/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 02:23:51,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:23:51,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:23:51,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 02:23:51,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 02:23:51,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 02:23:51,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 02:23:51,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 02:23:51,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 02:23:51,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 02:23:51,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 02:23:51,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 02:23:51,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 02:23:51,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 02:23:51,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 02:23:51,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 02:23:51,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 02:23:51,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 02:23:51,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 02:23:51,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 02:23:51,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 02:23:51,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 02:23:51,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 02:23:51,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 02:23:51,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 02:23:51,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 02:23:51,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 02:23:51,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 02:23:51,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 02:23:51,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 02:23:51,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 02:23:51,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 02:23:51,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 02:23:51,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 02:23:51,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 02:23:51,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 02:23:51,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 02:23:51,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 02:23:51,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 02:23:51,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 02:23:51,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 02:23:51,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 02:23:51,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:23:51,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:23:51,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:23:51,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:23:51,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:23:51,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:23:51,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:23:51,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:23:51,248 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:23:51,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:23:51,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:23:51,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:23:51,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:23:51,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:23:51,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:23:51,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:23:51,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:23:51,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:23:51,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:23:51,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:23:51,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:23:51,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:23:51,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:23:51,456 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:23:51,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2022-01-31 02:23:51,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fca6fd1da/f84fcc99189f46ba9f2e1a1d304b3ce9/FLAG078cb7af6 [2022-01-31 02:23:51,835 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:23:51,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-1.c [2022-01-31 02:23:51,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fca6fd1da/f84fcc99189f46ba9f2e1a1d304b3ce9/FLAG078cb7af6 [2022-01-31 02:23:52,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fca6fd1da/f84fcc99189f46ba9f2e1a1d304b3ce9 [2022-01-31 02:23:52,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:23:52,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:23:52,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:23:52,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:23:52,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:23:52,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc5a808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52, skipping insertion in model container [2022-01-31 02:23:52,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:23:52,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:23:52,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-1.c[322,335] [2022-01-31 02:23:52,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:23:52,412 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:23:52,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-1.c[322,335] [2022-01-31 02:23:52,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:23:52,429 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:23:52,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52 WrapperNode [2022-01-31 02:23:52,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:23:52,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:23:52,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:23:52,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:23:52,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:23:52,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:23:52,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:23:52,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:23:52,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (1/1) ... [2022-01-31 02:23:52,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:23:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:23:52,482 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) [2022-01-31 02:23:52,490 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 [2022-01-31 02:23:52,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:23:52,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:23:52,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:23:52,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:23:52,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:23:52,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:23:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:23:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:23:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:23:52,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:23:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:23:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:23:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:23:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:23:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:23:52,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:23:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:23:52,559 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:23:52,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:23:52,654 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:23:52,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:23:52,658 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 02:23:52,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:23:52 BoogieIcfgContainer [2022-01-31 02:23:52,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:23:52,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:23:52,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:23:52,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:23:52,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:23:52" (1/3) ... [2022-01-31 02:23:52,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714c1191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:23:52, skipping insertion in model container [2022-01-31 02:23:52,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:23:52" (2/3) ... [2022-01-31 02:23:52,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714c1191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:23:52, skipping insertion in model container [2022-01-31 02:23:52,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:23:52" (3/3) ... [2022-01-31 02:23:52,667 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2022-01-31 02:23:52,671 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:23:52,672 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:23:52,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:23:52,723 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 [2022-01-31 02:23:52,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:23:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 02:23:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 02:23:52,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:23:52,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:23:52,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:23:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:23:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2022-01-31 02:23:52,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:23:52,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714813483] [2022-01-31 02:23:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:23:52,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:23:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:23:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:52,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:23:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714813483] [2022-01-31 02:23:52,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714813483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:23:52,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:23:52,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 02:23:52,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461203422] [2022-01-31 02:23:52,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:23:52,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 02:23:52,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:23:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 02:23:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 02:23:52,979 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:23:53,015 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-01-31 02:23:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 02:23:53,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 02:23:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:23:53,025 INFO L225 Difference]: With dead ends: 29 [2022-01-31 02:23:53,025 INFO L226 Difference]: Without dead ends: 12 [2022-01-31 02:23:53,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 02:23:53,035 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:23:53,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:23:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-31 02:23:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-31 02:23:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-01-31 02:23:53,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2022-01-31 02:23:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:23:53,064 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-01-31 02:23:53,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-01-31 02:23:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 02:23:53,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:23:53,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:23:53,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:23:53,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:23:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:23:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2022-01-31 02:23:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:23:53,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4513521] [2022-01-31 02:23:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:23:53,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:23:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:23:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:53,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:23:53,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4513521] [2022-01-31 02:23:53,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4513521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:23:53,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:23:53,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:23:53,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726659835] [2022-01-31 02:23:53,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:23:53,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:23:53,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:23:53,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:23:53,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:23:53,181 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:23:53,211 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-01-31 02:23:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:23:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 02:23:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:23:53,212 INFO L225 Difference]: With dead ends: 18 [2022-01-31 02:23:53,212 INFO L226 Difference]: Without dead ends: 13 [2022-01-31 02:23:53,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:23:53,213 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:23:53,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:23:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-31 02:23:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-31 02:23:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-01-31 02:23:53,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-01-31 02:23:53,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:23:53,218 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-01-31 02:23:53,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-01-31 02:23:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 02:23:53,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:23:53,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:23:53,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 02:23:53,222 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:23:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:23:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2022-01-31 02:23:53,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:23:53,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201371369] [2022-01-31 02:23:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:23:53,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:23:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:23:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:53,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:23:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201371369] [2022-01-31 02:23:53,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201371369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:23:53,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351071104] [2022-01-31 02:23:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:23:53,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:23:53,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:23:53,299 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) [2022-01-31 02:23:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:23:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 02:23:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:23:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:53,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:23:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:53,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351071104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:23:53,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:23:53,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 02:23:53,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089071996] [2022-01-31 02:23:53,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:23:53,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 02:23:53,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:23:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 02:23:53,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-31 02:23:53,503 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:23:53,585 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-01-31 02:23:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 02:23:53,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 02:23:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:23:53,586 INFO L225 Difference]: With dead ends: 21 [2022-01-31 02:23:53,586 INFO L226 Difference]: Without dead ends: 16 [2022-01-31 02:23:53,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-31 02:23:53,592 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:23:53,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:23:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-31 02:23:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-31 02:23:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-01-31 02:23:53,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2022-01-31 02:23:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:23:53,598 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-01-31 02:23:53,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-01-31 02:23:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 02:23:53,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:23:53,600 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:23:53,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 02:23:53,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:23:53,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:23:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:23:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 2 times [2022-01-31 02:23:53,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:23:53,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026119750] [2022-01-31 02:23:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:23:53,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:23:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:23:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:53,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:23:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026119750] [2022-01-31 02:23:53,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026119750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:23:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065400263] [2022-01-31 02:23:53,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:23:53,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:23:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:23:53,932 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) [2022-01-31 02:23:53,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:23:53,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:23:53,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:23:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 02:23:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:23:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:23:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065400263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:23:54,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:23:54,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10] total 17 [2022-01-31 02:23:54,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658237632] [2022-01-31 02:23:54,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:23:54,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 02:23:54,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:23:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 02:23:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-31 02:23:54,242 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:23:54,863 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-01-31 02:23:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 02:23:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 02:23:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:23:54,864 INFO L225 Difference]: With dead ends: 30 [2022-01-31 02:23:54,864 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 02:23:54,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2022-01-31 02:23:54,866 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:23:54,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:23:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 02:23:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 02:23:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-01-31 02:23:54,871 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2022-01-31 02:23:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:23:54,871 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-01-31 02:23:54,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:23:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-01-31 02:23:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 02:23:54,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:23:54,872 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:23:54,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 02:23:55,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 02:23:55,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:23:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:23:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1967633380, now seen corresponding path program 3 times [2022-01-31 02:23:55,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:23:55,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332577962] [2022-01-31 02:23:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:23:55,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:23:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:55,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:23:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:23:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:55,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:23:55,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332577962] [2022-01-31 02:23:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332577962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:23:55,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199344886] [2022-01-31 02:23:55,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:23:55,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:23:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:23:55,252 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) [2022-01-31 02:23:55,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:23:55,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 02:23:55,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:23:55,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 02:23:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:23:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:55,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:23:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:23:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199344886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:23:55,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:23:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 16] total 29 [2022-01-31 02:23:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777423973] [2022-01-31 02:23:55,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:23:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 02:23:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:23:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 02:23:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-01-31 02:23:55,783 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:24:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:24:13,713 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-01-31 02:24:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 02:24:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 02:24:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:24:13,714 INFO L225 Difference]: With dead ends: 42 [2022-01-31 02:24:13,714 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 02:24:13,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=722, Invalid=2248, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 02:24:13,716 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:24:13,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 91 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 02:24:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 02:24:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 02:24:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:24:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-01-31 02:24:13,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 21 [2022-01-31 02:24:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:24:13,734 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-01-31 02:24:13,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:24:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-01-31 02:24:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 02:24:13,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:24:13,735 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:24:13,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 02:24:13,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:24:13,940 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:24:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:24:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1118023580, now seen corresponding path program 4 times [2022-01-31 02:24:13,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:24:13,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351564962] [2022-01-31 02:24:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:24:13,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:24:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:24:14,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:24:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:24:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:24:14,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:24:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351564962] [2022-01-31 02:24:14,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351564962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:24:14,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113715721] [2022-01-31 02:24:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:24:14,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:24:14,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:24:14,366 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) [2022-01-31 02:24:14,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:24:14,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:24:14,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:24:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 02:24:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:24:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:24:14,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:24:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:24:15,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113715721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:24:15,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:24:15,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 02:24:15,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514374999] [2022-01-31 02:24:15,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:24:15,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 02:24:15,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:24:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 02:24:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 02:24:15,466 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:25:27,328 WARN L228 SmtUtils]: Spent 53.39s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:26:12,521 WARN L228 SmtUtils]: Spent 37.17s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:26:15,212 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2022-01-31 02:26:51,696 WARN L228 SmtUtils]: Spent 29.89s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:26:54,164 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2022-01-31 02:27:20,768 WARN L228 SmtUtils]: Spent 14.45s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:27:45,905 WARN L228 SmtUtils]: Spent 14.59s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:28:04,349 WARN L228 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:28:28,427 WARN L228 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:29:46,343 WARN L228 SmtUtils]: Spent 41.89s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 02:29:48,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:29:49,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:29:56,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 02:29:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:29:56,852 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2022-01-31 02:29:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 02:29:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 02:29:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:29:56,853 INFO L225 Difference]: With dead ends: 63 [2022-01-31 02:29:56,853 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 02:29:56,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 327.2s TimeCoverageRelationStatistics Valid=2373, Invalid=6563, Unknown=2, NotChecked=374, Total=9312 [2022-01-31 02:29:56,858 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:29:56,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 671 Invalid, 1 Unknown, 2 Unchecked, 15.2s Time] [2022-01-31 02:29:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 02:29:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-31 02:29:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:29:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-01-31 02:29:56,878 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 33 [2022-01-31 02:29:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:29:56,888 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-01-31 02:29:56,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:29:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-01-31 02:29:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 02:29:56,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:29:56,889 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:29:56,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 02:29:57,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:29:57,106 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:29:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:29:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1947289956, now seen corresponding path program 5 times [2022-01-31 02:29:57,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:29:57,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010676498] [2022-01-31 02:29:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:29:57,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:29:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:29:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:29:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:29:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:29:58,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:29:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010676498] [2022-01-31 02:29:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010676498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:29:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555535013] [2022-01-31 02:29:58,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:29:58,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:29:58,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:29:58,226 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) [2022-01-31 02:29:58,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:37:04,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-31 02:37:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:37:04,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 95 conjunts are in the unsatisfiable core [2022-01-31 02:37:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:37:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:37:05,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:37:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:37:08,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555535013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:37:08,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:37:08,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 02:37:08,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310544632] [2022-01-31 02:37:08,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:37:08,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 02:37:08,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:37:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 02:37:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2496, Invalid=7010, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 02:37:08,465 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 98 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 97 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:37:12,318 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967222) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967220 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967242 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967212 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967254 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967246 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967226 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967248 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967210 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967224 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967244 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967232 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967218 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967238 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967206 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967216 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967252 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967208) 4294967296)) (< 1 (mod (+ 4294967250 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967234 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967228) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967230 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967240 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967236 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967214 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967204 c_main_~x~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2022-01-31 02:37:14,330 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967222) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967220 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967242 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967212 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967254 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967246 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967226 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967248 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967210 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967224 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967244 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967232 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967218 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967238 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967206 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967216 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967252 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967208) 4294967296)) (< 1 (mod (+ 4294967250 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967234 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967228) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967230 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967240 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967236 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967214 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false [2022-01-31 02:37:16,341 WARN L838 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ c_main_~x~0 4294967256) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967280) 4294967296)) (< 1 (mod (+ 4294967274 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967222) 4294967296)) (< 1 (mod c_main_~x~0 4294967296)) (< 1 (mod (+ 4294967220 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967242 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967294 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967212 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967254 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967246 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967226 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967248 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967258 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967210 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967292 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967286 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967272 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967224 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967270 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967244 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967232 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967264) 4294967296)) (< 1 (mod (+ 4294967260 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967218 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967288 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967238 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967290 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967284) 4294967296)) (< 1 (mod (+ 4294967216 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967252 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967208) 4294967296)) (< 1 (mod (+ 4294967250 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967262 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967234 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967276 c_main_~x~0) 4294967296)) (< 1 (mod (+ c_main_~x~0 4294967228) 4294967296)) (< 1 (mod (+ 4294967278 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967268 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967230 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967240 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967236 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967214 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967282 c_main_~x~0) 4294967296)) (< 1 (mod (+ 4294967266 c_main_~x~0) 4294967296))) is different from false