/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 23:18:18,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 23:18:18,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 23:18:18,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 23:18:18,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 23:18:18,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 23:18:18,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 23:18:18,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 23:18:18,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 23:18:18,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 23:18:18,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 23:18:18,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 23:18:18,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 23:18:18,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 23:18:18,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 23:18:18,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 23:18:18,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 23:18:18,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 23:18:18,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 23:18:18,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 23:18:18,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 23:18:18,273 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 23:18:18,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 23:18:18,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 23:18:18,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 23:18:18,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 23:18:18,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 23:18:18,275 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 23:18:18,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 23:18:18,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 23:18:18,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 23:18:18,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 23:18:18,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 23:18:18,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 23:18:18,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 23:18:18,276 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 23:18:18,276 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 23:18:18,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 23:18:18,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 23:18:18,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 23:18:18,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 23:18:18,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 23:18:18,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:18:18,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 23:18:18,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 23:18:18,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 23:18:18,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 23:18:18,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 23:18:18,279 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 23:18:18,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 23:18:18,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 23:18:18,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 23:18:18,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 23:18:18,280 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 23:18:18,280 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 23:18:18,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 23:18:18,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 23:18:18,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 23:18:18,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 23:18:18,534 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 23:18:18,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-3.c [2022-01-10 23:18:18,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afc0631c/20f2081af3124ddebb67114d8542e680/FLAG3e73c2d6a [2022-01-10 23:18:19,018 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 23:18:19,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-3.c [2022-01-10 23:18:19,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afc0631c/20f2081af3124ddebb67114d8542e680/FLAG3e73c2d6a [2022-01-10 23:18:19,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5afc0631c/20f2081af3124ddebb67114d8542e680 [2022-01-10 23:18:19,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 23:18:19,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 23:18:19,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 23:18:19,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 23:18:19,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 23:18:19,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:19,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5652d6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19, skipping insertion in model container [2022-01-10 23:18:19,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:19,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 23:18:19,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 23:18:19,805 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-3.c[24720,24733] [2022-01-10 23:18:19,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:18:19,835 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 23:18:19,920 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-3.c[24720,24733] [2022-01-10 23:18:19,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:18:19,942 INFO L208 MainTranslator]: Completed translation [2022-01-10 23:18:19,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19 WrapperNode [2022-01-10 23:18:19,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 23:18:19,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 23:18:19,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 23:18:19,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 23:18:19,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:19,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,004 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 375 [2022-01-10 23:18:20,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 23:18:20,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 23:18:20,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 23:18:20,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 23:18:20,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 23:18:20,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 23:18:20,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 23:18:20,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 23:18:20,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (1/1) ... [2022-01-10 23:18:20,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:18:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:18:20,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 23:18:20,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 23:18:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 23:18:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 23:18:20,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 23:18:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 23:18:20,290 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 23:18:20,291 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 23:18:20,742 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 23:18:20,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 23:18:20,751 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 23:18:20,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:18:20 BoogieIcfgContainer [2022-01-10 23:18:20,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 23:18:20,754 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 23:18:20,754 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 23:18:20,755 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 23:18:20,757 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:18:20" (1/1) ... [2022-01-10 23:18:20,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:18:20 BasicIcfg [2022-01-10 23:18:20,958 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 23:18:20,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 23:18:20,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 23:18:20,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 23:18:20,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:18:19" (1/4) ... [2022-01-10 23:18:20,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbd66ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:18:20, skipping insertion in model container [2022-01-10 23:18:20,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:18:19" (2/4) ... [2022-01-10 23:18:20,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbd66ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:18:20, skipping insertion in model container [2022-01-10 23:18:20,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:18:20" (3/4) ... [2022-01-10 23:18:20,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbd66ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:18:20, skipping insertion in model container [2022-01-10 23:18:20,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:18:20" (4/4) ... [2022-01-10 23:18:20,968 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.cTransformedIcfg [2022-01-10 23:18:20,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 23:18:20,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 23:18:21,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 23:18:21,029 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 23:18:21,029 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 23:18:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 23:18:21,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:21,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:21,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1769879515, now seen corresponding path program 1 times [2022-01-10 23:18:21,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141611573] [2022-01-10 23:18:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:21,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:21,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:21,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141611573] [2022-01-10 23:18:21,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141611573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:18:21,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:18:21,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 23:18:21,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368829349] [2022-01-10 23:18:21,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:18:21,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 23:18:21,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:18:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 23:18:21,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 23:18:21,314 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:18:21,342 INFO L93 Difference]: Finished difference Result 216 states and 416 transitions. [2022-01-10 23:18:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 23:18:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-10 23:18:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:18:21,352 INFO L225 Difference]: With dead ends: 216 [2022-01-10 23:18:21,352 INFO L226 Difference]: Without dead ends: 95 [2022-01-10 23:18:21,355 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 [2022-01-10 23:18:21,357 INFO L933 BasicCegarLoop]: 194 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, 194 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:18:21,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:18:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-10 23:18:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-01-10 23:18:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.648936170212766) internal successors, (155), 94 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 155 transitions. [2022-01-10 23:18:21,389 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 155 transitions. Word has length 9 [2022-01-10 23:18:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:18:21,390 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 155 transitions. [2022-01-10 23:18:21,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 155 transitions. [2022-01-10 23:18:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 23:18:21,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:21,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:21,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 23:18:21,392 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash -937771571, now seen corresponding path program 1 times [2022-01-10 23:18:21,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:21,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828101801] [2022-01-10 23:18:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:21,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:21,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:21,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828101801] [2022-01-10 23:18:21,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828101801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:18:21,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:18:21,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 23:18:21,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571150038] [2022-01-10 23:18:21,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:18:21,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 23:18:21,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:18:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 23:18:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:18:21,449 INFO L87 Difference]: Start difference. First operand 95 states and 155 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:18:21,515 INFO L93 Difference]: Finished difference Result 191 states and 312 transitions. [2022-01-10 23:18:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 23:18:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-01-10 23:18:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:18:21,517 INFO L225 Difference]: With dead ends: 191 [2022-01-10 23:18:21,517 INFO L226 Difference]: Without dead ends: 98 [2022-01-10 23:18:21,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:18:21,519 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 4 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:18:21,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 288 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:18:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-10 23:18:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-01-10 23:18:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.6288659793814433) internal successors, (158), 97 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 158 transitions. [2022-01-10 23:18:21,528 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 158 transitions. Word has length 10 [2022-01-10 23:18:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:18:21,528 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 158 transitions. [2022-01-10 23:18:21,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 158 transitions. [2022-01-10 23:18:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 23:18:21,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:21,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:21,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 23:18:21,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash 972527464, now seen corresponding path program 1 times [2022-01-10 23:18:21,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:21,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601598662] [2022-01-10 23:18:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:21,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:21,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601598662] [2022-01-10 23:18:21,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601598662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:18:21,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:18:21,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 23:18:21,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738603230] [2022-01-10 23:18:21,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:18:21,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 23:18:21,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:18:21,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 23:18:21,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 23:18:21,970 INFO L87 Difference]: Start difference. First operand 98 states and 158 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:18:22,222 INFO L93 Difference]: Finished difference Result 197 states and 315 transitions. [2022-01-10 23:18:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 23:18:22,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2022-01-10 23:18:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:18:22,225 INFO L225 Difference]: With dead ends: 197 [2022-01-10 23:18:22,225 INFO L226 Difference]: Without dead ends: 183 [2022-01-10 23:18:22,225 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 [2022-01-10 23:18:22,226 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 123 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:18:22,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 364 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:18:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-10 23:18:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2022-01-10 23:18:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6325301204819278) internal successors, (271), 166 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 271 transitions. [2022-01-10 23:18:22,250 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 271 transitions. Word has length 15 [2022-01-10 23:18:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:18:22,250 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 271 transitions. [2022-01-10 23:18:22,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 271 transitions. [2022-01-10 23:18:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 23:18:22,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:22,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:22,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 23:18:22,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 114182670, now seen corresponding path program 1 times [2022-01-10 23:18:22,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265063004] [2022-01-10 23:18:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:22,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:22,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:22,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265063004] [2022-01-10 23:18:22,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265063004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:18:22,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:18:22,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 23:18:22,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342101257] [2022-01-10 23:18:22,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:18:22,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 23:18:22,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:18:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 23:18:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:18:22,327 INFO L87 Difference]: Start difference. First operand 167 states and 271 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:18:22,355 INFO L93 Difference]: Finished difference Result 283 states and 457 transitions. [2022-01-10 23:18:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 23:18:22,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 23:18:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:18:22,360 INFO L225 Difference]: With dead ends: 283 [2022-01-10 23:18:22,360 INFO L226 Difference]: Without dead ends: 119 [2022-01-10 23:18:22,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:18:22,370 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 28 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:18:22,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 265 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:18:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-10 23:18:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-01-10 23:18:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.5862068965517242) internal successors, (184), 116 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 184 transitions. [2022-01-10 23:18:22,379 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 184 transitions. Word has length 16 [2022-01-10 23:18:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:18:22,379 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 184 transitions. [2022-01-10 23:18:22,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 184 transitions. [2022-01-10 23:18:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 23:18:22,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:22,381 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:22,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 23:18:22,381 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1636017867, now seen corresponding path program 1 times [2022-01-10 23:18:22,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:22,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487795308] [2022-01-10 23:18:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:22,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 23:18:22,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:22,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487795308] [2022-01-10 23:18:22,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487795308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:18:22,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:18:22,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 23:18:22,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982317165] [2022-01-10 23:18:22,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:18:22,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 23:18:22,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:18:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 23:18:22,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:18:22,425 INFO L87 Difference]: Start difference. First operand 117 states and 184 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:18:22,446 INFO L93 Difference]: Finished difference Result 217 states and 340 transitions. [2022-01-10 23:18:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 23:18:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 23:18:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:18:22,447 INFO L225 Difference]: With dead ends: 217 [2022-01-10 23:18:22,447 INFO L226 Difference]: Without dead ends: 103 [2022-01-10 23:18:22,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:18:22,448 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 88 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:18:22,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 155 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:18:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-10 23:18:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-01-10 23:18:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.55) internal successors, (155), 100 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 155 transitions. [2022-01-10 23:18:22,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 155 transitions. Word has length 21 [2022-01-10 23:18:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:18:22,455 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 155 transitions. [2022-01-10 23:18:22,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 155 transitions. [2022-01-10 23:18:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 23:18:22,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:22,456 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:22,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 23:18:22,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 724136411, now seen corresponding path program 1 times [2022-01-10 23:18:22,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:22,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545371979] [2022-01-10 23:18:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:22,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:22,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545371979] [2022-01-10 23:18:22,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545371979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:18:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142744789] [2022-01-10 23:18:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:22,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:18:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:18:22,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 23:18:22,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 23:18:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 23:18:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:18:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:23,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:18:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142744789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:18:23,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:18:23,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 23:18:23,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67661352] [2022-01-10 23:18:23,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:18:23,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 23:18:23,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:18:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 23:18:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 23:18:23,118 INFO L87 Difference]: Start difference. First operand 101 states and 155 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:18:23,138 INFO L93 Difference]: Finished difference Result 161 states and 249 transitions. [2022-01-10 23:18:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 23:18:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 23:18:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:18:23,140 INFO L225 Difference]: With dead ends: 161 [2022-01-10 23:18:23,140 INFO L226 Difference]: Without dead ends: 158 [2022-01-10 23:18:23,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 23:18:23,146 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 106 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:18:23,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 442 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-01-10 23:18:23,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-10 23:18:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2022-01-10 23:18:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.6041666666666667) internal successors, (231), 144 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 231 transitions. [2022-01-10 23:18:23,161 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 231 transitions. Word has length 23 [2022-01-10 23:18:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:18:23,161 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 231 transitions. [2022-01-10 23:18:23,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:18:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 231 transitions. [2022-01-10 23:18:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 23:18:23,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:18:23,163 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:18:23,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 23:18:23,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-10 23:18:23,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:18:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:18:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash 974380071, now seen corresponding path program 1 times [2022-01-10 23:18:23,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:18:23,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611640646] [2022-01-10 23:18:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:23,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:18:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:18:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:18:23,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:18:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611640646] [2022-01-10 23:18:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611640646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:18:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855860344] [2022-01-10 23:18:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:18:23,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:18:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:18:23,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 23:18:23,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process