/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:30:33,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:30:33,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:30:33,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:30:33,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:30:33,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:30:33,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:30:33,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:30:33,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:30:33,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:30:33,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:30:33,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:30:33,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:30:33,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:30:33,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:30:33,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:30:33,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:30:33,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:30:34,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:30:34,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:30:34,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:30:34,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:30:34,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:30:34,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:30:34,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-09 23:30:34,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-09 23:30:34,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-09 23:30:34,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-09 23:30:34,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-09 23:30:34,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-09 23:30:34,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-09 23:30:34,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-09 23:30:34,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-09 23:30:34,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-09 23:30:34,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-09 23:30:34,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-09 23:30:34,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-09 23:30:34,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-09 23:30:34,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:30:34,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:30:34,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:30:34,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:30:34,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:30:34,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:30:34,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:30:34,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:30:34,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:30:34,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:30:34,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:30:34,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:30:34,048 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:30:34,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:30:34,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:30:34,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:30:34,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:30:34,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:30:34,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:30:34,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:30:34,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:30:34,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:30:34,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:30:34,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:30:34,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:30:34,051 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:30:34,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:30:34,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:30:34,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:30:34,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:30:34,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:30:34,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:30:34,265 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:30:34,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label23.c [2022-01-09 23:30:34,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed387c130/6a3e88b5a7e24744a77530bc924ac412/FLAG7339659f8 [2022-01-09 23:30:34,816 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:30:34,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label23.c [2022-01-09 23:30:34,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed387c130/6a3e88b5a7e24744a77530bc924ac412/FLAG7339659f8 [2022-01-09 23:30:35,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed387c130/6a3e88b5a7e24744a77530bc924ac412 [2022-01-09 23:30:35,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:30:35,309 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:30:35,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:30:35,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:30:35,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:30:35,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:30:35" (1/1) ... [2022-01-09 23:30:35,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3575899f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:35, skipping insertion in model container [2022-01-09 23:30:35,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:30:35" (1/1) ... [2022-01-09 23:30:35,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:30:35,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:30:35,810 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_label23.c[57306,57319] [2022-01-09 23:30:35,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:30:35,851 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:30:36,018 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_label23.c[57306,57319] [2022-01-09 23:30:36,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:30:36,041 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:30:36,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36 WrapperNode [2022-01-09 23:30:36,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:30:36,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:30:36,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:30:36,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:30:36,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,152 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-01-09 23:30:36,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:30:36,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:30:36,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:30:36,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:30:36,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:30:36,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:30:36,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:30:36,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:30:36,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (1/1) ... [2022-01-09 23:30:36,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:30:36,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:36,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 23:30:36,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 23:30:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:30:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:30:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:30:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:30:36,334 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:30:36,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:30:37,471 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:30:37,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:30:37,483 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 23:30:37,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:30:37 BoogieIcfgContainer [2022-01-09 23:30:37,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:30:37,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:30:37,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:30:37,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:30:37,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:30:35" (1/3) ... [2022-01-09 23:30:37,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa6972b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:30:37, skipping insertion in model container [2022-01-09 23:30:37,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:30:36" (2/3) ... [2022-01-09 23:30:37,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa6972b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:30:37, skipping insertion in model container [2022-01-09 23:30:37,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:30:37" (3/3) ... [2022-01-09 23:30:37,491 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label23.c [2022-01-09 23:30:37,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:30:37,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:30:37,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:30:37,541 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 23:30:37,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:30:37,561 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) [2022-01-09 23:30:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-09 23:30:37,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:37,580 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] [2022-01-09 23:30:37,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 552287235, now seen corresponding path program 1 times [2022-01-09 23:30:37,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:37,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319782941] [2022-01-09 23:30:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:37,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:37,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:37,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319782941] [2022-01-09 23:30:37,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319782941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:37,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:37,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:37,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390612594] [2022-01-09 23:30:37,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:37,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:37,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:38,019 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 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:38,879 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2022-01-09 23:30:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 171 [2022-01-09 23:30:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:38,890 INFO L225 Difference]: With dead ends: 835 [2022-01-09 23:30:38,891 INFO L226 Difference]: Without dead ends: 456 [2022-01-09 23:30:38,893 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 [2022-01-09 23:30:38,896 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 117 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:38,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:30:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-09 23:30:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2022-01-09 23:30:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2022-01-09 23:30:38,942 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 171 [2022-01-09 23:30:38,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:38,943 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2022-01-09 23:30:38,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2022-01-09 23:30:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-09 23:30:38,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:38,946 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-09 23:30:38,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:30:38,946 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash 453121461, now seen corresponding path program 1 times [2022-01-09 23:30:38,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:38,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347941731] [2022-01-09 23:30:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:38,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:39,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347941731] [2022-01-09 23:30:39,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347941731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:39,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:39,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:39,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790025066] [2022-01-09 23:30:39,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:39,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:39,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:39,042 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:39,683 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2022-01-09 23:30:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:39,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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 177 [2022-01-09 23:30:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:39,687 INFO L225 Difference]: With dead ends: 1340 [2022-01-09 23:30:39,687 INFO L226 Difference]: Without dead ends: 891 [2022-01-09 23:30:39,688 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 [2022-01-09 23:30:39,689 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:39,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-09 23:30:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2022-01-09 23:30:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2022-01-09 23:30:39,712 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 177 [2022-01-09 23:30:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:39,712 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2022-01-09 23:30:39,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2022-01-09 23:30:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-09 23:30:39,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:39,717 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-09 23:30:39,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:30:39,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash -620762647, now seen corresponding path program 1 times [2022-01-09 23:30:39,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:39,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741448537] [2022-01-09 23:30:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:39,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:30:39,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:39,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741448537] [2022-01-09 23:30:39,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741448537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:39,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:39,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:39,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350551076] [2022-01-09 23:30:39,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:39,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:39,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:39,820 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:40,432 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2022-01-09 23:30:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:40,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 181 [2022-01-09 23:30:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:40,438 INFO L225 Difference]: With dead ends: 2612 [2022-01-09 23:30:40,438 INFO L226 Difference]: Without dead ends: 1727 [2022-01-09 23:30:40,439 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 [2022-01-09 23:30:40,440 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:40,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 112 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-01-09 23:30:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-01-09 23:30:40,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.472737819025522) internal successors, (2539), 1724 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2539 transitions. [2022-01-09 23:30:40,467 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2539 transitions. Word has length 181 [2022-01-09 23:30:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:40,468 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 2539 transitions. [2022-01-09 23:30:40,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2539 transitions. [2022-01-09 23:30:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-09 23:30:40,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:40,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-01-09 23:30:40,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:30:40,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:40,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1890998063, now seen corresponding path program 1 times [2022-01-09 23:30:40,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:40,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198774517] [2022-01-09 23:30:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:40,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:30:40,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198774517] [2022-01-09 23:30:40,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198774517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:40,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:40,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:40,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371826334] [2022-01-09 23:30:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:40,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:40,547 INFO L87 Difference]: Start difference. First operand 1725 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:41,125 INFO L93 Difference]: Finished difference Result 5073 states and 7473 transitions. [2022-01-09 23:30:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 183 [2022-01-09 23:30:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:41,136 INFO L225 Difference]: With dead ends: 5073 [2022-01-09 23:30:41,137 INFO L226 Difference]: Without dead ends: 3350 [2022-01-09 23:30:41,140 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 [2022-01-09 23:30:41,141 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:41,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 194 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:30:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2022-01-09 23:30:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2022-01-09 23:30:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.3114362496267542) internal successors, (4392), 3349 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4392 transitions. [2022-01-09 23:30:41,208 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4392 transitions. Word has length 183 [2022-01-09 23:30:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:41,208 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 4392 transitions. [2022-01-09 23:30:41,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4392 transitions. [2022-01-09 23:30:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-09 23:30:41,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:41,214 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2022-01-09 23:30:41,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:30:41,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash 522709419, now seen corresponding path program 1 times [2022-01-09 23:30:41,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:41,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179593760] [2022-01-09 23:30:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:41,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:41,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:41,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179593760] [2022-01-09 23:30:41,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179593760] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:41,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:41,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:41,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115381951] [2022-01-09 23:30:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:41,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:41,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:41,278 INFO L87 Difference]: Start difference. First operand 3350 states and 4392 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:41,983 INFO L93 Difference]: Finished difference Result 9360 states and 12381 transitions. [2022-01-09 23:30:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 192 [2022-01-09 23:30:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:42,004 INFO L225 Difference]: With dead ends: 9360 [2022-01-09 23:30:42,004 INFO L226 Difference]: Without dead ends: 6012 [2022-01-09 23:30:42,010 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 [2022-01-09 23:30:42,011 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:42,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 389 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2022-01-09 23:30:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6006. [2022-01-09 23:30:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.2509575353871774) internal successors, (7512), 6005 states have internal predecessors, (7512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 7512 transitions. [2022-01-09 23:30:42,101 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 7512 transitions. Word has length 192 [2022-01-09 23:30:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:42,101 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 7512 transitions. [2022-01-09 23:30:42,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 7512 transitions. [2022-01-09 23:30:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-09 23:30:42,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:42,110 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:30:42,110 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1310007592, now seen corresponding path program 1 times [2022-01-09 23:30:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:42,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995495035] [2022-01-09 23:30:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:42,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-09 23:30:42,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:42,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995495035] [2022-01-09 23:30:42,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995495035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:42,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:42,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:42,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723910908] [2022-01-09 23:30:42,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:42,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:42,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:42,181 INFO L87 Difference]: Start difference. First operand 6006 states and 7512 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:42,902 INFO L93 Difference]: Finished difference Result 17366 states and 21844 transitions. [2022-01-09 23:30:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2022-01-09 23:30:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:42,939 INFO L225 Difference]: With dead ends: 17366 [2022-01-09 23:30:42,939 INFO L226 Difference]: Without dead ends: 11362 [2022-01-09 23:30:42,952 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 [2022-01-09 23:30:42,955 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:42,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 156 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2022-01-09 23:30:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 11346. [2022-01-09 23:30:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11346 states, 11345 states have (on average 1.2510356985456148) internal successors, (14193), 11345 states have internal predecessors, (14193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11346 states to 11346 states and 14193 transitions. [2022-01-09 23:30:43,168 INFO L78 Accepts]: Start accepts. Automaton has 11346 states and 14193 transitions. Word has length 211 [2022-01-09 23:30:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:43,169 INFO L470 AbstractCegarLoop]: Abstraction has 11346 states and 14193 transitions. [2022-01-09 23:30:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11346 states and 14193 transitions. [2022-01-09 23:30:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-09 23:30:43,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:43,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-09 23:30:43,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-09 23:30:43,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1224459605, now seen corresponding path program 1 times [2022-01-09 23:30:43,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132084499] [2022-01-09 23:30:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:43,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:30:43,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132084499] [2022-01-09 23:30:43,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132084499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:43,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:43,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:30:43,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017621883] [2022-01-09 23:30:43,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:43,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:43,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:43,256 INFO L87 Difference]: Start difference. First operand 11346 states and 14193 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:44,030 INFO L93 Difference]: Finished difference Result 32530 states and 40858 transitions. [2022-01-09 23:30:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 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 211 [2022-01-09 23:30:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:44,082 INFO L225 Difference]: With dead ends: 32530 [2022-01-09 23:30:44,083 INFO L226 Difference]: Without dead ends: 21186 [2022-01-09 23:30:44,094 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 [2022-01-09 23:30:44,097 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:44,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 176 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:30:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21186 states. [2022-01-09 23:30:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21186 to 21165. [2022-01-09 23:30:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21165 states, 21164 states have (on average 1.2293517293517293) internal successors, (26018), 21164 states have internal predecessors, (26018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21165 states to 21165 states and 26018 transitions. [2022-01-09 23:30:44,377 INFO L78 Accepts]: Start accepts. Automaton has 21165 states and 26018 transitions. Word has length 211 [2022-01-09 23:30:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:44,378 INFO L470 AbstractCegarLoop]: Abstraction has 21165 states and 26018 transitions. [2022-01-09 23:30:44,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 21165 states and 26018 transitions. [2022-01-09 23:30:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-09 23:30:44,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:44,402 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-01-09 23:30:44,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-09 23:30:44,403 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -733869352, now seen corresponding path program 1 times [2022-01-09 23:30:44,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826451365] [2022-01-09 23:30:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:44,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:44,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:44,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826451365] [2022-01-09 23:30:44,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826451365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:44,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:44,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:44,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412912958] [2022-01-09 23:30:44,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:44,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:30:44,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:44,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:30:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:30:44,478 INFO L87 Difference]: Start difference. First operand 21165 states and 26018 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:45,506 INFO L93 Difference]: Finished difference Result 72044 states and 89595 transitions. [2022-01-09 23:30:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:30:45,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 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 216 [2022-01-09 23:30:45,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:45,601 INFO L225 Difference]: With dead ends: 72044 [2022-01-09 23:30:45,601 INFO L226 Difference]: Without dead ends: 50881 [2022-01-09 23:30:45,626 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 [2022-01-09 23:30:45,626 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 514 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:45,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 522 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:30:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50881 states. [2022-01-09 23:30:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50881 to 50854. [2022-01-09 23:30:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50854 states, 50853 states have (on average 1.2254930879200834) internal successors, (62320), 50853 states have internal predecessors, (62320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50854 states to 50854 states and 62320 transitions. [2022-01-09 23:30:46,307 INFO L78 Accepts]: Start accepts. Automaton has 50854 states and 62320 transitions. Word has length 216 [2022-01-09 23:30:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:46,308 INFO L470 AbstractCegarLoop]: Abstraction has 50854 states and 62320 transitions. [2022-01-09 23:30:46,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 50854 states and 62320 transitions. [2022-01-09 23:30:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-09 23:30:46,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:46,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-09 23:30:46,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-09 23:30:46,344 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash 303799372, now seen corresponding path program 1 times [2022-01-09 23:30:46,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:46,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242405681] [2022-01-09 23:30:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:46,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-09 23:30:46,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242405681] [2022-01-09 23:30:46,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242405681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696406933] [2022-01-09 23:30:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:46,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:46,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:30:46,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:30:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:46,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:30:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:30:47,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:47,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696406933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:47,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:47,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-01-09 23:30:47,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124475325] [2022-01-09 23:30:47,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:47,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:47,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:47,036 INFO L87 Difference]: Start difference. First operand 50854 states and 62320 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:48,065 INFO L93 Difference]: Finished difference Result 122459 states and 151099 transitions. [2022-01-09 23:30:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 [2022-01-09 23:30:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:48,221 INFO L225 Difference]: With dead ends: 122459 [2022-01-09 23:30:48,221 INFO L226 Difference]: Without dead ends: 72622 [2022-01-09 23:30:48,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:30:48,267 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:48,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 201 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:30:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72622 states. [2022-01-09 23:30:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72622 to 72610. [2022-01-09 23:30:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72610 states, 72609 states have (on average 1.2094093018771777) internal successors, (87814), 72609 states have internal predecessors, (87814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72610 states to 72610 states and 87814 transitions. [2022-01-09 23:30:49,165 INFO L78 Accepts]: Start accepts. Automaton has 72610 states and 87814 transitions. Word has length 219 [2022-01-09 23:30:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:49,166 INFO L470 AbstractCegarLoop]: Abstraction has 72610 states and 87814 transitions. [2022-01-09 23:30:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 72610 states and 87814 transitions. [2022-01-09 23:30:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-09 23:30:49,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:49,205 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-01-09 23:30:49,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:30:49,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:49,421 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1740772773, now seen corresponding path program 1 times [2022-01-09 23:30:49,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:49,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568480504] [2022-01-09 23:30:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:49,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:30:49,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568480504] [2022-01-09 23:30:49,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568480504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:30:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210075779] [2022-01-09 23:30:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:49,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:30:49,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:30:49,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:30:49,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:30:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:30:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:30:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:30:50,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:30:50,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210075779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:50,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:30:50,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:30:50,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022989802] [2022-01-09 23:30:50,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:50,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:30:50,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:30:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:30:50,160 INFO L87 Difference]: Start difference. First operand 72610 states and 87814 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:51,418 INFO L93 Difference]: Finished difference Result 154465 states and 187940 transitions. [2022-01-09 23:30:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:30:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 [2022-01-09 23:30:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:51,525 INFO L225 Difference]: With dead ends: 154465 [2022-01-09 23:30:51,525 INFO L226 Difference]: Without dead ends: 82263 [2022-01-09 23:30:51,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:30:51,724 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 570 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:51,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 570 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 23:30:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82263 states. [2022-01-09 23:30:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82263 to 82173. [2022-01-09 23:30:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82173 states, 82172 states have (on average 1.2141118629216765) internal successors, (99766), 82172 states have internal predecessors, (99766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82173 states to 82173 states and 99766 transitions. [2022-01-09 23:30:52,751 INFO L78 Accepts]: Start accepts. Automaton has 82173 states and 99766 transitions. Word has length 219 [2022-01-09 23:30:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:52,751 INFO L470 AbstractCegarLoop]: Abstraction has 82173 states and 99766 transitions. [2022-01-09 23:30:52,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 82173 states and 99766 transitions. [2022-01-09 23:30:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-09 23:30:52,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:52,791 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-01-09 23:30:52,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:30:53,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:30:53,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash 653008864, now seen corresponding path program 1 times [2022-01-09 23:30:53,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:53,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696289438] [2022-01-09 23:30:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:53,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:30:53,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696289438] [2022-01-09 23:30:53,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696289438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:53,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:53,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:53,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958077179] [2022-01-09 23:30:53,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:53,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:53,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:53,099 INFO L87 Difference]: Start difference. First operand 82173 states and 99766 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:54,436 INFO L93 Difference]: Finished difference Result 206356 states and 251393 transitions. [2022-01-09 23:30:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:54,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 [2022-01-09 23:30:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:54,621 INFO L225 Difference]: With dead ends: 206356 [2022-01-09 23:30:54,621 INFO L226 Difference]: Without dead ends: 125202 [2022-01-09 23:30:54,682 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 [2022-01-09 23:30:54,683 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 214 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:54,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 169 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:30:54,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125202 states. [2022-01-09 23:30:56,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125202 to 125193. [2022-01-09 23:30:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125193 states, 125192 states have (on average 1.1930554668029907) internal successors, (149361), 125192 states have internal predecessors, (149361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125193 states to 125193 states and 149361 transitions. [2022-01-09 23:30:56,444 INFO L78 Accepts]: Start accepts. Automaton has 125193 states and 149361 transitions. Word has length 227 [2022-01-09 23:30:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:30:56,445 INFO L470 AbstractCegarLoop]: Abstraction has 125193 states and 149361 transitions. [2022-01-09 23:30:56,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 125193 states and 149361 transitions. [2022-01-09 23:30:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-09 23:30:56,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:30:56,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:30:56,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-09 23:30:56,504 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:30:56,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:30:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1803762388, now seen corresponding path program 1 times [2022-01-09 23:30:56,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:30:56,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191650740] [2022-01-09 23:30:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:30:56,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:30:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:30:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:30:56,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:30:56,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191650740] [2022-01-09 23:30:56,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191650740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:30:56,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:30:56,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:30:56,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166815942] [2022-01-09 23:30:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:30:56,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:30:56,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:30:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:30:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:30:56,589 INFO L87 Difference]: Start difference. First operand 125193 states and 149361 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:30:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:30:58,129 INFO L93 Difference]: Finished difference Result 262034 states and 316213 transitions. [2022-01-09 23:30:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:30:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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 237 [2022-01-09 23:30:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:30:58,299 INFO L225 Difference]: With dead ends: 262034 [2022-01-09 23:30:58,300 INFO L226 Difference]: Without dead ends: 137860 [2022-01-09 23:30:58,333 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 [2022-01-09 23:30:58,333 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 187 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:30:58,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 405 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:30:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137860 states. [2022-01-09 23:30:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137860 to 137852. [2022-01-09 23:31:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137852 states, 137851 states have (on average 1.1325634199244112) internal successors, (156125), 137851 states have internal predecessors, (156125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137852 states to 137852 states and 156125 transitions. [2022-01-09 23:31:00,230 INFO L78 Accepts]: Start accepts. Automaton has 137852 states and 156125 transitions. Word has length 237 [2022-01-09 23:31:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 137852 states and 156125 transitions. [2022-01-09 23:31:00,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 137852 states and 156125 transitions. [2022-01-09 23:31:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-09 23:31:00,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:00,274 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, 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] [2022-01-09 23:31:00,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-09 23:31:00,274 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash 242455262, now seen corresponding path program 1 times [2022-01-09 23:31:00,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:00,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571058577] [2022-01-09 23:31:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:00,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:00,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:00,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571058577] [2022-01-09 23:31:00,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571058577] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:00,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:00,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:31:00,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402669915] [2022-01-09 23:31:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:00,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:00,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:00,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:00,359 INFO L87 Difference]: Start difference. First operand 137852 states and 156125 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:01,957 INFO L93 Difference]: Finished difference Result 300986 states and 342322 transitions. [2022-01-09 23:31:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 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 246 [2022-01-09 23:31:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:02,206 INFO L225 Difference]: With dead ends: 300986 [2022-01-09 23:31:02,206 INFO L226 Difference]: Without dead ends: 164153 [2022-01-09 23:31:02,288 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 [2022-01-09 23:31:02,290 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:02,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 221 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:31:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164153 states. [2022-01-09 23:31:04,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164153 to 156371. [2022-01-09 23:31:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156371 states, 156370 states have (on average 1.143422651403722) internal successors, (178797), 156370 states have internal predecessors, (178797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156371 states to 156371 states and 178797 transitions. [2022-01-09 23:31:04,560 INFO L78 Accepts]: Start accepts. Automaton has 156371 states and 178797 transitions. Word has length 246 [2022-01-09 23:31:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:04,560 INFO L470 AbstractCegarLoop]: Abstraction has 156371 states and 178797 transitions. [2022-01-09 23:31:04,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 156371 states and 178797 transitions. [2022-01-09 23:31:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-09 23:31:04,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:04,847 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-09 23:31:04,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-09 23:31:04,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:04,858 INFO L85 PathProgramCache]: Analyzing trace with hash 825721825, now seen corresponding path program 1 times [2022-01-09 23:31:04,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:04,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761963673] [2022-01-09 23:31:04,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:04,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-09 23:31:04,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761963673] [2022-01-09 23:31:04,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761963673] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:04,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:04,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:04,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092065612] [2022-01-09 23:31:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:04,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:04,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:31:04,951 INFO L87 Difference]: Start difference. First operand 156371 states and 178797 transitions. Second operand has 4 states, 4 states have (on average 53.5) 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) [2022-01-09 23:31:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:07,179 INFO L93 Difference]: Finished difference Result 453592 states and 517677 transitions. [2022-01-09 23:31:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:31:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) 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 250 [2022-01-09 23:31:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:07,622 INFO L225 Difference]: With dead ends: 453592 [2022-01-09 23:31:07,622 INFO L226 Difference]: Without dead ends: 298445 [2022-01-09 23:31:07,683 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 [2022-01-09 23:31:07,684 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 557 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:07,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 389 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:31:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298445 states. [2022-01-09 23:31:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298445 to 298434. [2022-01-09 23:31:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298434 states, 298433 states have (on average 1.1392573877553756) internal successors, (339992), 298433 states have internal predecessors, (339992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298434 states to 298434 states and 339992 transitions. [2022-01-09 23:31:11,966 INFO L78 Accepts]: Start accepts. Automaton has 298434 states and 339992 transitions. Word has length 250 [2022-01-09 23:31:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:11,966 INFO L470 AbstractCegarLoop]: Abstraction has 298434 states and 339992 transitions. [2022-01-09 23:31:11,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) 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) [2022-01-09 23:31:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 298434 states and 339992 transitions. [2022-01-09 23:31:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-09 23:31:12,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:12,010 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:12,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-09 23:31:12,010 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 428661306, now seen corresponding path program 1 times [2022-01-09 23:31:12,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:12,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796760765] [2022-01-09 23:31:12,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:12,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 23:31:12,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:12,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796760765] [2022-01-09 23:31:12,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796760765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:12,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:12,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:12,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660778263] [2022-01-09 23:31:12,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:12,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:12,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:12,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:12,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:12,092 INFO L87 Difference]: Start difference. First operand 298434 states and 339992 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:14,866 INFO L93 Difference]: Finished difference Result 600382 states and 687575 transitions. [2022-01-09 23:31:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 270 [2022-01-09 23:31:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:15,376 INFO L225 Difference]: With dead ends: 600382 [2022-01-09 23:31:15,376 INFO L226 Difference]: Without dead ends: 287135 [2022-01-09 23:31:15,509 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 [2022-01-09 23:31:15,509 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 175 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:15,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 386 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:31:15,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287135 states. [2022-01-09 23:31:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287135 to 191972. [2022-01-09 23:31:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191972 states, 191971 states have (on average 1.1320459861124856) internal successors, (217320), 191971 states have internal predecessors, (217320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191972 states to 191972 states and 217320 transitions. [2022-01-09 23:31:19,315 INFO L78 Accepts]: Start accepts. Automaton has 191972 states and 217320 transitions. Word has length 270 [2022-01-09 23:31:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:19,316 INFO L470 AbstractCegarLoop]: Abstraction has 191972 states and 217320 transitions. [2022-01-09 23:31:19,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 191972 states and 217320 transitions. [2022-01-09 23:31:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-09 23:31:19,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:19,348 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:19,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-09 23:31:19,348 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:19,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:19,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1278404839, now seen corresponding path program 1 times [2022-01-09 23:31:19,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:19,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662881586] [2022-01-09 23:31:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:19,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:31:19,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662881586] [2022-01-09 23:31:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662881586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:31:19,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546418267] [2022-01-09 23:31:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:19,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:19,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:31:19,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:31:19,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:31:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:19,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:31:19,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:31:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:31:20,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:31:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546418267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:20,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:31:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-09 23:31:20,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542686906] [2022-01-09 23:31:20,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:20,248 INFO L87 Difference]: Start difference. First operand 191972 states and 217320 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:22,285 INFO L93 Difference]: Finished difference Result 376391 states and 426365 transitions. [2022-01-09 23:31:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:22,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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 279 [2022-01-09 23:31:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:22,701 INFO L225 Difference]: With dead ends: 376391 [2022-01-09 23:31:22,701 INFO L226 Difference]: Without dead ends: 185438 [2022-01-09 23:31:22,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:31:22,790 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 100 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:22,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 334 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:31:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185438 states. [2022-01-09 23:31:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185438 to 181165. [2022-01-09 23:31:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181165 states, 181164 states have (on average 1.1190081914729195) internal successors, (202724), 181164 states have internal predecessors, (202724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181165 states to 181165 states and 202724 transitions. [2022-01-09 23:31:25,397 INFO L78 Accepts]: Start accepts. Automaton has 181165 states and 202724 transitions. Word has length 279 [2022-01-09 23:31:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:25,398 INFO L470 AbstractCegarLoop]: Abstraction has 181165 states and 202724 transitions. [2022-01-09 23:31:25,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 181165 states and 202724 transitions. [2022-01-09 23:31:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-09 23:31:25,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:25,426 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:31:25,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:31:25,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:31:25,628 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1304360969, now seen corresponding path program 1 times [2022-01-09 23:31:25,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477070183] [2022-01-09 23:31:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:25,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:31:25,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:25,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477070183] [2022-01-09 23:31:25,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477070183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:25,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:25,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:25,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39307241] [2022-01-09 23:31:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:25,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:31:25,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:31:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:31:25,714 INFO L87 Difference]: Start difference. First operand 181165 states and 202724 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:31:27,130 INFO L93 Difference]: Finished difference Result 343389 states and 383179 transitions. [2022-01-09 23:31:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:31:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 283 [2022-01-09 23:31:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:31:27,554 INFO L225 Difference]: With dead ends: 343389 [2022-01-09 23:31:27,554 INFO L226 Difference]: Without dead ends: 159794 [2022-01-09 23:31:27,620 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 [2022-01-09 23:31:27,627 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 244 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:31:27,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 353 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 23:31:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159794 states. [2022-01-09 23:31:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159794 to 139271. [2022-01-09 23:31:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139271 states, 139270 states have (on average 1.0925971135204997) internal successors, (152166), 139270 states have internal predecessors, (152166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139271 states to 139271 states and 152166 transitions. [2022-01-09 23:31:29,664 INFO L78 Accepts]: Start accepts. Automaton has 139271 states and 152166 transitions. Word has length 283 [2022-01-09 23:31:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:31:29,665 INFO L470 AbstractCegarLoop]: Abstraction has 139271 states and 152166 transitions. [2022-01-09 23:31:29,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:31:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 139271 states and 152166 transitions. [2022-01-09 23:31:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-09 23:31:29,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:31:29,685 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, 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] [2022-01-09 23:31:29,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-09 23:31:29,685 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:31:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:31:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash -890870113, now seen corresponding path program 1 times [2022-01-09 23:31:29,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:31:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664632013] [2022-01-09 23:31:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:31:29,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:31:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:31:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:31:29,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:31:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664632013] [2022-01-09 23:31:29,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664632013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:31:29,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:31:29,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:31:29,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055757666] [2022-01-09 23:31:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:31:29,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:31:29,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:31:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:31:29,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:31:29,778 INFO L87 Difference]: Start difference. First operand 139271 states and 152166 transitions. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 3 states have internal predecessors, (257), 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)