/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_SUM.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:58:08,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:58:08,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:58:08,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 05:58:08,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:58:08,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:58:08,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:58:08,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:58:08,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:58:08,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:58:08,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:58:08,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:58:08,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:58:08,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:58:08,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:58:08,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:58:08,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 05:58:08,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:58:08,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:58:08,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:58:08,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:58:08,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:58:08,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:58:08,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:58:08,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:58:08,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:58:08,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:58:08,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:58:08,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:58:08,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:58:08,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:58:08,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:58:08,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:58:08,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:58:08,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:58:08,540 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:58:08,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:58:08,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:58:08,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:58:08,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:58:08,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:58:08,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:58:08,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:58:08,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:58:08,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:58:08,543 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:58:08,543 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:58:08,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:58:08,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:58:08,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:58:08,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:58:08,740 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:58:08,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2022-01-11 05:58:08,779 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8def52d19/b4db75429b5342c4af1ccf6e6b156bfa/FLAG97aaed920 [2022-01-11 05:58:09,126 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:58:09,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2022-01-11 05:58:09,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8def52d19/b4db75429b5342c4af1ccf6e6b156bfa/FLAG97aaed920 [2022-01-11 05:58:09,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8def52d19/b4db75429b5342c4af1ccf6e6b156bfa [2022-01-11 05:58:09,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:58:09,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:58:09,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:58:09,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:58:09,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:58:09,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c78426e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09, skipping insertion in model container [2022-01-11 05:58:09,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:58:09,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:58:09,314 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/MultCommutative-2.c[970,983] [2022-01-11 05:58:09,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:58:09,322 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:58:09,334 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/MultCommutative-2.c[970,983] [2022-01-11 05:58:09,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:58:09,342 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:58:09,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09 WrapperNode [2022-01-11 05:58:09,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:58:09,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:58:09,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:58:09,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:58:09,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,364 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-01-11 05:58:09,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:58:09,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:58:09,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:58:09,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:58:09,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:58:09,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:58:09,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:58:09,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:58:09,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:58:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:09,411 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) [2022-01-11 05:58:09,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:58:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-01-11 05:58:09,437 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-01-11 05:58:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:58:09,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:58:09,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:58:09,426 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 [2022-01-11 05:58:09,478 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:58:09,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:58:09,578 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:58:09,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:58:09,582 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:58:09,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:58:09 BoogieIcfgContainer [2022-01-11 05:58:09,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:58:09,584 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:58:09,584 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:58:09,587 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:58:09,589 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:58:09" (1/1) ... [2022-01-11 05:58:09,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:58:09 BasicIcfg [2022-01-11 05:58:09,659 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:58:09,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:58:09,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:58:09,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:58:09,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:58:09" (1/4) ... [2022-01-11 05:58:09,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146475a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:58:09, skipping insertion in model container [2022-01-11 05:58:09,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:58:09" (2/4) ... [2022-01-11 05:58:09,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146475a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:58:09, skipping insertion in model container [2022-01-11 05:58:09,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:58:09" (3/4) ... [2022-01-11 05:58:09,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146475a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:58:09, skipping insertion in model container [2022-01-11 05:58:09,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:58:09" (4/4) ... [2022-01-11 05:58:09,665 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.cTransformedIcfg [2022-01-11 05:58:09,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:58:09,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:58:09,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:58:09,702 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 [2022-01-11 05:58:09,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:58:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-11 05:58:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-11 05:58:09,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:09,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:09,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash -878487567, now seen corresponding path program 1 times [2022-01-11 05:58:09,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:09,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026802442] [2022-01-11 05:58:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:09,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:09,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:58:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-11 05:58:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:58:10,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:10,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026802442] [2022-01-11 05:58:10,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026802442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:58:10,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:58:10,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 05:58:10,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607429174] [2022-01-11 05:58:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:58:10,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:58:10,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:58:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:58:10,089 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-11 05:58:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:10,188 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-01-11 05:58:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:58:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-11 05:58:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:10,201 INFO L225 Difference]: With dead ends: 36 [2022-01-11 05:58:10,202 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 05:58:10,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-11 05:58:10,208 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:10,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:58:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 05:58:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-11 05:58:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-11 05:58:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-11 05:58:10,242 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 20 [2022-01-11 05:58:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:10,243 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-11 05:58:10,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-11 05:58:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-11 05:58:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-11 05:58:10,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:10,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:10,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:58:10,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash 573011356, now seen corresponding path program 1 times [2022-01-11 05:58:10,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:10,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973957457] [2022-01-11 05:58:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:10,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:58:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-11 05:58:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 05:58:10,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973957457] [2022-01-11 05:58:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973957457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:10,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639383395] [2022-01-11 05:58:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:10,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:10,415 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) [2022-01-11 05:58:10,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:58:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:10,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 05:58:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 05:58:10,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 05:58:10,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639383395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:10,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:10,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-01-11 05:58:10,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976803370] [2022-01-11 05:58:10,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:10,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-11 05:58:10,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-11 05:58:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-11 05:58:10,820 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-11 05:58:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:10,950 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-01-11 05:58:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 05:58:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-01-11 05:58:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:10,952 INFO L225 Difference]: With dead ends: 35 [2022-01-11 05:58:10,952 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 05:58:10,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-11 05:58:10,954 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:10,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:58:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 05:58:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 05:58:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-11 05:58:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 05:58:10,966 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2022-01-11 05:58:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:10,966 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 05:58:10,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-11 05:58:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 05:58:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 05:58:10,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:10,967 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:11,183 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 [2022-01-11 05:58:11,184 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:11,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1452006525, now seen corresponding path program 1 times [2022-01-11 05:58:11,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337660775] [2022-01-11 05:58:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:11,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:58:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-11 05:58:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-11 05:58:11,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:11,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337660775] [2022-01-11 05:58:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337660775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:11,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644916023] [2022-01-11 05:58:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:11,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:11,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:11,336 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) [2022-01-11 05:58:11,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:58:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-11 05:58:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-11 05:58:11,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-11 05:58:11,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644916023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:11,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:11,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-11 05:58:11,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215384474] [2022-01-11 05:58:11,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-11 05:58:11,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-11 05:58:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-11 05:58:11,704 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-11 05:58:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:11,751 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-01-11 05:58:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:58:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-01-11 05:58:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:11,753 INFO L225 Difference]: With dead ends: 31 [2022-01-11 05:58:11,753 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 05:58:11,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-11 05:58:11,754 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:11,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 55 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:58:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 05:58:11,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-11 05:58:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-11 05:58:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-01-11 05:58:11,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 46 [2022-01-11 05:58:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:11,758 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-01-11 05:58:11,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-11 05:58:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-01-11 05:58:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 05:58:11,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:11,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:11,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:11,975 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 [2022-01-11 05:58:11,976 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash -579014909, now seen corresponding path program 2 times [2022-01-11 05:58:11,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755067729] [2022-01-11 05:58:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:11,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:12,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:58:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-11 05:58:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:12,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 05:58:12,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755067729] [2022-01-11 05:58:12,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755067729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260292414] [2022-01-11 05:58:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:58:12,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:12,522 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) [2022-01-11 05:58:12,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:58:12,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:58:12,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-11 05:58:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 05:58:13,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 05:58:47,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260292414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:58:47,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:58:47,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 14] total 43 [2022-01-11 05:58:47,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369858482] [2022-01-11 05:58:47,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:47,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-11 05:58:47,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-11 05:58:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-01-11 05:58:47,762 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-11 05:58:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:49,155 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2022-01-11 05:58:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-11 05:58:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 34 [2022-01-11 05:58:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:49,157 INFO L225 Difference]: With dead ends: 63 [2022-01-11 05:58:49,157 INFO L226 Difference]: Without dead ends: 42 [2022-01-11 05:58:49,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=352, Invalid=2618, Unknown=0, NotChecked=0, Total=2970 [2022-01-11 05:58:49,158 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:49,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 173 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 332 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-01-11 05:58:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-11 05:58:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-11 05:58:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-11 05:58:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2022-01-11 05:58:49,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 34 [2022-01-11 05:58:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:49,167 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2022-01-11 05:58:49,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 32 states have internal predecessors, (60), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-11 05:58:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2022-01-11 05:58:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 05:58:49,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:49,168 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:49,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:49,385 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 [2022-01-11 05:58:49,385 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash 863393056, now seen corresponding path program 2 times [2022-01-11 05:58:49,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:49,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874468609] [2022-01-11 05:58:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:49,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:58:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-11 05:58:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 05:58:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-11 05:58:49,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874468609] [2022-01-11 05:58:49,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874468609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:49,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80260227] [2022-01-11 05:58:49,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:58:49,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:49,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:49,522 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) [2022-01-11 05:58:49,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:58:49,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:58:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-11 05:58:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:58:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-11 05:58:50,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:50,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80260227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:50,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 05:58:50,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 21 [2022-01-11 05:58:50,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381162287] [2022-01-11 05:58:50,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 05:58:50,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 05:58:50,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:58:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 05:58:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-11 05:58:50,584 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-11 05:58:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:58:50,807 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2022-01-11 05:58:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 05:58:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 47 [2022-01-11 05:58:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:58:50,808 INFO L225 Difference]: With dead ends: 50 [2022-01-11 05:58:50,809 INFO L226 Difference]: Without dead ends: 44 [2022-01-11 05:58:50,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-01-11 05:58:50,810 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:58:50,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-11 05:58:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-11 05:58:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-01-11 05:58:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 5 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (25), 10 states have call predecessors, (25), 5 states have call successors, (25) [2022-01-11 05:58:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2022-01-11 05:58:50,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 47 [2022-01-11 05:58:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:58:50,817 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2022-01-11 05:58:50,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-01-11 05:58:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2022-01-11 05:58:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-11 05:58:50,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:58:50,818 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:58:50,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 05:58:51,035 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 [2022-01-11 05:58:51,035 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:58:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:58:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash 43817754, now seen corresponding path program 3 times [2022-01-11 05:58:51,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:58:51,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179678421] [2022-01-11 05:58:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:58:51,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:58:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:51,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-11 05:58:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:51,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-11 05:58:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:51,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:58:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:58:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-11 05:58:51,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:58:51,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179678421] [2022-01-11 05:58:51,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179678421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:58:51,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786055206] [2022-01-11 05:58:51,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:58:51,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:58:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:58:51,814 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) [2022-01-11 05:58:51,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 05:58:51,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-11 05:58:51,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:58:51,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 86 conjunts are in the unsatisfiable core [2022-01-11 05:58:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates...