/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/eca-rers2012/Problem03_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:50:10,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:50:10,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:50:10,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:50:10,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:50:10,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:50:10,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:50:10,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:50:10,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:50:10,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:50:10,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:50:10,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:50:10,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:50:10,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:50:10,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:50:10,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:50:10,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:50:10,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:50:10,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:50:10,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:50:10,204 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 21:50:10,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:50:10,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:50:10,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:50:10,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:50:10,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:50:10,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:50:10,223 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:50:10,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:50:10,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:50:10,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:50:10,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:50:10,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:50:10,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:50:10,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:50:10,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:50:10,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:50:10,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:50:10,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:50:10,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:50:10,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:50:10,227 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:50:10,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:50:10,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:50:10,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:50:10,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:50:10,414 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:50:10,415 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:50:10,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label17.c [2022-01-10 21:50:10,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049194797/55724718f2d84f7a94275b946cd63253/FLAGc74d27e55 [2022-01-10 21:50:10,968 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:50:10,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label17.c [2022-01-10 21:50:11,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049194797/55724718f2d84f7a94275b946cd63253/FLAGc74d27e55 [2022-01-10 21:50:11,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049194797/55724718f2d84f7a94275b946cd63253 [2022-01-10 21:50:11,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:50:11,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:50:11,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:50:11,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:50:11,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:50:11,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:11,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69017173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11, skipping insertion in model container [2022-01-10 21:50:11,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:11,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:50:11,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:50:11,760 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label17.c[61094,61107] [2022-01-10 21:50:11,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:50:11,789 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:50:11,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label17.c[61094,61107] [2022-01-10 21:50:11,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:50:11,995 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:50:11,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11 WrapperNode [2022-01-10 21:50:11,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:50:11,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:50:11,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:50:11,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:50:12,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,104 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:50:12,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:50:12,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:50:12,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:50:12,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:50:12,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:50:12,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:50:12,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:50:12,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:50:12,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (1/1) ... [2022-01-10 21:50:12,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:50:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:50:12,256 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 21:50:12,282 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 21:50:12,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:50:12,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:50:12,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:50:12,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:50:12,372 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:50:12,373 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:50:14,027 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:50:14,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:50:14,035 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:50:14,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:14 BoogieIcfgContainer [2022-01-10 21:50:14,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:50:14,038 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:50:14,038 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:50:14,039 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:50:14,041 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:14" (1/1) ... [2022-01-10 21:50:14,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:50:14 BasicIcfg [2022-01-10 21:50:14,495 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:50:14,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:50:14,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:50:14,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:50:14,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:50:11" (1/4) ... [2022-01-10 21:50:14,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e67dab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:50:14, skipping insertion in model container [2022-01-10 21:50:14,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:11" (2/4) ... [2022-01-10 21:50:14,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e67dab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:50:14, skipping insertion in model container [2022-01-10 21:50:14,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:14" (3/4) ... [2022-01-10 21:50:14,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e67dab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:50:14, skipping insertion in model container [2022-01-10 21:50:14,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:50:14" (4/4) ... [2022-01-10 21:50:14,501 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label17.cTransformedIcfg [2022-01-10 21:50:14,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:50:14,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:50:14,540 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:50:14,544 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 21:50:14,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:50:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 21:50:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-10 21:50:14,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:14,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:14,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash -614292288, now seen corresponding path program 1 times [2022-01-10 21:50:14,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:14,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908212745] [2022-01-10 21:50:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:14,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:15,408 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 21:50:15,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:15,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908212745] [2022-01-10 21:50:15,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908212745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:15,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:15,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:15,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354388235] [2022-01-10 21:50:15,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:15,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:15,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:15,449 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 21:50:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:16,824 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2022-01-10 21:50:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 199 [2022-01-10 21:50:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:16,838 INFO L225 Difference]: With dead ends: 857 [2022-01-10 21:50:16,839 INFO L226 Difference]: Without dead ends: 462 [2022-01-10 21:50:16,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:16,845 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 89 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:16,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 186 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 21:50:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-10 21:50:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2022-01-10 21:50:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 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 21:50:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2022-01-10 21:50:16,902 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 199 [2022-01-10 21:50:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:16,903 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2022-01-10 21:50:16,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 21:50:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2022-01-10 21:50:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-10 21:50:16,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:16,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:16,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:50:16,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 428741980, now seen corresponding path program 1 times [2022-01-10 21:50:16,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:16,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104408157] [2022-01-10 21:50:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:16,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:17,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104408157] [2022-01-10 21:50:17,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104408157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:17,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:17,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:17,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907891753] [2022-01-10 21:50:17,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:17,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:17,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:17,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:17,071 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 21:50:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:18,134 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2022-01-10 21:50:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:18,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 207 [2022-01-10 21:50:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:18,139 INFO L225 Difference]: With dead ends: 1344 [2022-01-10 21:50:18,139 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 21:50:18,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:18,142 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:18,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 94 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 21:50:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2022-01-10 21:50:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 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 21:50:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2022-01-10 21:50:18,171 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 207 [2022-01-10 21:50:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2022-01-10 21:50:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 21:50:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2022-01-10 21:50:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 21:50:18,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:18,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:18,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:50:18,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1937739170, now seen corresponding path program 1 times [2022-01-10 21:50:18,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:18,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195954724] [2022-01-10 21:50:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:18,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:50:18,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195954724] [2022-01-10 21:50:18,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195954724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:18,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:18,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:18,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679214600] [2022-01-10 21:50:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:18,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:18,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:18,323 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 21:50:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:18,740 INFO L93 Difference]: Finished difference Result 2589 states and 3916 transitions. [2022-01-10 21:50:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 219 [2022-01-10 21:50:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:18,747 INFO L225 Difference]: With dead ends: 2589 [2022-01-10 21:50:18,747 INFO L226 Difference]: Without dead ends: 1721 [2022-01-10 21:50:18,748 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 21:50:18,749 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:18,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:50:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-10 21:50:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-01-10 21:50:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5110593713620488) internal successors, (2596), 1718 states have internal predecessors, (2596), 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 21:50:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2596 transitions. [2022-01-10 21:50:18,781 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2596 transitions. Word has length 219 [2022-01-10 21:50:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:18,781 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2596 transitions. [2022-01-10 21:50:18,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 21:50:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2596 transitions. [2022-01-10 21:50:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-10 21:50:18,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:18,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:50:18,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 449726884, now seen corresponding path program 1 times [2022-01-10 21:50:18,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:18,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707877618] [2022-01-10 21:50:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:18,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:50:18,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:18,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707877618] [2022-01-10 21:50:18,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707877618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:18,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:18,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:18,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158489686] [2022-01-10 21:50:18,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:18,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:18,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:18,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:18,923 INFO L87 Difference]: Start difference. First operand 1719 states and 2596 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 21:50:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:20,046 INFO L93 Difference]: Finished difference Result 5073 states and 7676 transitions. [2022-01-10 21:50:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:20,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 221 [2022-01-10 21:50:20,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:20,058 INFO L225 Difference]: With dead ends: 5073 [2022-01-10 21:50:20,058 INFO L226 Difference]: Without dead ends: 3356 [2022-01-10 21:50:20,061 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 21:50:20,062 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 259 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:20,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 401 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-01-10 21:50:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 3354. [2022-01-10 21:50:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 1.4085893229943334) internal successors, (4723), 3353 states have internal predecessors, (4723), 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 21:50:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4723 transitions. [2022-01-10 21:50:20,124 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4723 transitions. Word has length 221 [2022-01-10 21:50:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:20,125 INFO L470 AbstractCegarLoop]: Abstraction has 3354 states and 4723 transitions. [2022-01-10 21:50:20,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 21:50:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4723 transitions. [2022-01-10 21:50:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 21:50:20,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:20,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:20,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:50:20,133 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash -399655537, now seen corresponding path program 1 times [2022-01-10 21:50:20,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693452121] [2022-01-10 21:50:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:20,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:20,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:20,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693452121] [2022-01-10 21:50:20,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693452121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:20,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:20,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:20,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577264819] [2022-01-10 21:50:20,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:20,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:20,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:20,258 INFO L87 Difference]: Start difference. First operand 3354 states and 4723 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 21:50:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:21,310 INFO L93 Difference]: Finished difference Result 6708 states and 9448 transitions. [2022-01-10 21:50:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:21,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 225 [2022-01-10 21:50:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:21,321 INFO L225 Difference]: With dead ends: 6708 [2022-01-10 21:50:21,321 INFO L226 Difference]: Without dead ends: 3356 [2022-01-10 21:50:21,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:21,326 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 238 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:21,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 141 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2022-01-10 21:50:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 3354. [2022-01-10 21:50:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 1.329555621831196) internal successors, (4458), 3353 states have internal predecessors, (4458), 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 21:50:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 4458 transitions. [2022-01-10 21:50:21,386 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 4458 transitions. Word has length 225 [2022-01-10 21:50:21,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:21,386 INFO L470 AbstractCegarLoop]: Abstraction has 3354 states and 4458 transitions. [2022-01-10 21:50:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 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 21:50:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 4458 transitions. [2022-01-10 21:50:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-10 21:50:21,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:21,394 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:21,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:50:21,394 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:21,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2070500650, now seen corresponding path program 1 times [2022-01-10 21:50:21,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:21,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454389872] [2022-01-10 21:50:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:21,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 21:50:21,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454389872] [2022-01-10 21:50:21,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454389872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:21,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:21,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:21,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232845753] [2022-01-10 21:50:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:21,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:21,526 INFO L87 Difference]: Start difference. First operand 3354 states and 4458 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 21:50:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:22,669 INFO L93 Difference]: Finished difference Result 8354 states and 11074 transitions. [2022-01-10 21:50:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 227 [2022-01-10 21:50:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:22,686 INFO L225 Difference]: With dead ends: 8354 [2022-01-10 21:50:22,686 INFO L226 Difference]: Without dead ends: 5002 [2022-01-10 21:50:22,690 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 21:50:22,691 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:22,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 413 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2022-01-10 21:50:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 4994. [2022-01-10 21:50:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4994 states, 4993 states have (on average 1.284197877027839) internal successors, (6412), 4993 states have internal predecessors, (6412), 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 21:50:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 6412 transitions. [2022-01-10 21:50:22,790 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 6412 transitions. Word has length 227 [2022-01-10 21:50:22,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:22,790 INFO L470 AbstractCegarLoop]: Abstraction has 4994 states and 6412 transitions. [2022-01-10 21:50:22,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 21:50:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 6412 transitions. [2022-01-10 21:50:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-10 21:50:22,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:22,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:22,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:50:22,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1116147449, now seen corresponding path program 1 times [2022-01-10 21:50:22,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:22,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337372465] [2022-01-10 21:50:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:22,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 21:50:22,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:22,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337372465] [2022-01-10 21:50:22,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337372465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:22,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:22,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:22,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173802682] [2022-01-10 21:50:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:22,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:22,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:22,997 INFO L87 Difference]: Start difference. First operand 4994 states and 6412 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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 21:50:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:24,045 INFO L93 Difference]: Finished difference Result 11654 states and 14909 transitions. [2022-01-10 21:50:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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 234 [2022-01-10 21:50:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:24,066 INFO L225 Difference]: With dead ends: 11654 [2022-01-10 21:50:24,066 INFO L226 Difference]: Without dead ends: 6662 [2022-01-10 21:50:24,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:24,075 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:24,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 137 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2022-01-10 21:50:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 6658. [2022-01-10 21:50:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6658 states, 6657 states have (on average 1.2745981673426467) internal successors, (8485), 6657 states have internal predecessors, (8485), 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 21:50:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 8485 transitions. [2022-01-10 21:50:24,221 INFO L78 Accepts]: Start accepts. Automaton has 6658 states and 8485 transitions. Word has length 234 [2022-01-10 21:50:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:24,221 INFO L470 AbstractCegarLoop]: Abstraction has 6658 states and 8485 transitions. [2022-01-10 21:50:24,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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 21:50:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6658 states and 8485 transitions. [2022-01-10 21:50:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-10 21:50:24,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:24,235 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:24,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:50:24,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:24,237 INFO L85 PathProgramCache]: Analyzing trace with hash 968849775, now seen corresponding path program 2 times [2022-01-10 21:50:24,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:24,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661603621] [2022-01-10 21:50:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:24,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 21:50:24,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:24,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661603621] [2022-01-10 21:50:24,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661603621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:24,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:24,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:24,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644996397] [2022-01-10 21:50:24,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:24,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:24,394 INFO L87 Difference]: Start difference. First operand 6658 states and 8485 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 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 21:50:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:25,551 INFO L93 Difference]: Finished difference Result 15355 states and 19591 transitions. [2022-01-10 21:50:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 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 241 [2022-01-10 21:50:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:25,576 INFO L225 Difference]: With dead ends: 15355 [2022-01-10 21:50:25,576 INFO L226 Difference]: Without dead ends: 8699 [2022-01-10 21:50:25,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:50:25,585 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 806 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:25,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 391 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2022-01-10 21:50:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 8693. [2022-01-10 21:50:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8693 states, 8692 states have (on average 1.2764611136677404) internal successors, (11095), 8692 states have internal predecessors, (11095), 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 21:50:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 11095 transitions. [2022-01-10 21:50:25,757 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 11095 transitions. Word has length 241 [2022-01-10 21:50:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:25,759 INFO L470 AbstractCegarLoop]: Abstraction has 8693 states and 11095 transitions. [2022-01-10 21:50:25,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 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 21:50:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 11095 transitions. [2022-01-10 21:50:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-10 21:50:25,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:25,774 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:50:25,774 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:25,774 INFO L85 PathProgramCache]: Analyzing trace with hash -55902036, now seen corresponding path program 1 times [2022-01-10 21:50:25,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250456593] [2022-01-10 21:50:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:25,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 21:50:25,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:25,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250456593] [2022-01-10 21:50:25,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250456593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:25,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:25,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:25,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162399262] [2022-01-10 21:50:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:25,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:25,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:25,942 INFO L87 Difference]: Start difference. First operand 8693 states and 11095 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 21:50:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:27,473 INFO L93 Difference]: Finished difference Result 20070 states and 25722 transitions. [2022-01-10 21:50:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 243 [2022-01-10 21:50:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:27,509 INFO L225 Difference]: With dead ends: 20070 [2022-01-10 21:50:27,509 INFO L226 Difference]: Without dead ends: 11379 [2022-01-10 21:50:27,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:50:27,518 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 449 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:27,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 157 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 21:50:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11379 states. [2022-01-10 21:50:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11379 to 8687. [2022-01-10 21:50:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 1.2763067004374855) internal successors, (11086), 8686 states have internal predecessors, (11086), 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 21:50:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 11086 transitions. [2022-01-10 21:50:27,629 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 11086 transitions. Word has length 243 [2022-01-10 21:50:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 8687 states and 11086 transitions. [2022-01-10 21:50:27,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 3 states have internal predecessors, (237), 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 21:50:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 11086 transitions. [2022-01-10 21:50:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-10 21:50:27,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:27,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:27,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:50:27,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1041112350, now seen corresponding path program 1 times [2022-01-10 21:50:27,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:27,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488242515] [2022-01-10 21:50:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:27,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 21:50:27,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:27,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488242515] [2022-01-10 21:50:27,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488242515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:27,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:27,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:27,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928964517] [2022-01-10 21:50:27,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:27,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:27,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:27,793 INFO L87 Difference]: Start difference. First operand 8687 states and 11086 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 21:50:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:28,669 INFO L93 Difference]: Finished difference Result 17372 states and 22170 transitions. [2022-01-10 21:50:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 248 [2022-01-10 21:50:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:28,724 INFO L225 Difference]: With dead ends: 17372 [2022-01-10 21:50:28,725 INFO L226 Difference]: Without dead ends: 8687 [2022-01-10 21:50:28,734 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 21:50:28,735 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 251 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:28,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 378 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8687 states. [2022-01-10 21:50:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8687 to 8681. [2022-01-10 21:50:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8681 states, 8680 states have (on average 1.2328341013824884) internal successors, (10701), 8680 states have internal predecessors, (10701), 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 21:50:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8681 states to 8681 states and 10701 transitions. [2022-01-10 21:50:28,847 INFO L78 Accepts]: Start accepts. Automaton has 8681 states and 10701 transitions. Word has length 248 [2022-01-10 21:50:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:28,847 INFO L470 AbstractCegarLoop]: Abstraction has 8681 states and 10701 transitions. [2022-01-10 21:50:28,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 21:50:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8681 states and 10701 transitions. [2022-01-10 21:50:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-10 21:50:28,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:28,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:28,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:50:28,863 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -541272583, now seen corresponding path program 1 times [2022-01-10 21:50:28,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:28,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757556172] [2022-01-10 21:50:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:28,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 21:50:29,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757556172] [2022-01-10 21:50:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757556172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:29,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:29,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:29,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742462014] [2022-01-10 21:50:29,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:29,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:29,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:29,017 INFO L87 Difference]: Start difference. First operand 8681 states and 10701 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 21:50:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:30,022 INFO L93 Difference]: Finished difference Result 25367 states and 31253 transitions. [2022-01-10 21:50:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 253 [2022-01-10 21:50:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:30,049 INFO L225 Difference]: With dead ends: 25367 [2022-01-10 21:50:30,050 INFO L226 Difference]: Without dead ends: 16688 [2022-01-10 21:50:30,063 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 21:50:30,064 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 243 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:30,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 425 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2022-01-10 21:50:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 16677. [2022-01-10 21:50:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16677 states, 16676 states have (on average 1.2133605181098586) internal successors, (20234), 16676 states have internal predecessors, (20234), 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 21:50:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16677 states to 16677 states and 20234 transitions. [2022-01-10 21:50:30,331 INFO L78 Accepts]: Start accepts. Automaton has 16677 states and 20234 transitions. Word has length 253 [2022-01-10 21:50:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:30,331 INFO L470 AbstractCegarLoop]: Abstraction has 16677 states and 20234 transitions. [2022-01-10 21:50:30,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 21:50:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16677 states and 20234 transitions. [2022-01-10 21:50:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-10 21:50:30,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:30,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:30,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:50:30,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1059650507, now seen corresponding path program 1 times [2022-01-10 21:50:30,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:30,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864015586] [2022-01-10 21:50:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:30,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 21:50:30,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:30,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864015586] [2022-01-10 21:50:30,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864015586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:30,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:30,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:30,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650699608] [2022-01-10 21:50:30,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:30,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:30,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:30,607 INFO L87 Difference]: Start difference. First operand 16677 states and 20234 transitions. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 21:50:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:32,015 INFO L93 Difference]: Finished difference Result 57369 states and 69719 transitions. [2022-01-10 21:50:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 255 [2022-01-10 21:50:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:32,065 INFO L225 Difference]: With dead ends: 57369 [2022-01-10 21:50:32,066 INFO L226 Difference]: Without dead ends: 40694 [2022-01-10 21:50:32,090 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 21:50:32,091 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 508 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:32,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 624 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:50:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40694 states. [2022-01-10 21:50:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40694 to 30219. [2022-01-10 21:50:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30219 states, 30218 states have (on average 1.2143424449003906) internal successors, (36695), 30218 states have internal predecessors, (36695), 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 21:50:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30219 states to 30219 states and 36695 transitions. [2022-01-10 21:50:32,683 INFO L78 Accepts]: Start accepts. Automaton has 30219 states and 36695 transitions. Word has length 255 [2022-01-10 21:50:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:32,683 INFO L470 AbstractCegarLoop]: Abstraction has 30219 states and 36695 transitions. [2022-01-10 21:50:32,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.5) internal successors, (230), 3 states have internal predecessors, (230), 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 21:50:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 30219 states and 36695 transitions. [2022-01-10 21:50:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 21:50:32,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:32,803 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:32,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:50:32,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:32,804 INFO L85 PathProgramCache]: Analyzing trace with hash 319062594, now seen corresponding path program 1 times [2022-01-10 21:50:32,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:32,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195510236] [2022-01-10 21:50:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:32,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 21:50:32,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195510236] [2022-01-10 21:50:32,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195510236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:32,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:32,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728147243] [2022-01-10 21:50:32,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:32,978 INFO L87 Difference]: Start difference. First operand 30219 states and 36695 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 21:50:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:34,470 INFO L93 Difference]: Finished difference Result 91428 states and 111235 transitions. [2022-01-10 21:50:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 269 [2022-01-10 21:50:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:34,547 INFO L225 Difference]: With dead ends: 91428 [2022-01-10 21:50:34,547 INFO L226 Difference]: Without dead ends: 61211 [2022-01-10 21:50:34,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:50:34,579 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 577 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:34,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 547 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:50:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61211 states. [2022-01-10 21:50:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61211 to 61094. [2022-01-10 21:50:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61094 states, 61093 states have (on average 1.212561177221613) internal successors, (74079), 61093 states have internal predecessors, (74079), 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 21:50:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61094 states to 61094 states and 74079 transitions. [2022-01-10 21:50:35,699 INFO L78 Accepts]: Start accepts. Automaton has 61094 states and 74079 transitions. Word has length 269 [2022-01-10 21:50:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:35,699 INFO L470 AbstractCegarLoop]: Abstraction has 61094 states and 74079 transitions. [2022-01-10 21:50:35,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 21:50:35,699 INFO L276 IsEmpty]: Start isEmpty. Operand 61094 states and 74079 transitions. [2022-01-10 21:50:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 21:50:35,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:35,733 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:35,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:50:35,733 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1445911502, now seen corresponding path program 1 times [2022-01-10 21:50:35,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:35,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547644214] [2022-01-10 21:50:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:35,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 21:50:35,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547644214] [2022-01-10 21:50:35,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547644214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:35,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:35,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298539775] [2022-01-10 21:50:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:35,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:35,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:35,930 INFO L87 Difference]: Start difference. First operand 61094 states and 74079 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 2 states have internal predecessors, (244), 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 21:50:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:37,440 INFO L93 Difference]: Finished difference Result 160159 states and 194203 transitions. [2022-01-10 21:50:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 2 states have internal predecessors, (244), 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 269 [2022-01-10 21:50:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:37,690 INFO L225 Difference]: With dead ends: 160159 [2022-01-10 21:50:37,690 INFO L226 Difference]: Without dead ends: 99067 [2022-01-10 21:50:37,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:37,729 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 200 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:37,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 173 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99067 states. [2022-01-10 21:50:39,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99067 to 99043. [2022-01-10 21:50:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99043 states, 99042 states have (on average 1.1481492700066638) internal successors, (113715), 99042 states have internal predecessors, (113715), 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 21:50:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99043 states to 99043 states and 113715 transitions. [2022-01-10 21:50:39,361 INFO L78 Accepts]: Start accepts. Automaton has 99043 states and 113715 transitions. Word has length 269 [2022-01-10 21:50:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:39,362 INFO L470 AbstractCegarLoop]: Abstraction has 99043 states and 113715 transitions. [2022-01-10 21:50:39,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 2 states have internal predecessors, (244), 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 21:50:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 99043 states and 113715 transitions. [2022-01-10 21:50:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-10 21:50:39,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:39,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:39,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:50:39,401 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1221295560, now seen corresponding path program 1 times [2022-01-10 21:50:39,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:39,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599350736] [2022-01-10 21:50:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:39,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:39,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:39,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599350736] [2022-01-10 21:50:39,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599350736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:39,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:39,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:39,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093540335] [2022-01-10 21:50:39,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:39,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:40,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:40,014 INFO L87 Difference]: Start difference. First operand 99043 states and 113715 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 21:50:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:41,908 INFO L93 Difference]: Finished difference Result 223777 states and 255526 transitions. [2022-01-10 21:50:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:41,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 273 [2022-01-10 21:50:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:42,121 INFO L225 Difference]: With dead ends: 223777 [2022-01-10 21:50:42,121 INFO L226 Difference]: Without dead ends: 123696 [2022-01-10 21:50:42,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:50:42,202 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 140 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:42,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 218 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:50:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123696 states. [2022-01-10 21:50:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123696 to 123584. [2022-01-10 21:50:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123584 states, 123583 states have (on average 1.1274932636365844) internal successors, (139339), 123583 states have internal predecessors, (139339), 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 21:50:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123584 states to 123584 states and 139339 transitions. [2022-01-10 21:50:44,253 INFO L78 Accepts]: Start accepts. Automaton has 123584 states and 139339 transitions. Word has length 273 [2022-01-10 21:50:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 123584 states and 139339 transitions. [2022-01-10 21:50:44,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 21:50:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 123584 states and 139339 transitions. [2022-01-10 21:50:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-10 21:50:44,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:44,317 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:44,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:50:44,317 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1377382356, now seen corresponding path program 1 times [2022-01-10 21:50:44,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:44,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234663937] [2022-01-10 21:50:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:44,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 21:50:44,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:44,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234663937] [2022-01-10 21:50:44,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234663937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:44,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:44,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:44,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694151318] [2022-01-10 21:50:44,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:44,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:44,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:44,532 INFO L87 Difference]: Start difference. First operand 123584 states and 139339 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 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 21:50:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:46,289 INFO L93 Difference]: Finished difference Result 306256 states and 346145 transitions. [2022-01-10 21:50:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 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 306 [2022-01-10 21:50:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:46,533 INFO L225 Difference]: With dead ends: 306256 [2022-01-10 21:50:46,533 INFO L226 Difference]: Without dead ends: 182674 [2022-01-10 21:50:46,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:46,611 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 168 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:46,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 231 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182674 states. [2022-01-10 21:50:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182674 to 149779. [2022-01-10 21:50:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149779 states, 149778 states have (on average 1.1300124183792013) internal successors, (169251), 149778 states have internal predecessors, (169251), 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 21:50:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149779 states to 149779 states and 169251 transitions. [2022-01-10 21:50:49,093 INFO L78 Accepts]: Start accepts. Automaton has 149779 states and 169251 transitions. Word has length 306 [2022-01-10 21:50:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:49,093 INFO L470 AbstractCegarLoop]: Abstraction has 149779 states and 169251 transitions. [2022-01-10 21:50:49,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 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 21:50:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 149779 states and 169251 transitions. [2022-01-10 21:50:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-10 21:50:49,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:49,162 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:49,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 21:50:49,162 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:49,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1628822040, now seen corresponding path program 1 times [2022-01-10 21:50:49,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:49,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543483330] [2022-01-10 21:50:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:49,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-10 21:50:49,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543483330] [2022-01-10 21:50:49,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543483330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:49,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:49,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:49,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972573555] [2022-01-10 21:50:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:49,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:49,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:49,315 INFO L87 Difference]: Start difference. First operand 149779 states and 169251 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 21:50:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:51,366 INFO L93 Difference]: Finished difference Result 288684 states and 326122 transitions. [2022-01-10 21:50:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 329 [2022-01-10 21:50:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:51,550 INFO L225 Difference]: With dead ends: 288684 [2022-01-10 21:50:51,550 INFO L226 Difference]: Without dead ends: 138907 [2022-01-10 21:50:51,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:50:51,613 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 496 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:51,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 62 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138907 states. [2022-01-10 21:50:53,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138907 to 116161. [2022-01-10 21:50:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116161 states, 116160 states have (on average 1.1079717630853994) internal successors, (128702), 116160 states have internal predecessors, (128702), 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 21:50:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116161 states to 116161 states and 128702 transitions. [2022-01-10 21:50:53,428 INFO L78 Accepts]: Start accepts. Automaton has 116161 states and 128702 transitions. Word has length 329 [2022-01-10 21:50:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:53,429 INFO L470 AbstractCegarLoop]: Abstraction has 116161 states and 128702 transitions. [2022-01-10 21:50:53,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 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 21:50:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 116161 states and 128702 transitions. [2022-01-10 21:50:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-10 21:50:53,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:53,735 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:53,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:50:53,736 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1190128136, now seen corresponding path program 1 times [2022-01-10 21:50:53,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:53,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079160653] [2022-01-10 21:50:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:53,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 21:50:54,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:54,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079160653] [2022-01-10 21:50:54,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079160653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:54,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:54,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:50:54,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858359810] [2022-01-10 21:50:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:54,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:54,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:54,098 INFO L87 Difference]: Start difference. First operand 116161 states and 128702 transitions. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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 21:50:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:55,959 INFO L93 Difference]: Finished difference Result 233173 states and 258566 transitions. [2022-01-10 21:50:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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 378 [2022-01-10 21:50:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:56,352 INFO L225 Difference]: With dead ends: 233173 [2022-01-10 21:50:56,352 INFO L226 Difference]: Without dead ends: 117014 [2022-01-10 21:50:56,421 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 21:50:56,422 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 293 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:56,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 343 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 21:50:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117014 states. [2022-01-10 21:50:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117014 to 115146. [2022-01-10 21:50:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115146 states, 115145 states have (on average 1.0966781015241651) internal successors, (126277), 115145 states have internal predecessors, (126277), 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 21:50:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115146 states to 115146 states and 126277 transitions. [2022-01-10 21:50:57,861 INFO L78 Accepts]: Start accepts. Automaton has 115146 states and 126277 transitions. Word has length 378 [2022-01-10 21:50:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:57,861 INFO L470 AbstractCegarLoop]: Abstraction has 115146 states and 126277 transitions. [2022-01-10 21:50:57,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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 21:50:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 115146 states and 126277 transitions. [2022-01-10 21:50:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-10 21:50:57,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:57,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:50:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 21:50:57,897 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1717171426, now seen corresponding path program 1 times [2022-01-10 21:50:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:57,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932936418] [2022-01-10 21:50:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:57,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-01-10 21:50:58,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:58,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932936418] [2022-01-10 21:50:58,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932936418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:58,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:58,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:58,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339056459] [2022-01-10 21:50:58,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:58,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:58,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:58,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:58,466 INFO L87 Difference]: Start difference. First operand 115146 states and 126277 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 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 21:50:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:59,989 INFO L93 Difference]: Finished difference Result 255334 states and 280711 transitions. [2022-01-10 21:50:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 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 378 [2022-01-10 21:50:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:00,154 INFO L225 Difference]: With dead ends: 255334 [2022-01-10 21:51:00,155 INFO L226 Difference]: Without dead ends: 140190 [2022-01-10 21:51:00,219 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 21:51:00,220 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 201 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:00,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 168 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:51:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140190 states. [2022-01-10 21:51:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140190 to 139316. [2022-01-10 21:51:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139316 states, 139315 states have (on average 1.0960413451530704) internal successors, (152695), 139315 states have internal predecessors, (152695), 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 21:51:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139316 states to 139316 states and 152695 transitions. [2022-01-10 21:51:02,142 INFO L78 Accepts]: Start accepts. Automaton has 139316 states and 152695 transitions. Word has length 378 [2022-01-10 21:51:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:02,142 INFO L470 AbstractCegarLoop]: Abstraction has 139316 states and 152695 transitions. [2022-01-10 21:51:02,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 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 21:51:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 139316 states and 152695 transitions. [2022-01-10 21:51:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-10 21:51:02,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:02,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:02,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 21:51:02,176 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:02,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1310926574, now seen corresponding path program 1 times [2022-01-10 21:51:02,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:02,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232433881] [2022-01-10 21:51:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:02,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 21:51:02,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232433881] [2022-01-10 21:51:02,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232433881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:02,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:02,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:02,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220097402] [2022-01-10 21:51:02,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:02,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:02,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:02,731 INFO L87 Difference]: Start difference. First operand 139316 states and 152695 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)