/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/loop-simple/nested_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:34:26,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:34:26,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:34:26,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 14:34:26,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:34:26,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:34:26,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:34:26,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:34:26,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:34:26,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:34:26,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:34:26,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:34:26,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:34:26,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:34:26,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:34:26,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:34:26,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 14:34:26,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 14:34:26,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 14:34:26,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 14:34:26,199 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 14:34:26,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:34:26,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:34:26,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:34:26,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:34:26,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:34:26,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:34:26,225 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:34:26,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:34:26,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:34:26,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:34:26,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:34:26,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:34:26,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:34:26,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:34:26,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:34:26,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:34:26,229 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:34:26,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:34:26,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:34:26,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:34:26,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:34:26,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:34:26,426 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:34:26,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_3.c [2022-01-10 14:34:26,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02baf4b08/eda30504c31c45ef89957dcd31527de8/FLAGffc7d7144 [2022-01-10 14:34:26,749 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:34:26,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c [2022-01-10 14:34:26,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02baf4b08/eda30504c31c45ef89957dcd31527de8/FLAGffc7d7144 [2022-01-10 14:34:27,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02baf4b08/eda30504c31c45ef89957dcd31527de8 [2022-01-10 14:34:27,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:34:27,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:34:27,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:34:27,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:34:27,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:34:27,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30836ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27, skipping insertion in model container [2022-01-10 14:34:27,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:34:27,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:34:27,292 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c[784,797] [2022-01-10 14:34:27,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:34:27,312 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:34:27,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_3.c[784,797] [2022-01-10 14:34:27,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:34:27,329 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:34:27,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27 WrapperNode [2022-01-10 14:34:27,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:34:27,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:34:27,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:34:27,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:34:27,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,351 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-01-10 14:34:27,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:34:27,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:34:27,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:34:27,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:34:27,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:34:27,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:34:27,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:34:27,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:34:27,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:34:27,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:27,405 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 14:34:27,413 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 14:34:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:34:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:34:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:34:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:34:27,478 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:34:27,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:34:27,588 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:34:27,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:34:27,591 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 14:34:27,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:34:27 BoogieIcfgContainer [2022-01-10 14:34:27,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:34:27,593 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:34:27,593 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:34:27,595 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:34:27,597 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:34:27" (1/1) ... [2022-01-10 14:34:27,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:34:27 BasicIcfg [2022-01-10 14:34:27,666 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:34:27,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:34:27,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:34:27,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:34:27,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:34:27" (1/4) ... [2022-01-10 14:34:27,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e2aff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:34:27, skipping insertion in model container [2022-01-10 14:34:27,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:27" (2/4) ... [2022-01-10 14:34:27,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e2aff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:34:27, skipping insertion in model container [2022-01-10 14:34:27,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:34:27" (3/4) ... [2022-01-10 14:34:27,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e2aff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:34:27, skipping insertion in model container [2022-01-10 14:34:27,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:34:27" (4/4) ... [2022-01-10 14:34:27,671 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.cTransformedIcfg [2022-01-10 14:34:27,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:34:27,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 14:34:27,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:34:27,719 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 14:34:27,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 14:34:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 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 14:34:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-10 14:34:27,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:27,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-10 14:34:27,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash 78284889, now seen corresponding path program 1 times [2022-01-10 14:34:27,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:27,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327647397] [2022-01-10 14:34:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:27,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:27,826 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 14:34:27,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:27,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327647397] [2022-01-10 14:34:27,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327647397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:27,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:27,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 14:34:27,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254385992] [2022-01-10 14:34:27,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:27,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 14:34:27,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 14:34:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 14:34:27,849 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 14:34:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:27,857 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-01-10 14:34:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 14:34:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-01-10 14:34:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:27,863 INFO L225 Difference]: With dead ends: 28 [2022-01-10 14:34:27,863 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 14:34:27,865 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 14:34:27,867 INFO L933 BasicCegarLoop]: 17 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, 17 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 14:34:27,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 14:34:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 14:34:27,884 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 14:34:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-01-10 14:34:27,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2022-01-10 14:34:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:27,885 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-01-10 14:34:27,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 14:34:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-01-10 14:34:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-10 14:34:27,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:27,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-10 14:34:27,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:34:27,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 78285850, now seen corresponding path program 1 times [2022-01-10 14:34:27,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:27,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434664150] [2022-01-10 14:34:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:27,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:27,972 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 14:34:27,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:27,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434664150] [2022-01-10 14:34:27,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434664150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:27,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:27,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:27,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186851733] [2022-01-10 14:34:27,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:27,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:27,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:27,975 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 14:34:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:27,991 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-01-10 14:34:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:27,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-01-10 14:34:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:27,992 INFO L225 Difference]: With dead ends: 20 [2022-01-10 14:34:27,992 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 14:34:27,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 14:34:27,994 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:27,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 14:34:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2022-01-10 14:34:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 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 14:34:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-01-10 14:34:27,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2022-01-10 14:34:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:27,997 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-01-10 14:34:27,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 14:34:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-01-10 14:34:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 14:34:27,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:27,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:27,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 14:34:27,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash 78059393, now seen corresponding path program 1 times [2022-01-10 14:34:27,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355337895] [2022-01-10 14:34:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:27,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:28,062 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 14:34:28,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:28,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355337895] [2022-01-10 14:34:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355337895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:28,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:28,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:28,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488469480] [2022-01-10 14:34:28,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:28,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:28,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:28,064 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 14:34:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:28,074 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-01-10 14:34:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-01-10 14:34:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:28,074 INFO L225 Difference]: With dead ends: 25 [2022-01-10 14:34:28,074 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 14:34:28,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 14:34:28,076 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:28,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 14:34:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2022-01-10 14:34:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 14:34:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-01-10 14:34:28,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-01-10 14:34:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:28,079 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-01-10 14:34:28,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 14:34:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-01-10 14:34:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 14:34:28,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:28,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:28,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:34:28,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1545272013, now seen corresponding path program 1 times [2022-01-10 14:34:28,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11174318] [2022-01-10 14:34:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:28,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:28,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11174318] [2022-01-10 14:34:28,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11174318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:28,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:28,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:28,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994056184] [2022-01-10 14:34:28,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:28,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:28,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:28,127 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 14:34:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:28,135 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-01-10 14:34:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 11 [2022-01-10 14:34:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:28,136 INFO L225 Difference]: With dead ends: 25 [2022-01-10 14:34:28,136 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 14:34:28,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 14:34:28,138 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:28,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 14:34:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-01-10 14:34:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 14:34:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-10 14:34:28,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2022-01-10 14:34:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:28,141 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-10 14:34:28,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 14:34:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-10 14:34:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 14:34:28,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:28,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:28,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 14:34:28,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash 948631210, now seen corresponding path program 1 times [2022-01-10 14:34:28,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:28,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478568205] [2022-01-10 14:34:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:28,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:28,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478568205] [2022-01-10 14:34:28,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478568205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900673170] [2022-01-10 14:34:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:28,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:28,185 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 14:34:28,186 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 14:34:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 14:34:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:28,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900673170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:28,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:28,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-01-10 14:34:28,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571093372] [2022-01-10 14:34:28,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:28,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 14:34:28,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:28,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 14:34:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 14:34:28,574 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 14:34:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:28,730 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-01-10 14:34:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 14:34:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 14:34:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:28,731 INFO L225 Difference]: With dead ends: 44 [2022-01-10 14:34:28,731 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 14:34:28,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-10 14:34:28,732 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:34:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 14:34:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2022-01-10 14:34:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:34:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-10 14:34:28,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-10 14:34:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:28,736 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-10 14:34:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 14:34:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-10 14:34:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 14:34:28,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:28,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:28,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 14:34:28,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:28,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1759963455, now seen corresponding path program 2 times [2022-01-10 14:34:28,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:28,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971479205] [2022-01-10 14:34:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:28,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 14:34:29,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:29,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971479205] [2022-01-10 14:34:29,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971479205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:29,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953762139] [2022-01-10 14:34:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:34:29,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:29,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:29,032 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 14:34:29,033 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 14:34:29,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:34:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:34:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 14:34:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:34:29,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:34:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953762139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:29,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:29,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-01-10 14:34:29,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065450226] [2022-01-10 14:34:29,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:29,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 14:34:29,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 14:34:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-01-10 14:34:29,409 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 14:34:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:29,613 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-01-10 14:34:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 14:34:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) Word has length 19 [2022-01-10 14:34:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:29,614 INFO L225 Difference]: With dead ends: 70 [2022-01-10 14:34:29,614 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 14:34:29,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:34:29,615 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:29,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 32 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:34:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 14:34:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-01-10 14:34:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 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 14:34:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-01-10 14:34:29,624 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 19 [2022-01-10 14:34:29,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:29,625 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-01-10 14:34:29,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 14:34:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-01-10 14:34:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 14:34:29,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:29,626 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:29,647 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 14:34:29,843 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,SelfDestructingSolverStorable5 [2022-01-10 14:34:29,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:29,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2078607233, now seen corresponding path program 3 times [2022-01-10 14:34:29,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:29,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831516641] [2022-01-10 14:34:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:29,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-01-10 14:34:29,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831516641] [2022-01-10 14:34:29,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831516641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419323163] [2022-01-10 14:34:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 14:34:29,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:29,932 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 14:34:29,933 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 14:34:29,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 14:34:29,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:34:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 14:34:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-01-10 14:34:30,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-01-10 14:34:30,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419323163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:30,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:30,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 14:34:30,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874468657] [2022-01-10 14:34:30,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:30,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 14:34:30,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 14:34:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 14:34:30,351 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 14:34:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:30,420 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2022-01-10 14:34:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 14:34:30,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 52 [2022-01-10 14:34:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:30,422 INFO L225 Difference]: With dead ends: 197 [2022-01-10 14:34:30,422 INFO L226 Difference]: Without dead ends: 194 [2022-01-10 14:34:30,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 14:34:30,422 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:30,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 49 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-10 14:34:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-01-10 14:34:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.1088082901554404) internal successors, (214), 193 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2022-01-10 14:34:30,455 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 52 [2022-01-10 14:34:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:30,455 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2022-01-10 14:34:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 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 14:34:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2022-01-10 14:34:30,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-10 14:34:30,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:30,458 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 14:34:30,476 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 14:34:30,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:30,677 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:30,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1497257562, now seen corresponding path program 4 times [2022-01-10 14:34:30,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:30,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174528597] [2022-01-10 14:34:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:30,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5502 backedges. 638 proven. 16 refuted. 0 times theorem prover too weak. 4848 trivial. 0 not checked. [2022-01-10 14:34:31,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174528597] [2022-01-10 14:34:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174528597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851733340] [2022-01-10 14:34:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 14:34:31,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:31,044 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 14:34:31,045 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 14:34:31,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 14:34:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:34:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-10 14:34:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5502 backedges. 638 proven. 16 refuted. 0 times theorem prover too weak. 4848 trivial. 0 not checked. [2022-01-10 14:34:32,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5502 backedges. 638 proven. 16 refuted. 0 times theorem prover too weak. 4848 trivial. 0 not checked. [2022-01-10 14:34:32,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851733340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:32,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:32,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 18 [2022-01-10 14:34:32,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300818740] [2022-01-10 14:34:32,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:32,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 14:34:32,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 14:34:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-10 14:34:32,568 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 14:34:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:33,135 INFO L93 Difference]: Finished difference Result 439 states and 510 transitions. [2022-01-10 14:34:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 14:34:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) Word has length 193 [2022-01-10 14:34:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:33,138 INFO L225 Difference]: With dead ends: 439 [2022-01-10 14:34:33,138 INFO L226 Difference]: Without dead ends: 258 [2022-01-10 14:34:33,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-01-10 14:34:33,140 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:33,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 58 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 100 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-01-10 14:34:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-10 14:34:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-01-10 14:34:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0817120622568093) internal successors, (278), 257 states have internal predecessors, (278), 0 states have call successors, (0), 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 14:34:33,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 278 transitions. [2022-01-10 14:34:33,193 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 278 transitions. Word has length 193 [2022-01-10 14:34:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:33,194 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 278 transitions. [2022-01-10 14:34:33,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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 14:34:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 278 transitions. [2022-01-10 14:34:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-10 14:34:33,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:33,203 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 14:34:33,223 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 14:34:33,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:33,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 906613338, now seen corresponding path program 5 times [2022-01-10 14:34:33,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:33,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391075346] [2022-01-10 14:34:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:33,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 4207 proven. 526 refuted. 0 times theorem prover too weak. 6369 trivial. 0 not checked. [2022-01-10 14:34:33,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:33,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391075346] [2022-01-10 14:34:33,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391075346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824679712] [2022-01-10 14:34:33,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 14:34:33,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:33,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:33,872 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 14:34:33,901 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 14:34:40,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-01-10 14:34:40,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:34:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-10 14:34:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:35:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7014 proven. 561 refuted. 1 times theorem prover too weak. 3526 trivial. 0 not checked. [2022-01-10 14:35:38,492 INFO L328 TraceCheckSpWp]: Computing backward predicates...