/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 10:09:39,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 10:09:39,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 10:09:39,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 10:09:39,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 10:09:39,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 10:09:39,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 10:09:39,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 10:09:39,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 10:09:39,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 10:09:39,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 10:09:39,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 10:09:39,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 10:09:39,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 10:09:39,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 10:09:39,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 10:09:39,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 10:09:39,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 10:09:39,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 10:09:39,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 10:09:39,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 10:09:39,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 10:09:39,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 10:09:39,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 10:09:39,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 10:09:39,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 10:09:39,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 10:09:39,523 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 10:09:39,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 10:09:39,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 10:09:39,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 10:09:39,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 10:09:39,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:09:39,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 10:09:39,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 10:09:39,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 10:09:39,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 10:09:39,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 10:09:39,527 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 10:09:39,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 10:09:39,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 10:09:39,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 10:09:39,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 10:09:39,528 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 10:09:39,528 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 10:09:39,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 10:09:39,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 10:09:39,731 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 10:09:39,732 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 10:09:39,735 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 10:09:39,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2022-01-10 10:09:39,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720564be4/77c0f63227ff458fbd4d2c749371ed0d/FLAGd13311ccf [2022-01-10 10:09:40,213 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 10:09:40,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2022-01-10 10:09:40,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720564be4/77c0f63227ff458fbd4d2c749371ed0d/FLAGd13311ccf [2022-01-10 10:09:40,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720564be4/77c0f63227ff458fbd4d2c749371ed0d [2022-01-10 10:09:40,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 10:09:40,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 10:09:40,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 10:09:40,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 10:09:40,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 10:09:40,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:09:40" (1/1) ... [2022-01-10 10:09:40,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602f09b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:40, skipping insertion in model container [2022-01-10 10:09:40,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:09:40" (1/1) ... [2022-01-10 10:09:40,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 10:09:40,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 10:09:41,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c[58665,58678] [2022-01-10 10:09:41,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:09:41,078 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 10:09:41,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c[58665,58678] [2022-01-10 10:09:41,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:09:41,251 INFO L208 MainTranslator]: Completed translation [2022-01-10 10:09:41,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41 WrapperNode [2022-01-10 10:09:41,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 10:09:41,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 10:09:41,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 10:09:41,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 10:09:41,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,281 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,368 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 10:09:41,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 10:09:41,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 10:09:41,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 10:09:41,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 10:09:41,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 10:09:41,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 10:09:41,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 10:09:41,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 10:09:41,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (1/1) ... [2022-01-10 10:09:41,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:09:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:09:41,561 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 10:09:41,590 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 10:09:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 10:09:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 10:09:41,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 10:09:41,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 10:09:41,684 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 10:09:41,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 10:09:43,202 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 10:09:43,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 10:09:43,211 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 10:09:43,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:09:43 BoogieIcfgContainer [2022-01-10 10:09:43,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 10:09:43,214 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 10:09:43,214 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 10:09:43,215 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 10:09:43,217 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:09:43" (1/1) ... [2022-01-10 10:09:43,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:09:43 BasicIcfg [2022-01-10 10:09:43,558 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 10:09:43,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 10:09:43,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 10:09:43,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 10:09:43,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 10:09:40" (1/4) ... [2022-01-10 10:09:43,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f3422c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:09:43, skipping insertion in model container [2022-01-10 10:09:43,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:09:41" (2/4) ... [2022-01-10 10:09:43,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f3422c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:09:43, skipping insertion in model container [2022-01-10 10:09:43,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:09:43" (3/4) ... [2022-01-10 10:09:43,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f3422c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 10:09:43, skipping insertion in model container [2022-01-10 10:09:43,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:09:43" (4/4) ... [2022-01-10 10:09:43,563 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label10.cTransformedIcfg [2022-01-10 10:09:43,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 10:09:43,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 10:09:43,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 10:09:43,613 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 10:09:43,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 10:09:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-10 10:09:43,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:43,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:43,650 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1729541413, now seen corresponding path program 1 times [2022-01-10 10:09:43,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:43,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370864073] [2022-01-10 10:09:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:43,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:09:44,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:44,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370864073] [2022-01-10 10:09:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370864073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:44,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:44,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:09:44,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416358348] [2022-01-10 10:09:44,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:44,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:44,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:44,412 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:45,547 INFO L93 Difference]: Finished difference Result 860 states and 1507 transitions. [2022-01-10 10:09:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-01-10 10:09:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:45,559 INFO L225 Difference]: With dead ends: 860 [2022-01-10 10:09:45,559 INFO L226 Difference]: Without dead ends: 465 [2022-01-10 10:09:45,573 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 10:09:45,575 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 123 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:45,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 169 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:09:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-10 10:09:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-10 10:09:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.556768558951965) internal successors, (713), 458 states have internal predecessors, (713), 0 states have call successors, (0), 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 10:09:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2022-01-10 10:09:45,619 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 181 [2022-01-10 10:09:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:45,620 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2022-01-10 10:09:45,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2022-01-10 10:09:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 10:09:45,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:45,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:45,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 10:09:45,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -721922879, now seen corresponding path program 1 times [2022-01-10 10:09:45,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079464126] [2022-01-10 10:09:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:45,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:09:45,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:45,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079464126] [2022-01-10 10:09:45,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079464126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:45,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:45,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:09:45,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460856352] [2022-01-10 10:09:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:45,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:45,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:45,749 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 10:09:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:46,710 INFO L93 Difference]: Finished difference Result 1343 states and 2102 transitions. [2022-01-10 10:09:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 189 [2022-01-10 10:09:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:46,723 INFO L225 Difference]: With dead ends: 1343 [2022-01-10 10:09:46,723 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 10:09:46,724 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 10:09:46,725 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:46,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 93 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:09:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 10:09:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 868. [2022-01-10 10:09:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.532871972318339) internal successors, (1329), 867 states have internal predecessors, (1329), 0 states have call successors, (0), 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 10:09:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1329 transitions. [2022-01-10 10:09:46,758 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1329 transitions. Word has length 189 [2022-01-10 10:09:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:46,758 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1329 transitions. [2022-01-10 10:09:46,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 10:09:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1329 transitions. [2022-01-10 10:09:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-10 10:09:46,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:46,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:46,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 10:09:46,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash -204603837, now seen corresponding path program 1 times [2022-01-10 10:09:46,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:46,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485010043] [2022-01-10 10:09:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:46,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:09:46,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485010043] [2022-01-10 10:09:46,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485010043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:46,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:46,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:09:46,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152759256] [2022-01-10 10:09:46,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:46,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:46,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:46,893 INFO L87 Difference]: Start difference. First operand 868 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 10:09:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:47,456 INFO L93 Difference]: Finished difference Result 1710 states and 2622 transitions. [2022-01-10 10:09:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:47,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-01-10 10:09:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:47,464 INFO L225 Difference]: With dead ends: 1710 [2022-01-10 10:09:47,465 INFO L226 Difference]: Without dead ends: 844 [2022-01-10 10:09:47,469 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 10:09:47,472 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:47,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 10:09:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-10 10:09:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2022-01-10 10:09:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.4768683274021353) internal successors, (1245), 843 states have internal predecessors, (1245), 0 states have call successors, (0), 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 10:09:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1245 transitions. [2022-01-10 10:09:47,493 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1245 transitions. Word has length 194 [2022-01-10 10:09:47,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:47,495 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1245 transitions. [2022-01-10 10:09:47,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 10:09:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1245 transitions. [2022-01-10 10:09:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 10:09:47,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:47,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:47,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 10:09:47,501 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash 384702049, now seen corresponding path program 1 times [2022-01-10 10:09:47,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:47,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714136224] [2022-01-10 10:09:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:47,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:09:47,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714136224] [2022-01-10 10:09:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714136224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:47,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:09:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251764857] [2022-01-10 10:09:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:47,628 INFO L87 Difference]: Start difference. First operand 844 states and 1245 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 10:09:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:48,532 INFO L93 Difference]: Finished difference Result 2515 states and 3715 transitions. [2022-01-10 10:09:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 195 [2022-01-10 10:09:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:48,537 INFO L225 Difference]: With dead ends: 2515 [2022-01-10 10:09:48,537 INFO L226 Difference]: Without dead ends: 1673 [2022-01-10 10:09:48,538 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 10:09:48,542 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 241 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:48,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 92 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:09:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-01-10 10:09:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1672. [2022-01-10 10:09:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.4105326152004787) internal successors, (2357), 1671 states have internal predecessors, (2357), 0 states have call successors, (0), 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 10:09:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2357 transitions. [2022-01-10 10:09:48,570 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2357 transitions. Word has length 195 [2022-01-10 10:09:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:48,570 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2357 transitions. [2022-01-10 10:09:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 10:09:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2357 transitions. [2022-01-10 10:09:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-10 10:09:48,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:48,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:48,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 10:09:48,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1006188701, now seen corresponding path program 1 times [2022-01-10 10:09:48,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:48,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081301880] [2022-01-10 10:09:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:48,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:09:48,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081301880] [2022-01-10 10:09:48,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081301880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:48,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:48,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:09:48,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047895175] [2022-01-10 10:09:48,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:48,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:48,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:48,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:48,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:48,663 INFO L87 Difference]: Start difference. First operand 1672 states and 2357 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 10:09:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:49,720 INFO L93 Difference]: Finished difference Result 4174 states and 5863 transitions. [2022-01-10 10:09:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 196 [2022-01-10 10:09:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:49,727 INFO L225 Difference]: With dead ends: 4174 [2022-01-10 10:09:49,727 INFO L226 Difference]: Without dead ends: 2504 [2022-01-10 10:09:49,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:49,730 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:49,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 68 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:09:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-01-10 10:09:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2503. [2022-01-10 10:09:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 1.3916866506794565) internal successors, (3482), 2502 states have internal predecessors, (3482), 0 states have call successors, (0), 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 10:09:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3482 transitions. [2022-01-10 10:09:49,764 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3482 transitions. Word has length 196 [2022-01-10 10:09:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:49,765 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 3482 transitions. [2022-01-10 10:09:49,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 10:09:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3482 transitions. [2022-01-10 10:09:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 10:09:49,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:49,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:49,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 10:09:49,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:49,777 INFO L85 PathProgramCache]: Analyzing trace with hash 936342151, now seen corresponding path program 1 times [2022-01-10 10:09:49,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:49,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508146911] [2022-01-10 10:09:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:49,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:09:49,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508146911] [2022-01-10 10:09:49,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508146911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:49,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:49,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:09:49,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702369528] [2022-01-10 10:09:49,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:49,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:49,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:49,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:49,868 INFO L87 Difference]: Start difference. First operand 2503 states and 3482 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 10:09:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:50,319 INFO L93 Difference]: Finished difference Result 7478 states and 10404 transitions. [2022-01-10 10:09:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 201 [2022-01-10 10:09:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:50,332 INFO L225 Difference]: With dead ends: 7478 [2022-01-10 10:09:50,333 INFO L226 Difference]: Without dead ends: 4977 [2022-01-10 10:09:50,337 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 10:09:50,339 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 325 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:50,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 494 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 10:09:50,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-01-10 10:09:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4975. [2022-01-10 10:09:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 1.3882187374346602) internal successors, (6905), 4974 states have internal predecessors, (6905), 0 states have call successors, (0), 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 10:09:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 6905 transitions. [2022-01-10 10:09:50,428 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 6905 transitions. Word has length 201 [2022-01-10 10:09:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:50,428 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 6905 transitions. [2022-01-10 10:09:50,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 10:09:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 6905 transitions. [2022-01-10 10:09:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 10:09:50,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:50,434 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:50,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 10:09:50,435 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -282162423, now seen corresponding path program 1 times [2022-01-10 10:09:50,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:50,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268968038] [2022-01-10 10:09:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:50,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:09:50,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268968038] [2022-01-10 10:09:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268968038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:50,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:50,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:09:50,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755099512] [2022-01-10 10:09:50,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:50,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:50,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:50,566 INFO L87 Difference]: Start difference. First operand 4975 states and 6905 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 10:09:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:51,637 INFO L93 Difference]: Finished difference Result 9930 states and 13776 transitions. [2022-01-10 10:09:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 203 [2022-01-10 10:09:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:51,650 INFO L225 Difference]: With dead ends: 9930 [2022-01-10 10:09:51,650 INFO L226 Difference]: Without dead ends: 4957 [2022-01-10 10:09:51,656 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 10:09:51,658 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 253 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:51,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 339 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:09:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-01-10 10:09:51,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4955. [2022-01-10 10:09:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 1.28118691966088) internal successors, (6347), 4954 states have internal predecessors, (6347), 0 states have call successors, (0), 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 10:09:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 6347 transitions. [2022-01-10 10:09:51,729 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 6347 transitions. Word has length 203 [2022-01-10 10:09:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 6347 transitions. [2022-01-10 10:09:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 10:09:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 6347 transitions. [2022-01-10 10:09:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 10:09:51,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:51,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:51,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 10:09:51,737 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2130930139, now seen corresponding path program 1 times [2022-01-10 10:09:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:51,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287759397] [2022-01-10 10:09:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:51,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:09:51,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:51,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287759397] [2022-01-10 10:09:51,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287759397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:51,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:51,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:09:51,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668608438] [2022-01-10 10:09:51,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:51,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:51,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:51,864 INFO L87 Difference]: Start difference. First operand 4955 states and 6347 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:52,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:52,754 INFO L93 Difference]: Finished difference Result 14784 states and 18937 transitions. [2022-01-10 10:09:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:52,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-01-10 10:09:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:52,778 INFO L225 Difference]: With dead ends: 14784 [2022-01-10 10:09:52,778 INFO L226 Difference]: Without dead ends: 9831 [2022-01-10 10:09:52,785 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 10:09:52,786 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 196 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:52,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 375 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:09:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9831 states. [2022-01-10 10:09:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9831 to 9827. [2022-01-10 10:09:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9827 states, 9826 states have (on average 1.1806431915326685) internal successors, (11601), 9826 states have internal predecessors, (11601), 0 states have call successors, (0), 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 10:09:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 11601 transitions. [2022-01-10 10:09:53,005 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 11601 transitions. Word has length 219 [2022-01-10 10:09:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:53,006 INFO L470 AbstractCegarLoop]: Abstraction has 9827 states and 11601 transitions. [2022-01-10 10:09:53,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 11601 transitions. [2022-01-10 10:09:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 10:09:53,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:53,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:53,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 10:09:53,018 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -256661889, now seen corresponding path program 1 times [2022-01-10 10:09:53,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:53,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081474798] [2022-01-10 10:09:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:53,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:09:53,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081474798] [2022-01-10 10:09:53,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081474798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:53,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:53,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:09:53,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817679592] [2022-01-10 10:09:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:53,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:09:53,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:53,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:09:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:09:53,143 INFO L87 Difference]: Start difference. First operand 9827 states and 11601 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 10:09:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:54,258 INFO L93 Difference]: Finished difference Result 31921 states and 37851 transitions. [2022-01-10 10:09:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:09:54,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-01-10 10:09:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:54,292 INFO L225 Difference]: With dead ends: 31921 [2022-01-10 10:09:54,292 INFO L226 Difference]: Without dead ends: 22096 [2022-01-10 10:09:54,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:09:54,305 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 528 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:54,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 478 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:09:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22096 states. [2022-01-10 10:09:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22096 to 22078. [2022-01-10 10:09:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22078 states, 22077 states have (on average 1.1824070299406622) internal successors, (26104), 22077 states have internal predecessors, (26104), 0 states have call successors, (0), 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 10:09:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22078 states to 22078 states and 26104 transitions. [2022-01-10 10:09:54,711 INFO L78 Accepts]: Start accepts. Automaton has 22078 states and 26104 transitions. Word has length 219 [2022-01-10 10:09:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:54,711 INFO L470 AbstractCegarLoop]: Abstraction has 22078 states and 26104 transitions. [2022-01-10 10:09:54,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 10:09:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 22078 states and 26104 transitions. [2022-01-10 10:09:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-10 10:09:54,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:54,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:54,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 10:09:54,724 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash -619330742, now seen corresponding path program 1 times [2022-01-10 10:09:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327402339] [2022-01-10 10:09:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:54,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:09:54,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327402339] [2022-01-10 10:09:54,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327402339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 10:09:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243446917] [2022-01-10 10:09:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:54,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 10:09:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:09:54,939 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 10:09:54,945 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 10:09:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 6576 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 10:09:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 10:09:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:09:56,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 10:09:56,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243446917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:56,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 10:09:56,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 10:09:56,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406346611] [2022-01-10 10:09:56,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:56,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:56,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:09:56,029 INFO L87 Difference]: Start difference. First operand 22078 states and 26104 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 10:09:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:56,870 INFO L93 Difference]: Finished difference Result 44160 states and 52216 transitions. [2022-01-10 10:09:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 229 [2022-01-10 10:09:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:56,901 INFO L225 Difference]: With dead ends: 44160 [2022-01-10 10:09:56,901 INFO L226 Difference]: Without dead ends: 22084 [2022-01-10 10:09:56,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:09:56,917 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:56,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 47 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 10:09:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2022-01-10 10:09:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 22078. [2022-01-10 10:09:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22078 states, 22077 states have (on average 1.1802328214884268) internal successors, (26056), 22077 states have internal predecessors, (26056), 0 states have call successors, (0), 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 10:09:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22078 states to 22078 states and 26056 transitions. [2022-01-10 10:09:57,237 INFO L78 Accepts]: Start accepts. Automaton has 22078 states and 26056 transitions. Word has length 229 [2022-01-10 10:09:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:57,238 INFO L470 AbstractCegarLoop]: Abstraction has 22078 states and 26056 transitions. [2022-01-10 10:09:57,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 10:09:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22078 states and 26056 transitions. [2022-01-10 10:09:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-10 10:09:57,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:57,253 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:57,276 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 10:09:57,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 10:09:57,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1828207988, now seen corresponding path program 1 times [2022-01-10 10:09:57,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:57,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597076671] [2022-01-10 10:09:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:57,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-10 10:09:57,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:57,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597076671] [2022-01-10 10:09:57,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597076671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:57,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:57,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:09:57,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465507601] [2022-01-10 10:09:57,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:57,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:57,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:57,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:57,685 INFO L87 Difference]: Start difference. First operand 22078 states and 26056 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:09:58,670 INFO L93 Difference]: Finished difference Result 54716 states and 65478 transitions. [2022-01-10 10:09:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:09:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2022-01-10 10:09:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:09:58,722 INFO L225 Difference]: With dead ends: 54716 [2022-01-10 10:09:58,722 INFO L226 Difference]: Without dead ends: 32640 [2022-01-10 10:09:58,744 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 10:09:58,744 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:09:58,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 135 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:09:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32640 states. [2022-01-10 10:09:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32640 to 32634. [2022-01-10 10:09:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32634 states, 32633 states have (on average 1.1539852296754818) internal successors, (37658), 32633 states have internal predecessors, (37658), 0 states have call successors, (0), 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 10:09:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32634 states to 32634 states and 37658 transitions. [2022-01-10 10:09:59,262 INFO L78 Accepts]: Start accepts. Automaton has 32634 states and 37658 transitions. Word has length 258 [2022-01-10 10:09:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:09:59,263 INFO L470 AbstractCegarLoop]: Abstraction has 32634 states and 37658 transitions. [2022-01-10 10:09:59,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:09:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 32634 states and 37658 transitions. [2022-01-10 10:09:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-10 10:09:59,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:09:59,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:09:59,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 10:09:59,277 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:09:59,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:09:59,278 INFO L85 PathProgramCache]: Analyzing trace with hash -796485633, now seen corresponding path program 1 times [2022-01-10 10:09:59,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:09:59,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564978542] [2022-01-10 10:09:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:09:59,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:09:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:09:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:09:59,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:09:59,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564978542] [2022-01-10 10:09:59,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564978542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:09:59,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:09:59,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:09:59,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216566928] [2022-01-10 10:09:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:09:59,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:09:59,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:09:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:09:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:09:59,523 INFO L87 Difference]: Start difference. First operand 32634 states and 37658 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 10:10:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:00,454 INFO L93 Difference]: Finished difference Result 72202 states and 83548 transitions. [2022-01-10 10:10:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 281 [2022-01-10 10:10:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:00,502 INFO L225 Difference]: With dead ends: 72202 [2022-01-10 10:10:00,502 INFO L226 Difference]: Without dead ends: 39570 [2022-01-10 10:10:00,522 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 10:10:00,523 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:00,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 351 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 10:10:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39570 states. [2022-01-10 10:10:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39570 to 39560. [2022-01-10 10:10:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39560 states, 39559 states have (on average 1.14568113450795) internal successors, (45322), 39559 states have internal predecessors, (45322), 0 states have call successors, (0), 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 10:10:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39560 states to 39560 states and 45322 transitions. [2022-01-10 10:10:01,081 INFO L78 Accepts]: Start accepts. Automaton has 39560 states and 45322 transitions. Word has length 281 [2022-01-10 10:10:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:01,081 INFO L470 AbstractCegarLoop]: Abstraction has 39560 states and 45322 transitions. [2022-01-10 10:10:01,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 10:10:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 39560 states and 45322 transitions. [2022-01-10 10:10:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-10 10:10:01,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:01,102 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:01,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 10:10:01,102 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:01,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1999811071, now seen corresponding path program 1 times [2022-01-10 10:10:01,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:01,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740209461] [2022-01-10 10:10:01,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:01,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:01,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:01,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740209461] [2022-01-10 10:10:01,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740209461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:01,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:01,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:01,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803571525] [2022-01-10 10:10:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:01,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:01,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:01,292 INFO L87 Difference]: Start difference. First operand 39560 states and 45322 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 10:10:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:02,767 INFO L93 Difference]: Finished difference Result 81584 states and 93500 transitions. [2022-01-10 10:10:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:02,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 297 [2022-01-10 10:10:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:02,844 INFO L225 Difference]: With dead ends: 81584 [2022-01-10 10:10:02,844 INFO L226 Difference]: Without dead ends: 42026 [2022-01-10 10:10:02,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:02,863 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 351 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:02,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 90 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 10:10:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42026 states. [2022-01-10 10:10:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42026 to 39560. [2022-01-10 10:10:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39560 states, 39559 states have (on average 1.14568113450795) internal successors, (45322), 39559 states have internal predecessors, (45322), 0 states have call successors, (0), 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 10:10:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39560 states to 39560 states and 45322 transitions. [2022-01-10 10:10:03,276 INFO L78 Accepts]: Start accepts. Automaton has 39560 states and 45322 transitions. Word has length 297 [2022-01-10 10:10:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:03,276 INFO L470 AbstractCegarLoop]: Abstraction has 39560 states and 45322 transitions. [2022-01-10 10:10:03,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 10:10:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 39560 states and 45322 transitions. [2022-01-10 10:10:03,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-10 10:10:03,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:03,292 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:03,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 10:10:03,293 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash 851003183, now seen corresponding path program 1 times [2022-01-10 10:10:03,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:03,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949485761] [2022-01-10 10:10:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:03,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 10:10:03,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:03,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949485761] [2022-01-10 10:10:03,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949485761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:03,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:03,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:03,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181360611] [2022-01-10 10:10:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:03,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:03,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:03,444 INFO L87 Difference]: Start difference. First operand 39560 states and 45322 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:04,587 INFO L93 Difference]: Finished difference Result 94791 states and 108938 transitions. [2022-01-10 10:10:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:04,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 335 [2022-01-10 10:10:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:04,662 INFO L225 Difference]: With dead ends: 94791 [2022-01-10 10:10:04,662 INFO L226 Difference]: Without dead ends: 53609 [2022-01-10 10:10:04,693 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 10:10:04,694 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:04,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 341 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53609 states. [2022-01-10 10:10:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53609 to 50116. [2022-01-10 10:10:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50116 states, 50115 states have (on average 1.1024443779307593) internal successors, (55249), 50115 states have internal predecessors, (55249), 0 states have call successors, (0), 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 10:10:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50116 states to 50116 states and 55249 transitions. [2022-01-10 10:10:05,472 INFO L78 Accepts]: Start accepts. Automaton has 50116 states and 55249 transitions. Word has length 335 [2022-01-10 10:10:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:05,472 INFO L470 AbstractCegarLoop]: Abstraction has 50116 states and 55249 transitions. [2022-01-10 10:10:05,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50116 states and 55249 transitions. [2022-01-10 10:10:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 10:10:05,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:05,489 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:05,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 10:10:05,490 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash 490483037, now seen corresponding path program 1 times [2022-01-10 10:10:05,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:05,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695414166] [2022-01-10 10:10:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:05,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-10 10:10:05,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695414166] [2022-01-10 10:10:05,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695414166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 10:10:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433047399] [2022-01-10 10:10:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:05,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 10:10:05,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:10:05,632 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 10:10:05,633 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 10:10:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:06,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 10018 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 10:10:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 10:10:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:10:07,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 10:10:07,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433047399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:07,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 10:10:07,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-01-10 10:10:07,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266842865] [2022-01-10 10:10:07,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:07,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:07,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 10:10:07,690 INFO L87 Difference]: Start difference. First operand 50116 states and 55249 transitions. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 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 10:10:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:09,040 INFO L93 Difference]: Finished difference Result 171692 states and 189084 transitions. [2022-01-10 10:10:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:09,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 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 342 [2022-01-10 10:10:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:09,193 INFO L225 Difference]: With dead ends: 171692 [2022-01-10 10:10:09,193 INFO L226 Difference]: Without dead ends: 121578 [2022-01-10 10:10:09,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 340 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 10:10:09,362 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 507 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:09,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 284 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121578 states. [2022-01-10 10:10:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121578 to 121557. [2022-01-10 10:10:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121557 states, 121556 states have (on average 1.1000361973082364) internal successors, (133716), 121556 states have internal predecessors, (133716), 0 states have call successors, (0), 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 10:10:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121557 states to 121557 states and 133716 transitions. [2022-01-10 10:10:11,032 INFO L78 Accepts]: Start accepts. Automaton has 121557 states and 133716 transitions. Word has length 342 [2022-01-10 10:10:11,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:11,032 INFO L470 AbstractCegarLoop]: Abstraction has 121557 states and 133716 transitions. [2022-01-10 10:10:11,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 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 10:10:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 121557 states and 133716 transitions. [2022-01-10 10:10:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-10 10:10:11,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:11,106 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:11,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 10:10:11,330 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,SelfDestructingSolverStorable14 [2022-01-10 10:10:11,330 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1584760478, now seen corresponding path program 1 times [2022-01-10 10:10:11,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:11,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570685008] [2022-01-10 10:10:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:11,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 10:10:11,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:11,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570685008] [2022-01-10 10:10:11,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570685008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 10:10:11,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466858417] [2022-01-10 10:10:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:11,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 10:10:11,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:10:11,707 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 10:10:11,708 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 10:10:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 10821 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 10:10:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 10:10:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 10:10:13,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 10:10:13,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466858417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:13,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 10:10:13,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 10:10:13,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777558205] [2022-01-10 10:10:13,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:13,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:13,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:10:13,175 INFO L87 Difference]: Start difference. First operand 121557 states and 133716 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 10:10:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:14,765 INFO L93 Difference]: Finished difference Result 312580 states and 344465 transitions. [2022-01-10 10:10:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:14,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 368 [2022-01-10 10:10:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:15,238 INFO L225 Difference]: With dead ends: 312580 [2022-01-10 10:10:15,238 INFO L226 Difference]: Without dead ends: 191025 [2022-01-10 10:10:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 10:10:15,337 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 156 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:15,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 120 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191025 states. [2022-01-10 10:10:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191025 to 181853. [2022-01-10 10:10:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181853 states, 181852 states have (on average 1.0970239535446407) internal successors, (199496), 181852 states have internal predecessors, (199496), 0 states have call successors, (0), 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 10:10:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181853 states to 181853 states and 199496 transitions. [2022-01-10 10:10:18,037 INFO L78 Accepts]: Start accepts. Automaton has 181853 states and 199496 transitions. Word has length 368 [2022-01-10 10:10:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:18,037 INFO L470 AbstractCegarLoop]: Abstraction has 181853 states and 199496 transitions. [2022-01-10 10:10:18,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 10:10:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 181853 states and 199496 transitions. [2022-01-10 10:10:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-10 10:10:18,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:18,092 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 10:10:18,117 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 10:10:18,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 10:10:18,314 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1035865193, now seen corresponding path program 1 times [2022-01-10 10:10:18,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795849679] [2022-01-10 10:10:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:18,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 10:10:18,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795849679] [2022-01-10 10:10:18,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795849679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:18,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:18,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:18,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307348445] [2022-01-10 10:10:18,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:18,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:18,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:18,771 INFO L87 Difference]: Start difference. First operand 181853 states and 199496 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 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 10:10:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:20,824 INFO L93 Difference]: Finished difference Result 400554 states and 440363 transitions. [2022-01-10 10:10:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 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 414 [2022-01-10 10:10:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:21,150 INFO L225 Difference]: With dead ends: 400554 [2022-01-10 10:10:21,150 INFO L226 Difference]: Without dead ends: 218703 [2022-01-10 10:10:21,197 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 10:10:21,197 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:21,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 128 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 10:10:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218703 states. [2022-01-10 10:10:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218703 to 211702. [2022-01-10 10:10:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211702 states, 211701 states have (on average 1.1005710884691144) internal successors, (232992), 211701 states have internal predecessors, (232992), 0 states have call successors, (0), 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 10:10:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211702 states to 211702 states and 232992 transitions. [2022-01-10 10:10:24,248 INFO L78 Accepts]: Start accepts. Automaton has 211702 states and 232992 transitions. Word has length 414 [2022-01-10 10:10:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:24,249 INFO L470 AbstractCegarLoop]: Abstraction has 211702 states and 232992 transitions. [2022-01-10 10:10:24,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 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 10:10:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 211702 states and 232992 transitions. [2022-01-10 10:10:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-10 10:10:24,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:24,609 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 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] [2022-01-10 10:10:24,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 10:10:24,609 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1318013373, now seen corresponding path program 1 times [2022-01-10 10:10:24,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463135556] [2022-01-10 10:10:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:24,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-10 10:10:24,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:24,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463135556] [2022-01-10 10:10:24,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463135556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:24,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:24,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:24,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463464482] [2022-01-10 10:10:24,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:24,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:24,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:24,775 INFO L87 Difference]: Start difference. First operand 211702 states and 232992 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 10:10:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:26,609 INFO L93 Difference]: Finished difference Result 523618 states and 576262 transitions. [2022-01-10 10:10:26,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:26,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 419 [2022-01-10 10:10:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:27,385 INFO L225 Difference]: With dead ends: 523618 [2022-01-10 10:10:27,385 INFO L226 Difference]: Without dead ends: 311918 [2022-01-10 10:10:27,451 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 10:10:27,455 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 278 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:27,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 787 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 10:10:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311918 states. [2022-01-10 10:10:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311918 to 311102. [2022-01-10 10:10:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311102 states, 311101 states have (on average 1.09555096254914) internal successors, (340827), 311101 states have internal predecessors, (340827), 0 states have call successors, (0), 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 10:10:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311102 states to 311102 states and 340827 transitions. [2022-01-10 10:10:32,018 INFO L78 Accepts]: Start accepts. Automaton has 311102 states and 340827 transitions. Word has length 419 [2022-01-10 10:10:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:32,019 INFO L470 AbstractCegarLoop]: Abstraction has 311102 states and 340827 transitions. [2022-01-10 10:10:32,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 10:10:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 311102 states and 340827 transitions. [2022-01-10 10:10:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-10 10:10:32,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:32,095 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:32,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 10:10:32,096 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1022824367, now seen corresponding path program 1 times [2022-01-10 10:10:32,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:32,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691370668] [2022-01-10 10:10:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:32,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-10 10:10:32,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:32,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691370668] [2022-01-10 10:10:32,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691370668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:32,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:32,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:32,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517676119] [2022-01-10 10:10:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:32,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:32,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:32,818 INFO L87 Difference]: Start difference. First operand 311102 states and 340827 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 10:10:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:35,449 INFO L93 Difference]: Finished difference Result 625293 states and 684933 transitions. [2022-01-10 10:10:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 434 [2022-01-10 10:10:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:36,501 INFO L225 Difference]: With dead ends: 625293 [2022-01-10 10:10:36,501 INFO L226 Difference]: Without dead ends: 314193 [2022-01-10 10:10:36,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:36,770 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 329 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:36,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 136 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314193 states.