/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:33:28,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:33:28,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:33:28,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:33:28,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:33:28,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:33:28,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:33:28,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:33:28,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:33:28,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:33:28,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:33:28,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:33:28,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:33:28,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:33:28,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:33:28,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:33:28,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:33:28,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:33:28,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:33:28,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:33:28,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:33:28,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:33:28,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:33:28,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:33:28,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:33:28,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:33:28,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:33:28,426 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:33:28,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:33:28,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:33:28,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:28,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:33:28,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:33:28,429 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:33:28,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:33:28,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:33:28,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:33:28,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:33:28,429 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:33:28,430 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:33:28,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:33:28,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:33:28,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:33:28,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:33:28,622 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:33:28,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2022-01-10 12:33:28,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22a08763/f57d7bc9c47e4ed79315d051a96f38cc/FLAGb0e1511ae [2022-01-10 12:33:29,017 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:33:29,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2022-01-10 12:33:29,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22a08763/f57d7bc9c47e4ed79315d051a96f38cc/FLAGb0e1511ae [2022-01-10 12:33:29,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f22a08763/f57d7bc9c47e4ed79315d051a96f38cc [2022-01-10 12:33:29,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:33:29,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:33:29,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:29,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:33:29,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:33:29,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af56b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29, skipping insertion in model container [2022-01-10 12:33:29,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:33:29,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:33:29,163 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c[454,467] [2022-01-10 12:33:29,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:29,187 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:33:29,200 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c[454,467] [2022-01-10 12:33:29,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:33:29,211 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:33:29,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29 WrapperNode [2022-01-10 12:33:29,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:33:29,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:29,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:33:29,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:33:29,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,229 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-10 12:33:29,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:33:29,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:33:29,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:33:29,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:33:29,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:33:29,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:33:29,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:33:29,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:33:29,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:33:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:29,263 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 12:33:29,264 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 12:33:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:33:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:33:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:33:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:33:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 12:33:29,286 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 12:33:29,328 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:33:29,329 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:33:29,390 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:33:29,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:33:29,394 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:33:29,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:29 BoogieIcfgContainer [2022-01-10 12:33:29,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:33:29,395 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:33:29,396 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:33:29,396 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:33:29,398 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:29" (1/1) ... [2022-01-10 12:33:29,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:29 BasicIcfg [2022-01-10 12:33:29,432 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:33:29,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:33:29,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:33:29,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:33:29,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:33:29" (1/4) ... [2022-01-10 12:33:29,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32382575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:29, skipping insertion in model container [2022-01-10 12:33:29,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:33:29" (2/4) ... [2022-01-10 12:33:29,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32382575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:33:29, skipping insertion in model container [2022-01-10 12:33:29,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:33:29" (3/4) ... [2022-01-10 12:33:29,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32382575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:33:29, skipping insertion in model container [2022-01-10 12:33:29,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:33:29" (4/4) ... [2022-01-10 12:33:29,436 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.cTransformedIcfg [2022-01-10 12:33:29,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:33:29,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:33:29,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:33:29,472 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 12:33:29,472 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:33:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 12:33:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:33:29,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:29,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:29,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:29,498 INFO L85 PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times [2022-01-10 12:33:29,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151236172] [2022-01-10 12:33:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:29,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,728 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 12:33:29,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151236172] [2022-01-10 12:33:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151236172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:33:29,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:33:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:33:29,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941392508] [2022-01-10 12:33:29,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:33:29,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:33:29,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:33:29,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:33:29,769 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:29,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:29,840 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 12:33:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:33:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 12:33:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:29,849 INFO L225 Difference]: With dead ends: 25 [2022-01-10 12:33:29,849 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 12:33:29,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:33:29,858 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:29,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 12:33:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 12:33:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:33:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 12:33:29,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 12:33:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:29,884 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 12:33:29,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:33:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 12:33:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 12:33:29,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:29,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:29,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:33:29,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times [2022-01-10 12:33:29,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580975035] [2022-01-10 12:33:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:29,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:33:30,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580975035] [2022-01-10 12:33:30,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580975035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:30,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312288156] [2022-01-10 12:33:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:30,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:30,056 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 12:33:30,057 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 12:33:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:33:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:33:30,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 12:33:30,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312288156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:30,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:30,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-10 12:33:30,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397170564] [2022-01-10 12:33:30,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:30,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 12:33:30,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 12:33:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:33:30,498 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 12:33:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:30,563 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 12:33:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 12:33:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2022-01-10 12:33:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:30,569 INFO L225 Difference]: With dead ends: 22 [2022-01-10 12:33:30,569 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 12:33:30,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-10 12:33:30,571 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:30,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 12:33:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 12:33:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 12:33:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 12:33:30,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 12:33:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 12:33:30,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 12:33:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 12:33:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:33:30,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:30,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:30,603 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 12:33:30,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:30,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times [2022-01-10 12:33:30,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:30,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328883685] [2022-01-10 12:33:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:30,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:33:30,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328883685] [2022-01-10 12:33:30,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328883685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564228000] [2022-01-10 12:33:30,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:33:30,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:30,995 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 12:33:30,996 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 12:33:31,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:33:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:31,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:33:31,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 12:33:31,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:33:31,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564228000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:31,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:31,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-01-10 12:33:31,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77706458] [2022-01-10 12:33:31,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 12:33:31,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 12:33:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-10 12:33:31,598 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 12:33:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:31,727 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 12:33:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:33:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-10 12:33:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:31,728 INFO L225 Difference]: With dead ends: 25 [2022-01-10 12:33:31,728 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 12:33:31,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-10 12:33:31,732 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:31,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 12:33:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 12:33:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 12:33:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 12:33:31,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 12:33:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:31,740 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 12:33:31,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 12:33:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 12:33:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 12:33:31,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:31,742 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:31,777 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 12:33:31,947 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,SelfDestructingSolverStorable2 [2022-01-10 12:33:31,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times [2022-01-10 12:33:31,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737588523] [2022-01-10 12:33:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:31,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:31,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:32,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:32,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:32,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 12:33:32,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:32,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737588523] [2022-01-10 12:33:32,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737588523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:32,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789483933] [2022-01-10 12:33:32,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:33:32,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:32,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:32,113 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 12:33:32,114 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 12:33:32,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 12:33:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:33:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 12:33:32,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 12:33:32,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789483933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:32,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:32,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-01-10 12:33:32,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466918176] [2022-01-10 12:33:32,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 12:33:32,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 12:33:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-10 12:33:32,883 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 12:33:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:32,988 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-10 12:33:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:33:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 28 [2022-01-10 12:33:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:32,990 INFO L225 Difference]: With dead ends: 28 [2022-01-10 12:33:32,990 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 12:33:32,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-10 12:33:32,991 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:32,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 88 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:33:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 12:33:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 12:33:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 12:33:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-10 12:33:32,994 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-10 12:33:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:32,994 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-10 12:33:32,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-10 12:33:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-10 12:33:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 12:33:32,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:32,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:33,014 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 12:33:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:33,203 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash -41530752, now seen corresponding path program 4 times [2022-01-10 12:33:33,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:33,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561263151] [2022-01-10 12:33:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:33,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:33,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:33,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:33,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 12:33:33,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561263151] [2022-01-10 12:33:33,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561263151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034189231] [2022-01-10 12:33:33,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:33:33,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:33,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:33,400 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 12:33:33,401 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 12:33:33,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:33:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:33,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 12:33:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 12:33:33,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 12:33:34,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034189231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:34,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:34,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 22 [2022-01-10 12:33:34,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228778973] [2022-01-10 12:33:34,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:34,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 12:33:34,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 12:33:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-10 12:33:34,467 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 12:33:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:34,659 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-10 12:33:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:33:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 34 [2022-01-10 12:33:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:34,660 INFO L225 Difference]: With dead ends: 31 [2022-01-10 12:33:34,660 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 12:33:34,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-10 12:33:34,661 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:34,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 12:33:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 12:33:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 12:33:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-10 12:33:34,664 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-10 12:33:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:34,665 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-10 12:33:34,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 12:33:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-10 12:33:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 12:33:34,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:34,666 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:34,684 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 12:33:34,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:34,867 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash -10048123, now seen corresponding path program 5 times [2022-01-10 12:33:34,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:34,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408315117] [2022-01-10 12:33:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:34,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:34,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:34,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:34,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:34,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:35,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 12:33:35,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:35,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408315117] [2022-01-10 12:33:35,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408315117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:35,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801404567] [2022-01-10 12:33:35,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 12:33:35,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:35,043 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 12:33:35,082 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 12:33:35,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 12:33:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 12:33:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 12:33:35,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 12:33:36,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801404567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:36,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:36,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 25 [2022-01-10 12:33:36,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303608400] [2022-01-10 12:33:36,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:36,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 12:33:36,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 12:33:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-10 12:33:36,572 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 12:33:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:36,863 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-10 12:33:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 12:33:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 40 [2022-01-10 12:33:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:36,864 INFO L225 Difference]: With dead ends: 34 [2022-01-10 12:33:36,864 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 12:33:36,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-01-10 12:33:36,865 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:36,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 181 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 12:33:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 12:33:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 12:33:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-10 12:33:36,868 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-10 12:33:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:36,869 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-10 12:33:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 12:33:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-10 12:33:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 12:33:36,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:36,870 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:36,891 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 12:33:37,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:37,079 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1028064608, now seen corresponding path program 6 times [2022-01-10 12:33:37,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535956200] [2022-01-10 12:33:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:37,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 12:33:37,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535956200] [2022-01-10 12:33:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535956200] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571743276] [2022-01-10 12:33:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 12:33:37,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:37,329 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 12:33:37,330 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 12:33:37,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 12:33:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:37,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 12:33:37,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 12:33:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 12:33:38,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571743276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:38,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:38,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 28 [2022-01-10 12:33:38,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014307568] [2022-01-10 12:33:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:38,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 12:33:38,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 12:33:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-10 12:33:38,879 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-10 12:33:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:39,103 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-10 12:33:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 12:33:39,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) Word has length 46 [2022-01-10 12:33:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:39,105 INFO L225 Difference]: With dead ends: 37 [2022-01-10 12:33:39,105 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 12:33:39,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 12:33:39,106 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:39,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 187 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:33:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 12:33:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 12:33:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 12:33:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-10 12:33:39,109 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-10 12:33:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:39,109 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-10 12:33:39,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-10 12:33:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-10 12:33:39,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 12:33:39,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:39,110 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:39,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 12:33:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:39,317 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1798148635, now seen corresponding path program 7 times [2022-01-10 12:33:39,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511177930] [2022-01-10 12:33:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:39,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 12:33:39,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511177930] [2022-01-10 12:33:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511177930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:39,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778532844] [2022-01-10 12:33:39,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 12:33:39,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:39,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:33:39,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 12:33:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-10 12:33:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:33:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 17 proven. 87 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 12:33:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:33:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 12:33:47,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778532844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:33:47,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:33:47,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 19] total 35 [2022-01-10 12:33:47,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732031153] [2022-01-10 12:33:47,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:33:47,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 12:33:47,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:33:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 12:33:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 12:33:47,046 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-10 12:33:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:33:47,538 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-10 12:33:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 12:33:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) Word has length 52 [2022-01-10 12:33:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:33:47,539 INFO L225 Difference]: With dead ends: 40 [2022-01-10 12:33:47,539 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 12:33:47,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 12:33:47,540 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:33:47,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 263 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 12:33:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 12:33:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 12:33:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 12:33:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-10 12:33:47,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-10 12:33:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:33:47,544 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-10 12:33:47,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-10 12:33:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-10 12:33:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 12:33:47,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:33:47,545 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:33:47,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-10 12:33:47,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:47,760 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:33:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:33:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash 718365376, now seen corresponding path program 8 times [2022-01-10 12:33:47,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:33:47,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488171997] [2022-01-10 12:33:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:33:47,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:33:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:47,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:47,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:47,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:48,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:48,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:33:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:33:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-10 12:33:48,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:33:48,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488171997] [2022-01-10 12:33:48,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488171997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:33:48,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856335783] [2022-01-10 12:33:48,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:33:48,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:33:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:33:48,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:33:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 12:33:48,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:33:48,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:33:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-10 12:33:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates...