19:38,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:19:38,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:19:38,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:19:38,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:19:38,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:19:38,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:19:38,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:19:38,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:19:38,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:19:38,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:19:38,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:19:38,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:19:38,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:19:38,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:19:38,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:19:38,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:19:38,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:19:38,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:19:38,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:19:38,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:19:38,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:19:38,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:19:38,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:19:38,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:19:38,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:19:38,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:19:38,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:19:38,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:19:38,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:19:38,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:19:38,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:19:38,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:19:38,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:19:38,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:19:38,075 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:19:38,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:19:38,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:19:38,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:19:38,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:19:38,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:19:38,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:19:38,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:19:38,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:19:38,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:19:38,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:19:38,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:19:38,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:19:38,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:19:38,374 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:19:38,374 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:19:38,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condn.c [2022-01-09 23:19:38,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555ef23ed/48fe7eb47342465e9696b1671c6333bb/FLAGb7bc5a8bb [2022-01-09 23:19:38,964 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:19:38,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condn.c [2022-01-09 23:19:38,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555ef23ed/48fe7eb47342465e9696b1671c6333bb/FLAGb7bc5a8bb [2022-01-09 23:19:39,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555ef23ed/48fe7eb47342465e9696b1671c6333bb [2022-01-09 23:19:39,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:19:39,280 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:19:39,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:19:39,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:19:39,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:19:39,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2867a308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39, skipping insertion in model container [2022-01-09 23:19:39,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:19:39,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:19:39,482 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condn.c[588,601] [2022-01-09 23:19:39,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:19:39,521 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:19:39,532 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condn.c[588,601] [2022-01-09 23:19:39,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:19:39,563 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:19:39,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39 WrapperNode [2022-01-09 23:19:39,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:19:39,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:19:39,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:19:39,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:19:39,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,597 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2022-01-09 23:19:39,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:19:39,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:19:39,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:19:39,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:19:39,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:19:39,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:19:39,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:19:39,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:19:39,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (1/1) ... [2022-01-09 23:19:39,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:19:39,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:39,660 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) [2022-01-09 23:19:39,688 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 [2022-01-09 23:19:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:19:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:19:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:19:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 23:19:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:19:39,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:19:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:19:39,755 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:19:39,756 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:19:39,913 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:19:39,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:19:39,918 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:19:39,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:19:39 BoogieIcfgContainer [2022-01-09 23:19:39,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:19:39,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:19:39,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:19:39,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:19:39,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:19:39" (1/3) ... [2022-01-09 23:19:39,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686b8f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:19:39, skipping insertion in model container [2022-01-09 23:19:39,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:39" (2/3) ... [2022-01-09 23:19:39,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686b8f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:19:39, skipping insertion in model container [2022-01-09 23:19:39,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:19:39" (3/3) ... [2022-01-09 23:19:39,927 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2022-01-09 23:19:39,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:19:39,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:19:39,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:19:40,001 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 [2022-01-09 23:19:40,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:19:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:19:40,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:40,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:40,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2022-01-09 23:19:40,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668432389] [2022-01-09 23:19:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:40,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:40,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:40,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668432389] [2022-01-09 23:19:40,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668432389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:19:40,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:19:40,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:19:40,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741404371] [2022-01-09 23:19:40,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:19:40,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:19:40,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:19:40,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:19:40,242 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:40,258 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-01-09 23:19:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:19:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-09 23:19:40,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:40,267 INFO L225 Difference]: With dead ends: 40 [2022-01-09 23:19:40,267 INFO L226 Difference]: Without dead ends: 18 [2022-01-09 23:19:40,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:19:40,275 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:40,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:40,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-09 23:19:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-09 23:19:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-01-09 23:19:40,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-01-09 23:19:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:40,303 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-01-09 23:19:40,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-01-09 23:19:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:19:40,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:40,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:40,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:19:40,306 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2022-01-09 23:19:40,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294066504] [2022-01-09 23:19:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:40,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:40,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:40,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294066504] [2022-01-09 23:19:40,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294066504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:19:40,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:19:40,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:19:40,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39134000] [2022-01-09 23:19:40,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:19:40,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:19:40,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:19:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:19:40,382 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:40,424 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-01-09 23:19:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:19:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-09 23:19:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:40,425 INFO L225 Difference]: With dead ends: 40 [2022-01-09 23:19:40,426 INFO L226 Difference]: Without dead ends: 29 [2022-01-09 23:19:40,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:19:40,427 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:40,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-09 23:19:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-01-09 23:19:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-09 23:19:40,433 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-01-09 23:19:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:40,433 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-09 23:19:40,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-09 23:19:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:19:40,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:40,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:40,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:19:40,435 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:40,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2022-01-09 23:19:40,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088232789] [2022-01-09 23:19:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:40,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:40,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088232789] [2022-01-09 23:19:40,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088232789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946361578] [2022-01-09 23:19:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:40,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:40,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:40,684 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) [2022-01-09 23:19:40,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:19:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 23:19:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:40,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2022-01-09 23:19:40,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-09 23:19:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:40,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:41,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-09 23:19:41,089 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-09 23:19:41,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 32 [2022-01-09 23:19:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:41,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946361578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:41,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:41,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-09 23:19:41,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454728579] [2022-01-09 23:19:41,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:41,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:19:41,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:19:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:19:41,119 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:41,374 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-01-09 23:19:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 23:19:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 23:19:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:41,376 INFO L225 Difference]: With dead ends: 47 [2022-01-09 23:19:41,376 INFO L226 Difference]: Without dead ends: 45 [2022-01-09 23:19:41,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:19:41,378 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:41,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 69 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 121 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-09 23:19:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-09 23:19:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2022-01-09 23:19:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-01-09 23:19:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-09 23:19:41,384 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-01-09 23:19:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:41,384 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-09 23:19:41,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-09 23:19:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 23:19:41,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:41,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:41,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:41,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:41,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2022-01-09 23:19:41,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:41,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495992114] [2022-01-09 23:19:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:41,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:41,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495992114] [2022-01-09 23:19:41,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495992114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43108442] [2022-01-09 23:19:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:41,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:41,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:41,719 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) [2022-01-09 23:19:41,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:19:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:41,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:19:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:41,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43108442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:41,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:41,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-09 23:19:41,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781225259] [2022-01-09 23:19:41,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:41,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:19:41,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:19:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:19:41,952 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:42,046 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-01-09 23:19:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:19:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-09 23:19:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:42,049 INFO L225 Difference]: With dead ends: 62 [2022-01-09 23:19:42,049 INFO L226 Difference]: Without dead ends: 38 [2022-01-09 23:19:42,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-09 23:19:42,053 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:42,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:19:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-09 23:19:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-01-09 23:19:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-09 23:19:42,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-01-09 23:19:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:42,072 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-09 23:19:42,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-09 23:19:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-09 23:19:42,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:42,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:42,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:42,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-09 23:19:42,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2022-01-09 23:19:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73954818] [2022-01-09 23:19:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:42,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:42,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73954818] [2022-01-09 23:19:42,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73954818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706269909] [2022-01-09 23:19:42,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:19:42,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:42,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:42,589 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) [2022-01-09 23:19:42,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:19:42,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:19:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:19:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:42,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-09 23:19:42,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-01-09 23:19:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:19:42,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:42,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-09 23:19:42,959 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-09 23:19:42,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2022-01-09 23:19:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:19:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706269909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:43,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:43,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 22 [2022-01-09 23:19:43,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897889053] [2022-01-09 23:19:43,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-09 23:19:43,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-09 23:19:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-09 23:19:43,007 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:44,140 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-01-09 23:19:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-09 23:19:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-09 23:19:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:44,142 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:19:44,142 INFO L226 Difference]: Without dead ends: 59 [2022-01-09 23:19:44,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2022-01-09 23:19:44,143 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:44,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 290 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-01-09 23:19:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-09 23:19:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2022-01-09 23:19:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-09 23:19:44,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2022-01-09 23:19:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:44,149 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-09 23:19:44,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-09 23:19:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 23:19:44,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:44,150 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:44,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:44,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:44,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2022-01-09 23:19:44,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:44,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417416886] [2022-01-09 23:19:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:44,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:19:44,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417416886] [2022-01-09 23:19:44,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417416886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604599367] [2022-01-09 23:19:44,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:19:44,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:44,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:44,453 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) [2022-01-09 23:19:44,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:19:44,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:19:44,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:19:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:19:44,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:19:44,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604599367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:44,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:44,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-09 23:19:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840212270] [2022-01-09 23:19:44,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:19:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:19:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:19:44,684 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:44,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:44,820 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-01-09 23:19:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:19:44,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-09 23:19:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:44,824 INFO L225 Difference]: With dead ends: 82 [2022-01-09 23:19:44,824 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 23:19:44,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:19:44,827 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:44,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 57 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:19:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 23:19:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-01-09 23:19:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-01-09 23:19:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-09 23:19:44,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-01-09 23:19:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:44,833 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-09 23:19:44,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-09 23:19:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-09 23:19:44,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:44,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:44,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:45,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:45,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2022-01-09 23:19:45,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144811607] [2022-01-09 23:19:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:45,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:45,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144811607] [2022-01-09 23:19:45,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144811607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:45,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206787786] [2022-01-09 23:19:45,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:19:45,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:45,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:45,391 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) [2022-01-09 23:19:45,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:19:45,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:19:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:45,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 23:19:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:45,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-01-09 23:19:45,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-09 23:19:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:19:45,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:46,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-09 23:19:46,014 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-09 23:19:46,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 36 [2022-01-09 23:19:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:19:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206787786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:46,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:46,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-01-09 23:19:46,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729085926] [2022-01-09 23:19:46,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-09 23:19:46,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:46,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-09 23:19:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-09 23:19:46,056 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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) [2022-01-09 23:19:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:46,730 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-01-09 23:19:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-09 23:19:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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 35 [2022-01-09 23:19:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:46,732 INFO L225 Difference]: With dead ends: 75 [2022-01-09 23:19:46,732 INFO L226 Difference]: Without dead ends: 73 [2022-01-09 23:19:46,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-01-09 23:19:46,733 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:46,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 145 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 473 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-01-09 23:19:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-09 23:19:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-01-09 23:19:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-01-09 23:19:46,739 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2022-01-09 23:19:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:46,740 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-01-09 23:19:46,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 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) [2022-01-09 23:19:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-01-09 23:19:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:19:46,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:46,741 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:46,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-09 23:19:46,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:46,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:46,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2022-01-09 23:19:46,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055173297] [2022-01-09 23:19:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:46,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:19:47,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055173297] [2022-01-09 23:19:47,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055173297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568776104] [2022-01-09 23:19:47,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:19:47,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:47,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:47,037 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) [2022-01-09 23:19:47,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:19:47,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-09 23:19:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 23:19:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:19:47,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 23:19:47,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568776104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:47,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:47,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-09 23:19:47,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280137673] [2022-01-09 23:19:47,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:47,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-09 23:19:47,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:47,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-09 23:19:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:19:47,347 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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) [2022-01-09 23:19:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:47,473 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-01-09 23:19:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:19:47,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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 [2022-01-09 23:19:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:47,474 INFO L225 Difference]: With dead ends: 102 [2022-01-09 23:19:47,474 INFO L226 Difference]: Without dead ends: 56 [2022-01-09 23:19:47,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:19:47,475 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:47,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 76 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:19:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-09 23:19:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2022-01-09 23:19:47,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-01-09 23:19:47,481 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2022-01-09 23:19:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:47,481 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-01-09 23:19:47,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 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) [2022-01-09 23:19:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-01-09 23:19:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:19:47,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:47,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:47,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-09 23:19:47,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:47,703 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2022-01-09 23:19:47,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244643630] [2022-01-09 23:19:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:47,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:48,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:48,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244643630] [2022-01-09 23:19:48,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244643630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:48,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397068397] [2022-01-09 23:19:48,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:19:48,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:48,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:48,080 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) [2022-01-09 23:19:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:19:48,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-09 23:19:48,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-09 23:19:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:48,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-09 23:19:48,665 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-09 23:19:48,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-09 23:19:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:19:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:49,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-01-09 23:19:49,204 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-09 23:19:49,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2022-01-09 23:19:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:19:49,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397068397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:49,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:49,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 41 [2022-01-09 23:19:49,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130113545] [2022-01-09 23:19:49,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:49,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-09 23:19:49,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-09 23:19:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:19:49,242 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 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) [2022-01-09 23:19:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:50,212 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2022-01-09 23:19:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-09 23:19:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 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 44 [2022-01-09 23:19:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:50,213 INFO L225 Difference]: With dead ends: 80 [2022-01-09 23:19:50,213 INFO L226 Difference]: Without dead ends: 60 [2022-01-09 23:19:50,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=787, Invalid=4469, Unknown=0, NotChecked=0, Total=5256 [2022-01-09 23:19:50,215 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:50,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 197 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 179 Invalid, 0 Unknown, 231 Unchecked, 0.1s Time] [2022-01-09 23:19:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-09 23:19:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2022-01-09 23:19:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 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) [2022-01-09 23:19:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-09 23:19:50,224 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 44 [2022-01-09 23:19:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:50,225 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-09 23:19:50,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 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) [2022-01-09 23:19:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-09 23:19:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:19:50,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:50,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:50,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:50,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:50,451 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1938709510, now seen corresponding path program 1 times [2022-01-09 23:19:50,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980756656] [2022-01-09 23:19:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:50,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:50,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980756656] [2022-01-09 23:19:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980756656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:50,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245713153] [2022-01-09 23:19:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:50,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:50,871 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) [2022-01-09 23:19:50,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:19:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:50,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-09 23:19:50,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:51,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-09 23:19:51,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-09 23:19:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:19:51,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:51,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:19:51,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-01-09 23:19:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:19:51,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245713153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:51,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:51,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 33 [2022-01-09 23:19:51,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409385500] [2022-01-09 23:19:51,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:51,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 23:19:51,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 23:19:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:19:51,584 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 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) [2022-01-09 23:19:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:52,503 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-01-09 23:19:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-09 23:19:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 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 44 [2022-01-09 23:19:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:52,507 INFO L225 Difference]: With dead ends: 92 [2022-01-09 23:19:52,507 INFO L226 Difference]: Without dead ends: 90 [2022-01-09 23:19:52,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=605, Invalid=3817, Unknown=0, NotChecked=0, Total=4422 [2022-01-09 23:19:52,510 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 190 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:52,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 238 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:19:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-09 23:19:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2022-01-09 23:19:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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) [2022-01-09 23:19:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-01-09 23:19:52,522 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 44 [2022-01-09 23:19:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:52,522 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-01-09 23:19:52,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 33 states have internal predecessors, (91), 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) [2022-01-09 23:19:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-01-09 23:19:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-09 23:19:52,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:52,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:52,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:52,743 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,SelfDestructingSolverStorable9 [2022-01-09 23:19:52,744 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:52,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1288199652, now seen corresponding path program 7 times [2022-01-09 23:19:52,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:52,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987027318] [2022-01-09 23:19:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:52,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 23:19:52,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987027318] [2022-01-09 23:19:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987027318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655873755] [2022-01-09 23:19:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:19:52,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:52,863 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) [2022-01-09 23:19:52,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:19:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:52,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 23:19:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 23:19:53,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 23:19:53,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655873755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:53,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:19:53,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-01-09 23:19:53,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475202131] [2022-01-09 23:19:53,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:53,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-09 23:19:53,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-09 23:19:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:19:53,249 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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) [2022-01-09 23:19:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:53,467 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2022-01-09 23:19:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 23:19:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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 47 [2022-01-09 23:19:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:53,468 INFO L225 Difference]: With dead ends: 152 [2022-01-09 23:19:53,468 INFO L226 Difference]: Without dead ends: 89 [2022-01-09 23:19:53,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:19:53,469 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:53,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 103 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:19:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-09 23:19:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2022-01-09 23:19:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 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) [2022-01-09 23:19:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-01-09 23:19:53,486 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 47 [2022-01-09 23:19:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:53,486 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-01-09 23:19:53,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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) [2022-01-09 23:19:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-01-09 23:19:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 23:19:53,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:53,489 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:53,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:53,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:53,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 534659294, now seen corresponding path program 8 times [2022-01-09 23:19:53,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:53,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317263649] [2022-01-09 23:19:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:53,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:54,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317263649] [2022-01-09 23:19:54,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317263649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:19:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403478757] [2022-01-09 23:19:54,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:19:54,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:54,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:54,285 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) [2022-01-09 23:19:54,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:19:54,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:19:54,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-09 23:19:54,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:54,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-09 23:19:54,793 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-09 23:19:54,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-09 23:19:55,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-09 23:19:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:19:55,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:18,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-01-09 23:20:18,275 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-09 23:20:18,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 90 [2022-01-09 23:20:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 52 refuted. 1 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:20:18,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403478757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:18,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:20:18,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 15] total 44 [2022-01-09 23:20:18,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835229619] [2022-01-09 23:20:18,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:18,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-09 23:20:18,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-09 23:20:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1671, Unknown=18, NotChecked=0, Total=1892 [2022-01-09 23:20:18,392 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 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) [2022-01-09 23:20:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:22,220 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-01-09 23:20:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-09 23:20:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 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 49 [2022-01-09 23:20:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:22,221 INFO L225 Difference]: With dead ends: 115 [2022-01-09 23:20:22,221 INFO L226 Difference]: Without dead ends: 113 [2022-01-09 23:20:22,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=738, Invalid=6214, Unknown=20, NotChecked=0, Total=6972 [2022-01-09 23:20:22,224 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 178 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:22,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 356 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1074 Invalid, 0 Unknown, 220 Unchecked, 0.5s Time] [2022-01-09 23:20:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-09 23:20:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2022-01-09 23:20:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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) [2022-01-09 23:20:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-01-09 23:20:22,232 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 49 [2022-01-09 23:20:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:22,232 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-01-09 23:20:22,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 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) [2022-01-09 23:20:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-01-09 23:20:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-09 23:20:22,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:22,233 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:22,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:22,447 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,SelfDestructingSolverStorable11 [2022-01-09 23:20:22,447 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:22,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 9 times [2022-01-09 23:20:22,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:22,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474140317] [2022-01-09 23:20:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:22,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:20:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:22,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:22,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474140317] [2022-01-09 23:20:22,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474140317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:20:22,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179029146] [2022-01-09 23:20:22,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:20:22,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:22,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:22,868 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) [2022-01-09 23:20:22,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:20:22,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-09 23:20:22,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-09 23:20:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:23,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-09 23:20:23,580 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-09 23:20:23,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-01-09 23:20:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:20:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:24,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-01-09 23:20:24,202 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-09 23:20:24,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2022-01-09 23:20:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 23:20:24,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179029146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:24,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:20:24,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 48 [2022-01-09 23:20:24,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992799769] [2022-01-09 23:20:24,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:24,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-09 23:20:24,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:24,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-09 23:20:24,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:20:24,244 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 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) [2022-01-09 23:20:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:26,692 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2022-01-09 23:20:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-09 23:20:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 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 53 [2022-01-09 23:20:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:26,695 INFO L225 Difference]: With dead ends: 157 [2022-01-09 23:20:26,695 INFO L226 Difference]: Without dead ends: 96 [2022-01-09 23:20:26,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4686 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1824, Invalid=13676, Unknown=0, NotChecked=0, Total=15500 [2022-01-09 23:20:26,699 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:26,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 293 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 343 Invalid, 0 Unknown, 332 Unchecked, 0.2s Time] [2022-01-09 23:20:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-09 23:20:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2022-01-09 23:20:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 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) [2022-01-09 23:20:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-01-09 23:20:26,708 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 53 [2022-01-09 23:20:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:26,708 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-01-09 23:20:26,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3958333333333335) internal successors, (115), 48 states have internal predecessors, (115), 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) [2022-01-09 23:20:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-01-09 23:20:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 23:20:26,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:26,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:26,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-09 23:20:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 23:20:26,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -273043412, now seen corresponding path program 10 times [2022-01-09 23:20:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:26,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517281239] [2022-01-09 23:20:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:26,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:20:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-09 23:20:27,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517281239] [2022-01-09 23:20:27,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517281239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:20:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030731909] [2022-01-09 23:20:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:20:27,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:27,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:20:27,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:20:27,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:20:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-09 23:20:27,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-09 23:20:27,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-09 23:20:27,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030731909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:27,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:20:27,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-01-09 23:20:27,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104393610] [2022-01-09 23:20:27,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:27,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-09 23:20:27,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-09 23:20:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:20:27,365 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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) [2022-01-09 23:20:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:27,534 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-01-09 23:20:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-09 23:20:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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 56 [2022-01-09 23:20:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:27,535 INFO L225 Difference]: With dead ends: 117 [2022-01-09 23:20:27,535 INFO L226 Difference]: Without dead ends: 76 [2022-01-09 23:20:27,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:20:27,536 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:27,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 73 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:20:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-09 23:20:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-01-09 23:20:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 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) [2022-01-09 23:20:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-01-09 23:20:27,544 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 56 [2022-01-09 23:20:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:27,545 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-01-09 23:20:27,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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) [2022-01-09 23:20:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-01-09 23:20:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-09 23:20:27,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:27,545 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:27,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:27,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 23:20:27,746 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -783512662, now seen corresponding path program 11 times [2022-01-09 23:20:27,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:27,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151860910] [2022-01-09 23:20:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:27,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:20:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:28,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151860910] [2022-01-09 23:20:28,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151860910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:20:28,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342348698] [2022-01-09 23:20:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:20:28,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:28,258 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:20:28,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:20:28,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-09 23:20:28,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-09 23:20:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:28,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-01-09 23:20:28,546 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-09 23:20:28,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-09 23:20:28,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-09 23:20:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:20:28,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:29,304 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_443 Int)) (<= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_443) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) c_~N~0)) is different from false