/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:21:22,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:21:22,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:21:22,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 20:21:22,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:21:22,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:21:22,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:21:22,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:21:22,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:21:22,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:21:22,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:21:22,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:21:22,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:21:22,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:21:22,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:21:22,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:21:22,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:21:22,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:21:22,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:21:22,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:21:22,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:21:22,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:21:22,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:21:22,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:21:22,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:21:22,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:21:22,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:21:22,253 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:21:22,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:21:22,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:21:22,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:21:22,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:21:22,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:21:22,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:21:22,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:21:22,255 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:21:22,255 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:21:22,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:21:22,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:21:22,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:21:22,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:21:22,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:21:22,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:21:22,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:21:22,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:21:22,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:21:22,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:21:22,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:21:22,257 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:21:22,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:21:22,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:21:22,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:21:22,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:21:22,258 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:21:22,258 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:21:22,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:21:22,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:21:22,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:21:22,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:21:22,509 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:21:22,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-01-10 20:21:22,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1267d845a/fb1c2c534c634f5396ca33ccd592e4f1/FLAG2f4d01abc [2022-01-10 20:21:22,916 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:21:22,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-01-10 20:21:22,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1267d845a/fb1c2c534c634f5396ca33ccd592e4f1/FLAG2f4d01abc [2022-01-10 20:21:22,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1267d845a/fb1c2c534c634f5396ca33ccd592e4f1 [2022-01-10 20:21:22,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:21:22,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:21:22,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:21:22,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:21:22,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:21:22,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:21:22" (1/1) ... [2022-01-10 20:21:22,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c323430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:22, skipping insertion in model container [2022-01-10 20:21:22,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:21:22" (1/1) ... [2022-01-10 20:21:22,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:21:22,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:21:23,077 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/mono-crafted_1.c[318,331] [2022-01-10 20:21:23,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:21:23,092 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:21:23,100 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/mono-crafted_1.c[318,331] [2022-01-10 20:21:23,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:21:23,113 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:21:23,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23 WrapperNode [2022-01-10 20:21:23,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:21:23,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:21:23,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:21:23,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:21:23,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,151 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-01-10 20:21:23,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:21:23,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:21:23,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:21:23,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:21:23,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:21:23,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:21:23,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:21:23,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:21:23,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:21:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:23,206 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 20:21:23,207 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 20:21:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:21:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:21:23,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:21:23,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:21:23,275 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:21:23,276 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:21:23,358 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:21:23,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:21:23,363 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 20:21:23,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:23 BoogieIcfgContainer [2022-01-10 20:21:23,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:21:23,365 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:21:23,365 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:21:23,366 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:21:23,368 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:23" (1/1) ... [2022-01-10 20:21:23,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:21:23 BasicIcfg [2022-01-10 20:21:23,409 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:21:23,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:21:23,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:21:23,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:21:23,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:21:22" (1/4) ... [2022-01-10 20:21:23,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec9130d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:21:23, skipping insertion in model container [2022-01-10 20:21:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:21:23" (2/4) ... [2022-01-10 20:21:23,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec9130d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:21:23, skipping insertion in model container [2022-01-10 20:21:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:21:23" (3/4) ... [2022-01-10 20:21:23,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec9130d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:21:23, skipping insertion in model container [2022-01-10 20:21:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:21:23" (4/4) ... [2022-01-10 20:21:23,415 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.cTransformedIcfg [2022-01-10 20:21:23,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:21:23,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:21:23,471 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:21:23,479 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 20:21:23,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:21:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) 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 20:21:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 20:21:23,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:23,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:23,496 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1009780789, now seen corresponding path program 1 times [2022-01-10 20:21:23,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:23,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497976122] [2022-01-10 20:21:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:23,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:23,666 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 20:21:23,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497976122] [2022-01-10 20:21:23,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497976122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:23,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:23,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:21:23,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797086075] [2022-01-10 20:21:23,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:23,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:21:23,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:21:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:21:23,703 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 20:21:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:23,720 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-01-10 20:21:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:21:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-01-10 20:21:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:23,728 INFO L225 Difference]: With dead ends: 22 [2022-01-10 20:21:23,729 INFO L226 Difference]: Without dead ends: 9 [2022-01-10 20:21:23,732 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 20:21:23,736 INFO L933 BasicCegarLoop]: 15 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, 15 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 20:21:23,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-10 20:21:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-10 20:21:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states 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 20:21:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-01-10 20:21:23,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-01-10 20:21:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:23,765 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-01-10 20:21:23,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 20:21:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-01-10 20:21:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 20:21:23,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:23,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:23,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:21:23,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1010734101, now seen corresponding path program 1 times [2022-01-10 20:21:23,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:23,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992999465] [2022-01-10 20:21:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:23,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:23,943 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 20:21:23,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992999465] [2022-01-10 20:21:23,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992999465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:21:23,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:21:23,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 20:21:23,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211284841] [2022-01-10 20:21:23,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:21:23,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 20:21:23,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 20:21:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 20:21:23,946 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 20:21:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:23,993 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-01-10 20:21:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:21:23,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-01-10 20:21:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:23,994 INFO L225 Difference]: With dead ends: 18 [2022-01-10 20:21:23,994 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 20:21:23,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 20:21:23,995 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:23,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:21:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 20:21:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 20:21:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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 20:21:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-01-10 20:21:23,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-01-10 20:21:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:23,999 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-01-10 20:21:23,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 20:21:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-01-10 20:21:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 20:21:24,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:24,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:24,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 20:21:24,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1591009489, now seen corresponding path program 1 times [2022-01-10 20:21:24,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:24,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151745456] [2022-01-10 20:21:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:24,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:21:24,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151745456] [2022-01-10 20:21:24,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151745456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311823274] [2022-01-10 20:21:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:24,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:24,085 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 20:21:24,086 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 20:21:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 20:21:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:21:24,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:21:24,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311823274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:24,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:24,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 20:21:24,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177654552] [2022-01-10 20:21:24,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:24,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 20:21:24,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:24,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 20:21:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:21:24,459 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 20:21:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:24,643 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-01-10 20:21:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:21:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 9 [2022-01-10 20:21:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:24,646 INFO L225 Difference]: With dead ends: 23 [2022-01-10 20:21:24,646 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 20:21:24,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-10 20:21:24,648 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:24,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 20:21:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 20:21:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 20:21:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 20:21:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-10 20:21:24,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-01-10 20:21:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:24,654 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-10 20:21:24,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 20:21:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-10 20:21:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 20:21:24,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:24,655 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:24,685 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 20:21:24,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:24,866 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1280004739, now seen corresponding path program 1 times [2022-01-10 20:21:24,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:24,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928172116] [2022-01-10 20:21:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:24,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:25,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928172116] [2022-01-10 20:21:25,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928172116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:25,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507218948] [2022-01-10 20:21:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:25,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:25,023 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 20:21:25,024 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 20:21:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:21:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:25,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:21:25,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507218948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:25,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:25,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-10 20:21:25,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302799166] [2022-01-10 20:21:25,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:25,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 20:21:25,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 20:21:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-10 20:21:25,475 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 20:21:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:26,113 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-01-10 20:21:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 20:21:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 20:21:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:26,115 INFO L225 Difference]: With dead ends: 34 [2022-01-10 20:21:26,116 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 20:21:26,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:21:26,117 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:26,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 20:21:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 20:21:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 20:21:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 20:21:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-10 20:21:26,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-01-10 20:21:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:26,129 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-10 20:21:26,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states 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 20:21:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-10 20:21:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 20:21:26,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:26,131 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:26,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:21:26,347 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,SelfDestructingSolverStorable3 [2022-01-10 20:21:26,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1286740851, now seen corresponding path program 2 times [2022-01-10 20:21:26,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:26,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999451653] [2022-01-10 20:21:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:26,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:21:26,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999451653] [2022-01-10 20:21:26,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999451653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:26,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386447788] [2022-01-10 20:21:26,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:21:26,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:26,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:26,605 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 20:21:26,606 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 20:21:26,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:21:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:26,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 20:21:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 20:21:27,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 20:21:34,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386447788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:34,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:34,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-01-10 20:21:34,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284946288] [2022-01-10 20:21:34,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:34,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 20:21:34,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 20:21:34,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=86, Unknown=2, NotChecked=0, Total=132 [2022-01-10 20:21:34,218 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 20:21:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:37,886 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-01-10 20:21:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 20:21:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) Word has length 23 [2022-01-10 20:21:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:37,889 INFO L225 Difference]: With dead ends: 57 [2022-01-10 20:21:37,890 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 20:21:37,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=72, Invalid=136, Unknown=2, NotChecked=0, Total=210 [2022-01-10 20:21:37,891 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:37,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 59 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-01-10 20:21:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 20:21:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2022-01-10 20:21:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 20:21:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-10 20:21:37,902 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 23 [2022-01-10 20:21:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:37,902 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-10 20:21:37,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 20:21:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-10 20:21:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 20:21:37,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:37,904 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:37,914 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 20:21:38,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:38,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1235064110, now seen corresponding path program 1 times [2022-01-10 20:21:38,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:38,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11631690] [2022-01-10 20:21:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:38,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:21:38,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11631690] [2022-01-10 20:21:38,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11631690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:38,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285599253] [2022-01-10 20:21:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:38,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:38,275 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 20:21:38,276 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 20:21:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 20:21:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:21:43,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:21:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:21:46,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285599253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:21:46,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:21:46,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-10 20:21:46,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985498616] [2022-01-10 20:21:46,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:21:46,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 20:21:46,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:21:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 20:21:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=104, Unknown=1, NotChecked=0, Total=156 [2022-01-10 20:21:46,504 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 20:21:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:21:48,994 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2022-01-10 20:21:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 20:21:48,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2022-01-10 20:21:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:21:48,996 INFO L225 Difference]: With dead ends: 54 [2022-01-10 20:21:48,996 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 20:21:48,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=60, Invalid=121, Unknown=1, NotChecked=0, Total=182 [2022-01-10 20:21:48,997 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:21:48,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-10 20:21:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 20:21:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-01-10 20:21:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 20:21:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-01-10 20:21:49,009 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 24 [2022-01-10 20:21:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:21:49,009 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-01-10 20:21:49,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 20:21:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-01-10 20:21:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 20:21:49,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:21:49,010 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:21:49,017 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 20:21:49,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:49,215 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:21:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:21:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1511344590, now seen corresponding path program 2 times [2022-01-10 20:21:49,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:21:49,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579872183] [2022-01-10 20:21:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:21:49,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:21:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:21:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:49,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:21:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579872183] [2022-01-10 20:21:49,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579872183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:21:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60979405] [2022-01-10 20:21:49,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:21:49,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:21:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:21:49,344 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 20:21:49,370 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 20:21:49,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:21:49,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:21:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 20:21:49,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:21:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 20:21:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:22:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 20:22:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60979405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:22:04,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:22:04,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-10 20:22:04,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179211745] [2022-01-10 20:22:04,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:22:04,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 20:22:04,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:22:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 20:22:04,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-01-10 20:22:04,801 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 20:22:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:22:24,830 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2022-01-10 20:22:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 20:22:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 26 [2022-01-10 20:22:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:22:24,833 INFO L225 Difference]: With dead ends: 94 [2022-01-10 20:22:24,833 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 20:22:24,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2022-01-10 20:22:24,835 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 20:22:24,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 20:22:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 20:22:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2022-01-10 20:22:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 20:22:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-01-10 20:22:24,858 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 26 [2022-01-10 20:22:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:22:24,858 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-01-10 20:22:24,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states 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 20:22:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-01-10 20:22:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 20:22:24,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:24,859 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:24,876 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 20:22:25,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:22:25,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1548073467, now seen corresponding path program 3 times [2022-01-10 20:22:25,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:25,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852008216] [2022-01-10 20:22:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:25,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 20:22:25,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852008216] [2022-01-10 20:22:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852008216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:22:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350051787] [2022-01-10 20:22:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:22:25,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:22:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:22:25,216 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 20:22:25,217 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 20:22:25,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 20:22:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:22:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 20:22:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:22:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:22:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates...