/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/Problem16_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:20:36,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:20:36,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:20:36,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 00:20:36,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 00:20:36,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 00:20:36,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 00:20:36,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 00:20:36,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 00:20:36,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 00:20:36,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 00:20:36,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 00:20:36,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 00:20:36,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 00:20:36,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 00:20:36,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 00:20:36,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 00:20:36,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 00:20:36,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 00:20:36,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 00:20:36,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 00:20:36,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 00:20:36,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 00:20:36,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 00:20:36,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 00:20:36,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 00:20:36,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 00:20:36,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 00:20:36,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 00:20:36,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 00:20:36,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 00:20:36,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 00:20:36,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 00:20:36,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 00:20:36,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 00:20:36,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 00:20:36,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 00:20:36,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 00:20:36,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 00:20:36,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 00:20:36,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 00:20:36,438 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 [2022-01-10 00:20:36,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:20:36,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:20:36,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:20:36,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:20:36,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:20:36,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:20:36,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:20:36,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:20:36,453 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:20:36,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:20:36,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:20:36,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:20:36,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:20:36,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:20:36,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:20:36,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:20:36,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:20:36,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:20:36,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:20:36,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:20:36,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:20:36,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:20:36,645 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:20:36,645 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:20:36,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2022-01-10 00:20:36,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68c3fd216/3037cfa30eb847f190413425b433fb02/FLAG1ddc69b14 [2022-01-10 00:20:37,151 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:20:37,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2022-01-10 00:20:37,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68c3fd216/3037cfa30eb847f190413425b433fb02/FLAG1ddc69b14 [2022-01-10 00:20:37,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68c3fd216/3037cfa30eb847f190413425b433fb02 [2022-01-10 00:20:37,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:20:37,474 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:20:37,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:20:37,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:20:37,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:20:37,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:20:37" (1/1) ... [2022-01-10 00:20:37,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a4d603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:37, skipping insertion in model container [2022-01-10 00:20:37,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:20:37" (1/1) ... [2022-01-10 00:20:37,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:20:37,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:20:37,757 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/Problem16_label21.c[4121,4134] [2022-01-10 00:20:37,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:20:37,973 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:20:37,994 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/Problem16_label21.c[4121,4134] [2022-01-10 00:20:38,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:20:38,130 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:20:38,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38 WrapperNode [2022-01-10 00:20:38,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:20:38,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:20:38,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:20:38,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:20:38,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,296 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2022-01-10 00:20:38,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:20:38,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:20:38,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:20:38,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:20:38,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:20:38,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:20:38,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:20:38,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:20:38,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (1/1) ... [2022-01-10 00:20:38,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:20:38,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:20:38,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 00:20:38,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 00:20:38,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:20:38,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:20:38,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:20:38,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:20:38,532 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:20:38,534 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:20:39,944 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:20:39,956 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:20:39,956 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 00:20:39,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:20:39 BoogieIcfgContainer [2022-01-10 00:20:39,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:20:39,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:20:39,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:20:39,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:20:39,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:20:37" (1/3) ... [2022-01-10 00:20:39,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474e1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:20:39, skipping insertion in model container [2022-01-10 00:20:39,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:20:38" (2/3) ... [2022-01-10 00:20:39,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474e1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:20:39, skipping insertion in model container [2022-01-10 00:20:39,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:20:39" (3/3) ... [2022-01-10 00:20:39,964 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label21.c [2022-01-10 00:20:39,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:20:39,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:20:40,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:20:40,016 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 00:20:40,016 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:20:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 00:20:40,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:40,048 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] [2022-01-10 00:20:40,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2022-01-10 00:20:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:40,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508658803] [2022-01-10 00:20:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:40,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:20:40,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508658803] [2022-01-10 00:20:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508658803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:40,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:40,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329220314] [2022-01-10 00:20:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:40,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:20:40,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:20:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:20:40,359 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:42,536 INFO L93 Difference]: Finished difference Result 1456 states and 2764 transitions. [2022-01-10 00:20:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:20:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2022-01-10 00:20:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:42,550 INFO L225 Difference]: With dead ends: 1456 [2022-01-10 00:20:42,551 INFO L226 Difference]: Without dead ends: 991 [2022-01-10 00:20:42,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:20:42,557 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1073 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:42,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 96 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 00:20:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-01-10 00:20:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2022-01-10 00:20:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.497979797979798) internal successors, (1483), 990 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1483 transitions. [2022-01-10 00:20:42,650 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1483 transitions. Word has length 38 [2022-01-10 00:20:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:42,650 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1483 transitions. [2022-01-10 00:20:42,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1483 transitions. [2022-01-10 00:20:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-10 00:20:42,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:42,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:42,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:20:42,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1339527614, now seen corresponding path program 1 times [2022-01-10 00:20:42,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:42,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046465232] [2022-01-10 00:20:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:42,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:20:42,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:42,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046465232] [2022-01-10 00:20:42,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046465232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:42,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:42,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:42,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727346729] [2022-01-10 00:20:42,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:42,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:42,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:42,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:42,783 INFO L87 Difference]: Start difference. First operand 991 states and 1483 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:43,805 INFO L93 Difference]: Finished difference Result 1980 states and 3168 transitions. [2022-01-10 00:20:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2022-01-10 00:20:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:43,810 INFO L225 Difference]: With dead ends: 1980 [2022-01-10 00:20:43,811 INFO L226 Difference]: Without dead ends: 1320 [2022-01-10 00:20:43,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:43,813 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 279 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:43,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 539 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:20:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-01-10 00:20:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2022-01-10 00:20:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.423805913570887) internal successors, (1878), 1319 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1878 transitions. [2022-01-10 00:20:43,830 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1878 transitions. Word has length 228 [2022-01-10 00:20:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:43,831 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1878 transitions. [2022-01-10 00:20:43,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1878 transitions. [2022-01-10 00:20:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-10 00:20:43,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:43,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:43,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:20:43,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash -324745580, now seen corresponding path program 1 times [2022-01-10 00:20:43,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:43,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501824347] [2022-01-10 00:20:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:43,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-01-10 00:20:43,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:43,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501824347] [2022-01-10 00:20:43,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501824347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:43,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:43,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:20:43,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926544562] [2022-01-10 00:20:43,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:43,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:43,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:43,920 INFO L87 Difference]: Start difference. First operand 1320 states and 1878 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:44,961 INFO L93 Difference]: Finished difference Result 3296 states and 4947 transitions. [2022-01-10 00:20:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 231 [2022-01-10 00:20:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:44,969 INFO L225 Difference]: With dead ends: 3296 [2022-01-10 00:20:44,969 INFO L226 Difference]: Without dead ends: 1978 [2022-01-10 00:20:44,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:44,977 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 339 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:44,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 156 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:20:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-01-10 00:20:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2022-01-10 00:20:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.1335356600910471) internal successors, (2241), 1977 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2241 transitions. [2022-01-10 00:20:45,007 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2241 transitions. Word has length 231 [2022-01-10 00:20:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:45,008 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2241 transitions. [2022-01-10 00:20:45,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2241 transitions. [2022-01-10 00:20:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-10 00:20:45,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:45,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:45,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:20:45,033 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:45,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1462404787, now seen corresponding path program 1 times [2022-01-10 00:20:45,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110990548] [2022-01-10 00:20:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:45,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-10 00:20:45,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:45,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110990548] [2022-01-10 00:20:45,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110990548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:45,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:45,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:20:45,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056822451] [2022-01-10 00:20:45,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:45,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:45,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:45,176 INFO L87 Difference]: Start difference. First operand 1978 states and 2241 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:45,844 INFO L93 Difference]: Finished difference Result 3954 states and 4508 transitions. [2022-01-10 00:20:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 357 [2022-01-10 00:20:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:45,850 INFO L225 Difference]: With dead ends: 3954 [2022-01-10 00:20:45,850 INFO L226 Difference]: Without dead ends: 2307 [2022-01-10 00:20:45,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:45,853 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 262 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:45,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 31 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:20:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-01-10 00:20:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2022-01-10 00:20:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.092801387684302) internal successors, (2520), 2306 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2520 transitions. [2022-01-10 00:20:45,881 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2520 transitions. Word has length 357 [2022-01-10 00:20:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:45,881 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2520 transitions. [2022-01-10 00:20:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2520 transitions. [2022-01-10 00:20:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2022-01-10 00:20:45,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:45,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 00:20:45,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 00:20:45,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1707840837, now seen corresponding path program 1 times [2022-01-10 00:20:45,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233001942] [2022-01-10 00:20:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:45,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 645 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-01-10 00:20:46,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233001942] [2022-01-10 00:20:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233001942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:46,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:46,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:46,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044300160] [2022-01-10 00:20:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:46,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:46,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:46,105 INFO L87 Difference]: Start difference. First operand 2307 states and 2520 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:46,778 INFO L93 Difference]: Finished difference Result 5928 states and 6509 transitions. [2022-01-10 00:20:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 615 [2022-01-10 00:20:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:46,790 INFO L225 Difference]: With dead ends: 5928 [2022-01-10 00:20:46,790 INFO L226 Difference]: Without dead ends: 3952 [2022-01-10 00:20:46,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:46,795 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:46,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 428 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:20:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-01-10 00:20:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3623. [2022-01-10 00:20:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 1.0668139149641083) internal successors, (3864), 3622 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 3864 transitions. [2022-01-10 00:20:46,841 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 3864 transitions. Word has length 615 [2022-01-10 00:20:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:46,841 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 3864 transitions. [2022-01-10 00:20:46,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 3864 transitions. [2022-01-10 00:20:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2022-01-10 00:20:46,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:46,852 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:46,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 00:20:46,852 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash -276815383, now seen corresponding path program 1 times [2022-01-10 00:20:46,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:46,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833892106] [2022-01-10 00:20:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:46,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 719 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-10 00:20:47,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833892106] [2022-01-10 00:20:47,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833892106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:47,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:47,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:47,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968673911] [2022-01-10 00:20:47,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:47,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:47,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:47,049 INFO L87 Difference]: Start difference. First operand 3623 states and 3864 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:47,725 INFO L93 Difference]: Finished difference Result 8560 states and 9237 transitions. [2022-01-10 00:20:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 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 678 [2022-01-10 00:20:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:47,738 INFO L225 Difference]: With dead ends: 8560 [2022-01-10 00:20:47,738 INFO L226 Difference]: Without dead ends: 5268 [2022-01-10 00:20:47,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:47,742 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 171 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:47,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 432 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:20:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2022-01-10 00:20:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2022-01-10 00:20:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.0569584203531421) internal successors, (5567), 5267 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5567 transitions. [2022-01-10 00:20:47,852 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5567 transitions. Word has length 678 [2022-01-10 00:20:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:47,852 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 5567 transitions. [2022-01-10 00:20:47,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5567 transitions. [2022-01-10 00:20:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2022-01-10 00:20:47,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:47,867 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:47,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 00:20:47,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash 340514409, now seen corresponding path program 1 times [2022-01-10 00:20:47,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:47,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700223671] [2022-01-10 00:20:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:47,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 284 proven. 454 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-01-10 00:20:48,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700223671] [2022-01-10 00:20:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700223671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:20:48,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058438375] [2022-01-10 00:20:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:48,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:20:48,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:20:48,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:20:48,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 00:20:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:48,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 00:20:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:20:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-01-10 00:20:49,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:20:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058438375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:49,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:20:49,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-10 00:20:49,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748638887] [2022-01-10 00:20:49,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:49,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:49,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:20:49,178 INFO L87 Difference]: Start difference. First operand 5268 states and 5567 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:49,807 INFO L93 Difference]: Finished difference Result 10205 states and 10801 transitions. [2022-01-10 00:20:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 703 [2022-01-10 00:20:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:49,819 INFO L225 Difference]: With dead ends: 10205 [2022-01-10 00:20:49,820 INFO L226 Difference]: Without dead ends: 5268 [2022-01-10 00:20:49,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:20:49,825 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 258 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:49,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:20:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2022-01-10 00:20:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2022-01-10 00:20:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.0487943801025252) internal successors, (5524), 5267 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 5524 transitions. [2022-01-10 00:20:49,889 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 5524 transitions. Word has length 703 [2022-01-10 00:20:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:49,889 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 5524 transitions. [2022-01-10 00:20:49,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 5524 transitions. [2022-01-10 00:20:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2022-01-10 00:20:49,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:49,897 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 00:20:49,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 00:20:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:20:50,114 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 324362465, now seen corresponding path program 1 times [2022-01-10 00:20:50,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973338668] [2022-01-10 00:20:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:50,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1400 backedges. 644 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-01-10 00:20:50,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973338668] [2022-01-10 00:20:50,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973338668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:50,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:50,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:50,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825818654] [2022-01-10 00:20:50,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:50,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:50,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:50,363 INFO L87 Difference]: Start difference. First operand 5268 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:51,137 INFO L93 Difference]: Finished difference Result 11850 states and 12502 transitions. [2022-01-10 00:20:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 823 [2022-01-10 00:20:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:51,153 INFO L225 Difference]: With dead ends: 11850 [2022-01-10 00:20:51,153 INFO L226 Difference]: Without dead ends: 6913 [2022-01-10 00:20:51,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:51,159 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 220 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:51,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 80 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 00:20:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2022-01-10 00:20:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6913. [2022-01-10 00:20:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6913 states, 6912 states have (on average 1.0419560185185186) internal successors, (7202), 6912 states have internal predecessors, (7202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6913 states to 6913 states and 7202 transitions. [2022-01-10 00:20:51,235 INFO L78 Accepts]: Start accepts. Automaton has 6913 states and 7202 transitions. Word has length 823 [2022-01-10 00:20:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:51,236 INFO L470 AbstractCegarLoop]: Abstraction has 6913 states and 7202 transitions. [2022-01-10 00:20:51,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6913 states and 7202 transitions. [2022-01-10 00:20:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1147 [2022-01-10 00:20:51,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:51,273 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:51,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 00:20:51,273 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash -328135248, now seen corresponding path program 1 times [2022-01-10 00:20:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273788924] [2022-01-10 00:20:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:51,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2722 backedges. 1493 proven. 0 refuted. 0 times theorem prover too weak. 1229 trivial. 0 not checked. [2022-01-10 00:20:51,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273788924] [2022-01-10 00:20:51,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273788924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:51,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:51,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:51,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981800948] [2022-01-10 00:20:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:51,571 INFO L87 Difference]: Start difference. First operand 6913 states and 7202 transitions. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:52,350 INFO L93 Difference]: Finished difference Result 14811 states and 15467 transitions. [2022-01-10 00:20:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:52,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 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 1146 [2022-01-10 00:20:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:52,364 INFO L225 Difference]: With dead ends: 14811 [2022-01-10 00:20:52,364 INFO L226 Difference]: Without dead ends: 8229 [2022-01-10 00:20:52,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:52,371 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:52,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 439 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 00:20:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2022-01-10 00:20:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 7900. [2022-01-10 00:20:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.0375996961640714) internal successors, (8196), 7899 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8196 transitions. [2022-01-10 00:20:52,450 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8196 transitions. Word has length 1146 [2022-01-10 00:20:52,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:52,451 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 8196 transitions. [2022-01-10 00:20:52,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8196 transitions. [2022-01-10 00:20:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1165 [2022-01-10 00:20:52,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:52,484 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:52,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 00:20:52,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2097967269, now seen corresponding path program 1 times [2022-01-10 00:20:52,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:52,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711051910] [2022-01-10 00:20:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:52,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 1046 proven. 0 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2022-01-10 00:20:52,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711051910] [2022-01-10 00:20:52,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711051910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:52,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:52,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:52,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104219613] [2022-01-10 00:20:52,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:52,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:52,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:52,797 INFO L87 Difference]: Start difference. First operand 7900 states and 8196 transitions. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:53,488 INFO L93 Difference]: Finished difference Result 16127 states and 16722 transitions. [2022-01-10 00:20:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:20:53,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 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 1164 [2022-01-10 00:20:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:53,499 INFO L225 Difference]: With dead ends: 16127 [2022-01-10 00:20:53,499 INFO L226 Difference]: Without dead ends: 7900 [2022-01-10 00:20:53,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:53,506 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 172 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:53,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 410 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:20:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2022-01-10 00:20:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7571. [2022-01-10 00:20:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 1.0276089828269486) internal successors, (7779), 7570 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7779 transitions. [2022-01-10 00:20:53,615 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7779 transitions. Word has length 1164 [2022-01-10 00:20:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:53,616 INFO L470 AbstractCegarLoop]: Abstraction has 7571 states and 7779 transitions. [2022-01-10 00:20:53,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7779 transitions. [2022-01-10 00:20:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1320 [2022-01-10 00:20:53,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:53,638 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:53,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 00:20:53,639 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash 230213051, now seen corresponding path program 1 times [2022-01-10 00:20:53,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161583776] [2022-01-10 00:20:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:53,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2898 backedges. 2132 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-01-10 00:20:54,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161583776] [2022-01-10 00:20:54,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161583776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:54,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:54,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 00:20:54,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573285612] [2022-01-10 00:20:54,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:54,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 00:20:54,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 00:20:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 00:20:54,140 INFO L87 Difference]: Start difference. First operand 7571 states and 7779 transitions. Second operand has 8 states, 8 states have (on average 99.75) internal successors, (798), 8 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:57,629 INFO L93 Difference]: Finished difference Result 21167 states and 21759 transitions. [2022-01-10 00:20:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 00:20:57,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 99.75) internal successors, (798), 8 states have internal predecessors, (798), 0 states have call successors, (0), 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 1319 [2022-01-10 00:20:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:57,649 INFO L225 Difference]: With dead ends: 21167 [2022-01-10 00:20:57,649 INFO L226 Difference]: Without dead ends: 13927 [2022-01-10 00:20:57,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-01-10 00:20:57,658 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 943 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 7420 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 7534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 7420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:57,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 1280 Invalid, 7534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 7420 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-10 00:20:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13927 states. [2022-01-10 00:20:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13927 to 7571. [2022-01-10 00:20:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 1.0269484808454425) internal successors, (7774), 7570 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 7774 transitions. [2022-01-10 00:20:57,757 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 7774 transitions. Word has length 1319 [2022-01-10 00:20:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:57,757 INFO L470 AbstractCegarLoop]: Abstraction has 7571 states and 7774 transitions. [2022-01-10 00:20:57,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.75) internal successors, (798), 8 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 7774 transitions. [2022-01-10 00:20:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1424 [2022-01-10 00:20:57,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:57,777 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-01-10 00:20:57,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 00:20:57,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 502523294, now seen corresponding path program 1 times [2022-01-10 00:20:57,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:57,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051907727] [2022-01-10 00:20:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:57,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 2495 proven. 0 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2022-01-10 00:20:58,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:58,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051907727] [2022-01-10 00:20:58,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051907727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:58,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:58,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 00:20:58,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796647753] [2022-01-10 00:20:58,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:58,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 00:20:58,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 00:20:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:20:58,229 INFO L87 Difference]: Start difference. First operand 7571 states and 7774 transitions. Second operand has 5 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:20:59,404 INFO L93 Difference]: Finished difference Result 15478 states and 15903 transitions. [2022-01-10 00:20:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 00:20:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 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 1423 [2022-01-10 00:20:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:20:59,416 INFO L225 Difference]: With dead ends: 15478 [2022-01-10 00:20:59,416 INFO L226 Difference]: Without dead ends: 8238 [2022-01-10 00:20:59,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:20:59,423 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 601 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:20:59,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 439 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 00:20:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2022-01-10 00:20:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7900. [2022-01-10 00:20:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.027471831877453) internal successors, (8116), 7899 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8116 transitions. [2022-01-10 00:20:59,495 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8116 transitions. Word has length 1423 [2022-01-10 00:20:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:20:59,496 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 8116 transitions. [2022-01-10 00:20:59,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.4) internal successors, (772), 5 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:20:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8116 transitions. [2022-01-10 00:20:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1618 [2022-01-10 00:20:59,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:20:59,548 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:20:59,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 00:20:59,549 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:20:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:20:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1728915728, now seen corresponding path program 1 times [2022-01-10 00:20:59,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:20:59,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045285222] [2022-01-10 00:20:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:20:59,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:20:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:20:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4783 backedges. 1166 proven. 0 refuted. 0 times theorem prover too weak. 3617 trivial. 0 not checked. [2022-01-10 00:20:59,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:20:59,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045285222] [2022-01-10 00:20:59,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045285222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:20:59,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:20:59,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:20:59,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605005548] [2022-01-10 00:20:59,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:20:59,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:20:59,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:20:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:20:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:20:59,999 INFO L87 Difference]: Start difference. First operand 7900 states and 8116 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:21:00,659 INFO L93 Difference]: Finished difference Result 17114 states and 17636 transitions. [2022-01-10 00:21:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:21:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 1617 [2022-01-10 00:21:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:21:00,671 INFO L225 Difference]: With dead ends: 17114 [2022-01-10 00:21:00,672 INFO L226 Difference]: Without dead ends: 9216 [2022-01-10 00:21:00,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:21:00,680 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 211 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:21:00,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 432 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:21:00,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2022-01-10 00:21:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 9216. [2022-01-10 00:21:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.02561041779707) internal successors, (9451), 9215 states have internal predecessors, (9451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9451 transitions. [2022-01-10 00:21:00,783 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9451 transitions. Word has length 1617 [2022-01-10 00:21:00,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:21:00,783 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9451 transitions. [2022-01-10 00:21:00,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9451 transitions. [2022-01-10 00:21:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1779 [2022-01-10 00:21:00,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:21:00,807 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:21:00,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 00:21:00,807 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:21:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:21:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1916689130, now seen corresponding path program 1 times [2022-01-10 00:21:00,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:21:00,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540800638] [2022-01-10 00:21:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:00,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:21:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5987 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 5628 trivial. 0 not checked. [2022-01-10 00:21:01,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:21:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540800638] [2022-01-10 00:21:01,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540800638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:21:01,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:21:01,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:21:01,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518600637] [2022-01-10 00:21:01,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:21:01,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:21:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:21:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:21:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:21:01,448 INFO L87 Difference]: Start difference. First operand 9216 states and 9451 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:21:02,222 INFO L93 Difference]: Finished difference Result 24023 states and 24655 transitions. [2022-01-10 00:21:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:21:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 1778 [2022-01-10 00:21:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:21:02,238 INFO L225 Difference]: With dead ends: 24023 [2022-01-10 00:21:02,238 INFO L226 Difference]: Without dead ends: 14809 [2022-01-10 00:21:02,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:21:02,262 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 299 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:21:02,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 56 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 00:21:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2022-01-10 00:21:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 12506. [2022-01-10 00:21:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.02702918832467) internal successors, (12843), 12505 states have internal predecessors, (12843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12843 transitions. [2022-01-10 00:21:02,395 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12843 transitions. Word has length 1778 [2022-01-10 00:21:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:21:02,395 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12843 transitions. [2022-01-10 00:21:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12843 transitions. [2022-01-10 00:21:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2003 [2022-01-10 00:21:02,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:21:02,461 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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] [2022-01-10 00:21:02,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 00:21:02,462 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:21:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:21:02,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1123888272, now seen corresponding path program 1 times [2022-01-10 00:21:02,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:21:02,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617338561] [2022-01-10 00:21:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:02,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:21:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6938 backedges. 4409 proven. 0 refuted. 0 times theorem prover too weak. 2529 trivial. 0 not checked. [2022-01-10 00:21:03,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:21:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617338561] [2022-01-10 00:21:03,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617338561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:21:03,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:21:03,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 00:21:03,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451044219] [2022-01-10 00:21:03,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:21:03,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 00:21:03,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:21:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 00:21:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:21:03,177 INFO L87 Difference]: Start difference. First operand 12506 states and 12843 transitions. Second operand has 6 states, 6 states have (on average 145.16666666666666) internal successors, (871), 6 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:21:04,637 INFO L93 Difference]: Finished difference Result 24708 states and 25380 transitions. [2022-01-10 00:21:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 00:21:04,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 145.16666666666666) internal successors, (871), 6 states have internal predecessors, (871), 0 states have call successors, (0), 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 2002 [2022-01-10 00:21:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:21:04,651 INFO L225 Difference]: With dead ends: 24708 [2022-01-10 00:21:04,651 INFO L226 Difference]: Without dead ends: 12506 [2022-01-10 00:21:04,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:21:04,661 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 152 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:21:04,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 446 Invalid, 3259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3234 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:21:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2022-01-10 00:21:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12506. [2022-01-10 00:21:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.025749700119952) internal successors, (12827), 12505 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12827 transitions. [2022-01-10 00:21:04,766 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12827 transitions. Word has length 2002 [2022-01-10 00:21:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:21:04,767 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12827 transitions. [2022-01-10 00:21:04,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.16666666666666) internal successors, (871), 6 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12827 transitions. [2022-01-10 00:21:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2047 [2022-01-10 00:21:04,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:21:04,836 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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] [2022-01-10 00:21:04,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 00:21:04,837 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:21:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:21:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash 914306066, now seen corresponding path program 1 times [2022-01-10 00:21:04,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:21:04,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144285877] [2022-01-10 00:21:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:04,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:21:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6949 backedges. 5738 proven. 10 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2022-01-10 00:21:05,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:21:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144285877] [2022-01-10 00:21:05,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144285877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:21:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180254735] [2022-01-10 00:21:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:05,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:21:05,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:21:05,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:21:05,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 00:21:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:06,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 2358 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 00:21:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:21:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6949 backedges. 2825 proven. 201 refuted. 0 times theorem prover too weak. 3923 trivial. 0 not checked. [2022-01-10 00:21:10,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:21:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6949 backedges. 2825 proven. 201 refuted. 0 times theorem prover too weak. 3923 trivial. 0 not checked. [2022-01-10 00:21:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180254735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:21:17,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:21:17,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 12 [2022-01-10 00:21:17,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560892517] [2022-01-10 00:21:17,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:21:17,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 00:21:17,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:21:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 00:21:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-10 00:21:17,677 INFO L87 Difference]: Start difference. First operand 12506 states and 12827 transitions. Second operand has 12 states, 12 states have (on average 196.16666666666666) internal successors, (2354), 12 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:21:25,378 INFO L93 Difference]: Finished difference Result 35644 states and 36568 transitions. [2022-01-10 00:21:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 00:21:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 196.16666666666666) internal successors, (2354), 12 states have internal predecessors, (2354), 0 states have call successors, (0), 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 2046 [2022-01-10 00:21:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:21:25,403 INFO L225 Difference]: With dead ends: 35644 [2022-01-10 00:21:25,403 INFO L226 Difference]: Without dead ends: 23469 [2022-01-10 00:21:25,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4139 GetRequests, 4107 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=840, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 00:21:25,414 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 1488 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 17402 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 17884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 17402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:21:25,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 569 Invalid, 17884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 17402 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-10 00:21:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23469 states. [2022-01-10 00:21:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23469 to 12506. [2022-01-10 00:21:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0241503398640543) internal successors, (12807), 12505 states have internal predecessors, (12807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12807 transitions. [2022-01-10 00:21:25,590 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12807 transitions. Word has length 2046 [2022-01-10 00:21:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:21:25,591 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12807 transitions. [2022-01-10 00:21:25,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 196.16666666666666) internal successors, (2354), 12 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12807 transitions. [2022-01-10 00:21:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2231 [2022-01-10 00:21:25,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:21:25,655 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2022-01-10 00:21:25,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 00:21:25,871 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,SelfDestructingSolverStorable15 [2022-01-10 00:21:25,872 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:21:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:21:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1806187156, now seen corresponding path program 1 times [2022-01-10 00:21:25,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:21:25,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94713202] [2022-01-10 00:21:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:25,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:21:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 2999 proven. 156 refuted. 0 times theorem prover too weak. 5962 trivial. 0 not checked. [2022-01-10 00:21:26,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:21:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94713202] [2022-01-10 00:21:26,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94713202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:21:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786099501] [2022-01-10 00:21:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:26,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:21:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:21:26,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:21:26,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 00:21:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 2590 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:21:26,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:21:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 3155 proven. 0 refuted. 0 times theorem prover too weak. 5962 trivial. 0 not checked. [2022-01-10 00:21:29,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:21:29,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786099501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:21:29,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:21:29,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-01-10 00:21:29,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661461124] [2022-01-10 00:21:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:21:29,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:21:29,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:21:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:21:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:21:29,766 INFO L87 Difference]: Start difference. First operand 12506 states and 12807 transitions. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:21:30,447 INFO L93 Difference]: Finished difference Result 26326 states and 26963 transitions. [2022-01-10 00:21:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:21:30,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 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 2230 [2022-01-10 00:21:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:21:30,459 INFO L225 Difference]: With dead ends: 26326 [2022-01-10 00:21:30,459 INFO L226 Difference]: Without dead ends: 14151 [2022-01-10 00:21:30,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2234 GetRequests, 2229 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:21:30,467 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:21:30,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 97 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 00:21:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2022-01-10 00:21:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13822. [2022-01-10 00:21:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0227190507199189) internal successors, (14135), 13821 states have internal predecessors, (14135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14135 transitions. [2022-01-10 00:21:30,648 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14135 transitions. Word has length 2230 [2022-01-10 00:21:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:21:30,648 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14135 transitions. [2022-01-10 00:21:30,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:21:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14135 transitions. [2022-01-10 00:21:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2294 [2022-01-10 00:21:30,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:21:30,685 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2022-01-10 00:21:30,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 00:21:30,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:21:30,900 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:21:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:21:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1188851207, now seen corresponding path program 1 times [2022-01-10 00:21:30,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:21:30,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170272160] [2022-01-10 00:21:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:30,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:21:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9435 backedges. 5457 proven. 1581 refuted. 0 times theorem prover too weak. 2397 trivial. 0 not checked. [2022-01-10 00:21:31,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:21:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170272160] [2022-01-10 00:21:31,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170272160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:21:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568799902] [2022-01-10 00:21:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:21:31,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:21:31,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:21:31,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:21:31,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 00:21:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:21:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:21:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates...