/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_LAZY.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:31:02,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:31:02,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:31:02,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 14:31:02,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:31:02,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:31:02,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:31:02,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:31:02,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:31:02,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:31:02,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:31:02,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:31:02,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:31:02,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:31:02,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:31:02,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:31:02,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 14:31:02,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 14:31:02,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 14:31:02,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 14:31:02,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 14:31:02,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 14:31:02,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 14:31:02,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 14:31:02,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 14:31:02,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 14:31:02,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 14:31:02,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 14:31:02,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 14:31:02,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:31:02,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:31:02,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:31:02,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:31:02,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:31:02,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:31:02,289 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:31:02,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:31:02,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:31:02,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:31:02,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:31:02,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:31:02,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:31:02,292 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:31:02,292 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:31:02,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:31:02,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:31:02,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:31:02,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:31:02,469 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:31:02,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2022-01-10 14:31:02,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d44eb88af/eb8820cfe86248eab88beede929ef910/FLAG0ddb42db5 [2022-01-10 14:31:02,832 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:31:02,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2022-01-10 14:31:02,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d44eb88af/eb8820cfe86248eab88beede929ef910/FLAG0ddb42db5 [2022-01-10 14:31:03,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d44eb88af/eb8820cfe86248eab88beede929ef910 [2022-01-10 14:31:03,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:31:03,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:31:03,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:31:03,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:31:03,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:31:03,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a729eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03, skipping insertion in model container [2022-01-10 14:31:03,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:31:03,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:31:03,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2022-01-10 14:31:03,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:31:03,512 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:31:03,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2022-01-10 14:31:03,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:31:03,559 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:31:03,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03 WrapperNode [2022-01-10 14:31:03,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:31:03,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:31:03,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:31:03,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:31:03,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,597 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-01-10 14:31:03,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:31:03,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:31:03,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:31:03,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:31:03,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:31:03,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:31:03,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:31:03,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:31:03,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:31:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:03,699 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 14:31:03,715 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 14:31:03,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:31:03,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:31:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:31:03,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:31:03,788 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:31:03,789 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:31:03,922 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:31:03,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:31:03,926 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 14:31:03,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:03 BoogieIcfgContainer [2022-01-10 14:31:03,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:31:03,928 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:31:03,928 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:31:03,929 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:31:03,931 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:03" (1/1) ... [2022-01-10 14:31:03,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:31:03 BasicIcfg [2022-01-10 14:31:03,989 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:31:03,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:31:03,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:31:03,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:31:03,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:31:03" (1/4) ... [2022-01-10 14:31:03,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72117979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:03, skipping insertion in model container [2022-01-10 14:31:03,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:03" (2/4) ... [2022-01-10 14:31:03,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72117979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:03, skipping insertion in model container [2022-01-10 14:31:03,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:03" (3/4) ... [2022-01-10 14:31:03,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72117979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:31:03, skipping insertion in model container [2022-01-10 14:31:03,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:31:03" (4/4) ... [2022-01-10 14:31:03,999 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de62.cTransformedIcfg [2022-01-10 14:31:04,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:31:04,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 14:31:04,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:31:04,035 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 14:31:04,035 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 14:31:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 14:31:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 14:31:04,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,051 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 847374992, now seen corresponding path program 1 times [2022-01-10 14:31:04,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834746662] [2022-01-10 14:31:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,165 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 14:31:04,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834746662] [2022-01-10 14:31:04,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834746662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:04,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:04,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 14:31:04,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139177011] [2022-01-10 14:31:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 14:31:04,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 14:31:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 14:31:04,189 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:31:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,198 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2022-01-10 14:31:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 14:31:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 14:31:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,204 INFO L225 Difference]: With dead ends: 31 [2022-01-10 14:31:04,204 INFO L226 Difference]: Without dead ends: 13 [2022-01-10 14:31:04,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 14:31:04,208 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-10 14:31:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-10 14:31:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 14:31:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-01-10 14:31:04,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2022-01-10 14:31:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,228 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-01-10 14:31:04,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:31:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-01-10 14:31:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 14:31:04,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:31:04,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash -984209330, now seen corresponding path program 1 times [2022-01-10 14:31:04,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122845787] [2022-01-10 14:31:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,298 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 14:31:04,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122845787] [2022-01-10 14:31:04,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122845787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:04,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:04,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 14:31:04,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785604482] [2022-01-10 14:31:04,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 14:31:04,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 14:31:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 14:31:04,301 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:31:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,341 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2022-01-10 14:31:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 14:31:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 14:31:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,342 INFO L225 Difference]: With dead ends: 27 [2022-01-10 14:31:04,342 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 14:31:04,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 14:31:04,343 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 14:31:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 14:31:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:31:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-01-10 14:31:04,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2022-01-10 14:31:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,348 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-01-10 14:31:04,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:31:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-01-10 14:31:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 14:31:04,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 14:31:04,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,350 INFO L85 PathProgramCache]: Analyzing trace with hash -444855131, now seen corresponding path program 1 times [2022-01-10 14:31:04,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353666900] [2022-01-10 14:31:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:31:04,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353666900] [2022-01-10 14:31:04,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353666900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:04,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:04,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:31:04,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896931367] [2022-01-10 14:31:04,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:31:04,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:31:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:31:04,391 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 14:31:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,406 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2022-01-10 14:31:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:31:04,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-01-10 14:31:04,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,407 INFO L225 Difference]: With dead ends: 41 [2022-01-10 14:31:04,407 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 14:31:04,407 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 14:31:04,408 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 14:31:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 14:31:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 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 14:31:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2022-01-10 14:31:04,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2022-01-10 14:31:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,413 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2022-01-10 14:31:04,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 14:31:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2022-01-10 14:31:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 14:31:04,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:31:04,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -419920064, now seen corresponding path program 1 times [2022-01-10 14:31:04,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639041141] [2022-01-10 14:31:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:31:04,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639041141] [2022-01-10 14:31:04,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639041141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:04,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:04,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:31:04,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901096151] [2022-01-10 14:31:04,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:31:04,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:31:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:31:04,445 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 14:31:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,455 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-10 14:31:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:31:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-01-10 14:31:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,456 INFO L225 Difference]: With dead ends: 43 [2022-01-10 14:31:04,456 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 14:31:04,457 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 14:31:04,457 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 14:31:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 14:31:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 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 14:31:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-10 14:31:04,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2022-01-10 14:31:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-10 14:31:04,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 14:31:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-10 14:31:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 14:31:04,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 14:31:04,463 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash 715822373, now seen corresponding path program 1 times [2022-01-10 14:31:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783568416] [2022-01-10 14:31:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:04,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783568416] [2022-01-10 14:31:04,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783568416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:04,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:04,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 14:31:04,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311548835] [2022-01-10 14:31:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:04,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:04,506 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,534 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2022-01-10 14:31:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 14:31:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 14:31:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,535 INFO L225 Difference]: With dead ends: 45 [2022-01-10 14:31:04,535 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 14:31:04,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 14:31:04,536 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 14:31:04,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-01-10 14:31:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 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 14:31:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-01-10 14:31:04,539 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2022-01-10 14:31:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,540 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-01-10 14:31:04,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-01-10 14:31:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 14:31:04,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 14:31:04,541 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1096314565, now seen corresponding path program 1 times [2022-01-10 14:31:04,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606446154] [2022-01-10 14:31:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:04,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606446154] [2022-01-10 14:31:04,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606446154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:31:04,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:31:04,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 14:31:04,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870998147] [2022-01-10 14:31:04,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:04,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:04,573 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,609 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-10 14:31:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 14:31:04,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 14:31:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,610 INFO L225 Difference]: With dead ends: 39 [2022-01-10 14:31:04,610 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 14:31:04,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 14:31:04,611 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 14:31:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-10 14:31:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 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 14:31:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-01-10 14:31:04,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2022-01-10 14:31:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,615 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-01-10 14:31:04,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-01-10 14:31:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 14:31:04,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 14:31:04,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1103741742, now seen corresponding path program 1 times [2022-01-10 14:31:04,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:04,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399532441] [2022-01-10 14:31:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:04,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399532441] [2022-01-10 14:31:04,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399532441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786448320] [2022-01-10 14:31:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:04,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:04,650 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 14:31:04,651 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 14:31:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 14:31:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:04,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:04,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786448320] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:04,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 14:31:04,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2022-01-10 14:31:04,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160771802] [2022-01-10 14:31:04,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:31:04,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:04,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 14:31:04,787 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:04,804 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-01-10 14:31:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 14:31:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 14:31:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:04,804 INFO L225 Difference]: With dead ends: 36 [2022-01-10 14:31:04,805 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 14:31:04,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 14:31:04,805 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:04,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 14:31:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-10 14:31:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 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 14:31:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-01-10 14:31:04,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2022-01-10 14:31:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:04,809 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-01-10 14:31:04,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-01-10 14:31:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 14:31:04,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:04,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:04,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:05,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:05,024 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:05,024 INFO L85 PathProgramCache]: Analyzing trace with hash 939915598, now seen corresponding path program 1 times [2022-01-10 14:31:05,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:05,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225345059] [2022-01-10 14:31:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:05,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:05,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225345059] [2022-01-10 14:31:05,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225345059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:05,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314748976] [2022-01-10 14:31:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:05,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:05,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:05,099 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 14:31:05,115 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 14:31:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:05,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 14:31:05,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:05,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:05,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314748976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:05,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:05,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-10 14:31:05,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783198035] [2022-01-10 14:31:05,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:05,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:05,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:05,272 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:05,299 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-01-10 14:31:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 14:31:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 14:31:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:05,301 INFO L225 Difference]: With dead ends: 46 [2022-01-10 14:31:05,301 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 14:31:05,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:05,302 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:05,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 14:31:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2022-01-10 14:31:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 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 14:31:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-01-10 14:31:05,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 16 [2022-01-10 14:31:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-01-10 14:31:05,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:31:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-01-10 14:31:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 14:31:05,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:05,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:05,335 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 14:31:05,519 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,SelfDestructingSolverStorable7 [2022-01-10 14:31:05,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1561238400, now seen corresponding path program 1 times [2022-01-10 14:31:05,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:05,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373118136] [2022-01-10 14:31:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:05,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:05,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373118136] [2022-01-10 14:31:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373118136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123444069] [2022-01-10 14:31:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:05,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:05,589 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 14:31:05,590 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 14:31:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 14:31:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:05,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:05,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123444069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:05,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:05,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-10 14:31:05,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066471841] [2022-01-10 14:31:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:05,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:05,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:05,739 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:31:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:05,759 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-01-10 14:31:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 14:31:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-01-10 14:31:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:05,761 INFO L225 Difference]: With dead ends: 39 [2022-01-10 14:31:05,761 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 14:31:05,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:05,764 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:05,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 14:31:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-10 14:31:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 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 14:31:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-10 14:31:05,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2022-01-10 14:31:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:05,774 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-10 14:31:05,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:31:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-10 14:31:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 14:31:05,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:05,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:05,799 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 14:31:05,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:05,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1586173467, now seen corresponding path program 1 times [2022-01-10 14:31:05,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601412427] [2022-01-10 14:31:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:05,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:06,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601412427] [2022-01-10 14:31:06,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601412427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:06,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176801013] [2022-01-10 14:31:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:06,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:06,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:06,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 14:31:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 14:31:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:06,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176801013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:06,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-10 14:31:06,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769020913] [2022-01-10 14:31:06,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:06,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:31:06,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:31:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:06,199 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:31:06,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:06,237 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2022-01-10 14:31:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 14:31:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-01-10 14:31:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:06,238 INFO L225 Difference]: With dead ends: 51 [2022-01-10 14:31:06,238 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 14:31:06,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:31:06,238 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:06,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:31:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 14:31:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-01-10 14:31:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 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 14:31:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2022-01-10 14:31:06,242 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 17 [2022-01-10 14:31:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:06,242 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2022-01-10 14:31:06,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:31:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2022-01-10 14:31:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 14:31:06,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:06,243 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:06,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:06,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:06,459 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash 386514917, now seen corresponding path program 2 times [2022-01-10 14:31:06,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:06,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037570616] [2022-01-10 14:31:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:06,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:06,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037570616] [2022-01-10 14:31:06,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037570616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535398229] [2022-01-10 14:31:06,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:31:06,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:06,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:06,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 14:31:06,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:31:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:31:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 14:31:06,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:06,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:07,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535398229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:07,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:07,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 19 [2022-01-10 14:31:07,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651345143] [2022-01-10 14:31:07,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:07,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 14:31:07,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 14:31:07,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-10 14:31:07,469 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 14:31:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:10,932 INFO L93 Difference]: Finished difference Result 151 states and 217 transitions. [2022-01-10 14:31:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-10 14:31:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 17 [2022-01-10 14:31:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:10,933 INFO L225 Difference]: With dead ends: 151 [2022-01-10 14:31:10,933 INFO L226 Difference]: Without dead ends: 125 [2022-01-10 14:31:10,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2022-01-10 14:31:10,935 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 190 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:10,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 117 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 388 Invalid, 0 Unknown, 46 Unchecked, 1.1s Time] [2022-01-10 14:31:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-10 14:31:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 52. [2022-01-10 14:31:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 0 states have call successors, (0), 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 14:31:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2022-01-10 14:31:10,940 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 17 [2022-01-10 14:31:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:10,940 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2022-01-10 14:31:10,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 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 14:31:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2022-01-10 14:31:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 14:31:10,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:10,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:10,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:11,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 14:31:11,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1927600248, now seen corresponding path program 1 times [2022-01-10 14:31:11,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400884474] [2022-01-10 14:31:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:11,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:11,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:11,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400884474] [2022-01-10 14:31:11,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400884474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:11,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186834074] [2022-01-10 14:31:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:11,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:11,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:11,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:11,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 14:31:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 14:31:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:31:11,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:31:11,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186834074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:11,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:11,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 10 [2022-01-10 14:31:11,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921552516] [2022-01-10 14:31:11,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:11,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 14:31:11,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 14:31:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:31:11,554 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 14:31:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:11,616 INFO L93 Difference]: Finished difference Result 86 states and 121 transitions. [2022-01-10 14:31:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 14:31:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 18 [2022-01-10 14:31:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:11,617 INFO L225 Difference]: With dead ends: 86 [2022-01-10 14:31:11,617 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 14:31:11,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-10 14:31:11,617 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:11,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 59 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:31:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 14:31:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2022-01-10 14:31:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:31:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2022-01-10 14:31:11,622 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 18 [2022-01-10 14:31:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:11,622 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2022-01-10 14:31:11,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 14:31:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2022-01-10 14:31:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 14:31:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:11,623 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:11,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-10 14:31:11,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:11,832 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:11,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash 399915648, now seen corresponding path program 2 times [2022-01-10 14:31:11,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:11,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595961802] [2022-01-10 14:31:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:11,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:31:11,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595961802] [2022-01-10 14:31:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595961802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873646004] [2022-01-10 14:31:11,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:31:11,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:11,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:11,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 14:31:11,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:31:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:31:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 14:31:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:12,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:31:26,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873646004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:26,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:26,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 18 [2022-01-10 14:31:26,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751366451] [2022-01-10 14:31:26,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:26,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 14:31:26,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 14:31:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-10 14:31:26,565 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:31:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:30,091 INFO L93 Difference]: Finished difference Result 201 states and 316 transitions. [2022-01-10 14:31:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-10 14:31:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 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 19 [2022-01-10 14:31:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:30,092 INFO L225 Difference]: With dead ends: 201 [2022-01-10 14:31:30,092 INFO L226 Difference]: Without dead ends: 170 [2022-01-10 14:31:30,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=539, Invalid=2541, Unknown=0, NotChecked=0, Total=3080 [2022-01-10 14:31:30,094 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 185 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:30,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 88 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 188 Invalid, 0 Unknown, 27 Unchecked, 1.1s Time] [2022-01-10 14:31:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-10 14:31:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 105. [2022-01-10 14:31:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.5) internal successors, (156), 104 states have internal predecessors, (156), 0 states have call successors, (0), 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 14:31:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 156 transitions. [2022-01-10 14:31:30,101 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 156 transitions. Word has length 19 [2022-01-10 14:31:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:30,101 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 156 transitions. [2022-01-10 14:31:30,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:31:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 156 transitions. [2022-01-10 14:31:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 14:31:30,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:30,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:30,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:30,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:30,302 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:30,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 774705486, now seen corresponding path program 2 times [2022-01-10 14:31:30,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:30,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538641149] [2022-01-10 14:31:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:30,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 14:31:30,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538641149] [2022-01-10 14:31:30,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538641149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887829071] [2022-01-10 14:31:30,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:31:30,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:30,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:30,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 14:31:30,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:31:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:31:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-10 14:31:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 14:31:30,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 14:31:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887829071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:30,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:30,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 18 [2022-01-10 14:31:30,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250365961] [2022-01-10 14:31:30,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:30,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 14:31:30,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 14:31:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-10 14:31:30,751 INFO L87 Difference]: Start difference. First operand 105 states and 156 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 14:31:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:31,960 INFO L93 Difference]: Finished difference Result 283 states and 439 transitions. [2022-01-10 14:31:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-10 14:31:31,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 20 [2022-01-10 14:31:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:31,961 INFO L225 Difference]: With dead ends: 283 [2022-01-10 14:31:31,961 INFO L226 Difference]: Without dead ends: 194 [2022-01-10 14:31:31,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=2056, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 14:31:31,963 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 208 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:31,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 99 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 14:31:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-10 14:31:31,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 107. [2022-01-10 14:31:31,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.5849056603773586) internal successors, (168), 106 states have internal predecessors, (168), 0 states have call successors, (0), 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 14:31:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 168 transitions. [2022-01-10 14:31:31,971 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 168 transitions. Word has length 20 [2022-01-10 14:31:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:31,972 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 168 transitions. [2022-01-10 14:31:31,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 14:31:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 168 transitions. [2022-01-10 14:31:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 14:31:31,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:31,972 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:31,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 14:31:32,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 14:31:32,188 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:32,188 INFO L85 PathProgramCache]: Analyzing trace with hash -405732480, now seen corresponding path program 2 times [2022-01-10 14:31:32,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:32,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388250618] [2022-01-10 14:31:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:32,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 14:31:32,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388250618] [2022-01-10 14:31:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388250618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791488345] [2022-01-10 14:31:32,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:31:32,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:32,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:32,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 14:31:32,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:31:32,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:31:32,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 14:31:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:31:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 14:31:32,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:31:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 14:31:32,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791488345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:31:32,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:31:32,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-01-10 14:31:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569517979] [2022-01-10 14:31:32,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:31:32,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 14:31:32,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:31:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 14:31:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-10 14:31:32,530 INFO L87 Difference]: Start difference. First operand 107 states and 168 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 14:31:32,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:31:32,840 INFO L93 Difference]: Finished difference Result 157 states and 252 transitions. [2022-01-10 14:31:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 14:31:32,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 14:31:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:31:32,841 INFO L225 Difference]: With dead ends: 157 [2022-01-10 14:31:32,841 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 14:31:32,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-01-10 14:31:32,842 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:31:32,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 85 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:31:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 14:31:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 93. [2022-01-10 14:31:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5) internal successors, (138), 92 states have internal predecessors, (138), 0 states have call successors, (0), 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 14:31:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 138 transitions. [2022-01-10 14:31:32,867 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 138 transitions. Word has length 23 [2022-01-10 14:31:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:31:32,867 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 138 transitions. [2022-01-10 14:31:32,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 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 14:31:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 138 transitions. [2022-01-10 14:31:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 14:31:32,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:31:32,868 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:31:32,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-10 14:31:33,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-10 14:31:33,079 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:31:33,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:31:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash 616673093, now seen corresponding path program 3 times [2022-01-10 14:31:33,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:31:33,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124037753] [2022-01-10 14:31:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:31:33,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:31:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:31:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 14:31:33,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:31:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124037753] [2022-01-10 14:31:33,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124037753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:31:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084430102] [2022-01-10 14:31:33,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 14:31:33,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:31:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:31:33,154 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:31:33,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 14:31:33,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 14:31:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:31:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-10 14:31:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:32:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:32:06,014 INFO L328 TraceCheckSpWp]: Computing backward predicates...