/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_REDUNDANT_FLOW -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 14:04:22,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 14:04:22,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 14:04:22,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 14:04:22,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 14:04:22,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 14:04:22,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 14:04:22,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 14:04:22,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 14:04:22,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 14:04:22,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 14:04:22,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 14:04:22,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 14:04:22,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 14:04:22,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 14:04:22,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 14:04:22,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 14:04:22,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 14:04:22,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 14:04:22,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 14:04:22,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 14:04:22,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 14:04:22,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 14:04:22,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 14:04:22,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 14:04:22,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 14:04:22,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 14:04:22,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 14:04:22,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 14:04:22,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 14:04:22,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 14:04:22,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 14:04:22,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 14:04:22,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 14:04:22,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 14:04:22,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 14:04:22,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 14:04:22,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 14:04:22,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 14:04:22,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 14:04:22,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 14:04:22,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-12 14:04:22,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 14:04:22,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 14:04:22,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 14:04:22,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 14:04:22,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 14:04:22,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 14:04:22,295 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 14:04:22,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 14:04:22,296 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 14:04:22,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 14:04:22,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 14:04:22,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 14:04:22,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 14:04:22,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 14:04:22,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 14:04:22,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 14:04:22,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 14:04:22,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:04:22,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 14:04:22,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 14:04:22,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 14:04:22,299 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-12 14:04:22,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 14:04:22,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 14:04:22,299 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 14:04:22,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_REDUNDANT_FLOW [2022-12-12 14:04:22,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 14:04:22,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 14:04:22,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 14:04:22,653 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 14:04:22,655 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 14:04:22,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2022-12-12 14:04:23,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 14:04:23,978 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 14:04:23,979 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i [2022-12-12 14:04:24,005 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f777020d/c0b339c07c044ffc8fd2b5b4892a6027/FLAG409e6718d [2022-12-12 14:04:24,022 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f777020d/c0b339c07c044ffc8fd2b5b4892a6027 [2022-12-12 14:04:24,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 14:04:24,025 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 14:04:24,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 14:04:24,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 14:04:24,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 14:04:24,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f736f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24, skipping insertion in model container [2022-12-12 14:04:24,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 14:04:24,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 14:04:24,472 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2022-12-12 14:04:24,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:04:24,495 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 14:04:24,551 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2022-12-12 14:04:24,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 14:04:24,600 INFO L208 MainTranslator]: Completed translation [2022-12-12 14:04:24,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24 WrapperNode [2022-12-12 14:04:24,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 14:04:24,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 14:04:24,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 14:04:24,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 14:04:24,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,642 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2022-12-12 14:04:24,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 14:04:24,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 14:04:24,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 14:04:24,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 14:04:24,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,672 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 14:04:24,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 14:04:24,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 14:04:24,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 14:04:24,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (1/1) ... [2022-12-12 14:04:24,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 14:04:24,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:24,720 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) [2022-12-12 14:04:24,742 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 [2022-12-12 14:04:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 14:04:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 14:04:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-12 14:04:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 14:04:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 14:04:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 14:04:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 14:04:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 14:04:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 14:04:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-12 14:04:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 14:04:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 14:04:24,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 14:04:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 14:04:24,761 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 14:04:24,872 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 14:04:24,874 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 14:04:25,110 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 14:04:25,117 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 14:04:25,117 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 14:04:25,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:04:25 BoogieIcfgContainer [2022-12-12 14:04:25,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 14:04:25,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 14:04:25,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 14:04:25,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 14:04:25,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 02:04:24" (1/3) ... [2022-12-12 14:04:25,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ee3e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:04:25, skipping insertion in model container [2022-12-12 14:04:25,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 02:04:24" (2/3) ... [2022-12-12 14:04:25,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ee3e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 02:04:25, skipping insertion in model container [2022-12-12 14:04:25,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 02:04:25" (3/3) ... [2022-12-12 14:04:25,132 INFO L112 eAbstractionObserver]: Analyzing ICFG arithmetic_prog_ok.i [2022-12-12 14:04:25,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 14:04:25,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 14:04:25,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 14:04:25,254 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-12 14:04:25,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 278 flow [2022-12-12 14:04:25,376 INFO L130 PetriNetUnfolder]: 10/129 cut-off events. [2022-12-12 14:04:25,376 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 14:04:25,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 10/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 82. Up to 3 conditions per place. [2022-12-12 14:04:25,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 131 transitions, 278 flow [2022-12-12 14:04:25,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 118 transitions, 248 flow [2022-12-12 14:04:25,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 14:04:25,465 INFO L357 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=false, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15a55eb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 14:04:25,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 14:04:25,516 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-12-12 14:04:25,516 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-12 14:04:25,516 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:25,517 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:25,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1760909140, now seen corresponding path program 1 times [2022-12-12 14:04:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:25,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601494809] [2022-12-12 14:04:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:04:25,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601494809] [2022-12-12 14:04:25,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601494809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:04:25,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:04:25,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:04:25,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059433018] [2022-12-12 14:04:25,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:04:25,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:04:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:04:26,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:04:26,004 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 131 [2022-12-12 14:04:26,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:26,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:26,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 131 [2022-12-12 14:04:26,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:26,081 INFO L130 PetriNetUnfolder]: 16/170 cut-off events. [2022-12-12 14:04:26,081 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-12 14:04:26,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 170 events. 16/170 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 378 event pairs, 5 based on Foata normal form. 21/181 useless extension candidates. Maximal degree in co-relation 155. Up to 22 conditions per place. [2022-12-12 14:04:26,085 INFO L137 encePairwiseOnDemand]: 124/131 looper letters, 12 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-12-12 14:04:26,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 279 flow [2022-12-12 14:04:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:04:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:04:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2022-12-12 14:04:26,105 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9363867684478372 [2022-12-12 14:04:26,109 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 2 predicate places. [2022-12-12 14:04:26,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 279 flow [2022-12-12 14:04:26,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 118 transitions, 265 flow, removed 2 selfloop flow, removed 4 redundant places. [2022-12-12 14:04:26,114 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 265 flow [2022-12-12 14:04:26,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:26,114 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:26,115 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 14:04:26,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2125532005, now seen corresponding path program 1 times [2022-12-12 14:04:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:26,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257594002] [2022-12-12 14:04:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:04:26,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:26,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257594002] [2022-12-12 14:04:26,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257594002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449600125] [2022-12-12 14:04:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:26,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:26,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:26,375 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) [2022-12-12 14:04:26,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 14:04:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-12 14:04:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:04:26,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 14:04:26,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449600125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:04:26,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 14:04:26,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-12 14:04:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019839991] [2022-12-12 14:04:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:04:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:04:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:04:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-12 14:04:26,554 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 131 [2022-12-12 14:04:26,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:26,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:26,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 131 [2022-12-12 14:04:26,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:26,625 INFO L130 PetriNetUnfolder]: 31/236 cut-off events. [2022-12-12 14:04:26,625 INFO L131 PetriNetUnfolder]: For 72/85 co-relation queries the response was YES. [2022-12-12 14:04:26,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 236 events. 31/236 cut-off events. For 72/85 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 771 event pairs, 9 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 95. Up to 36 conditions per place. [2022-12-12 14:04:26,632 INFO L137 encePairwiseOnDemand]: 128/131 looper letters, 16 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2022-12-12 14:04:26,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 123 transitions, 314 flow [2022-12-12 14:04:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:04:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:04:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2022-12-12 14:04:26,635 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9083969465648855 [2022-12-12 14:04:26,636 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 0 predicate places. [2022-12-12 14:04:26,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 123 transitions, 314 flow [2022-12-12 14:04:26,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 123 transitions, 308 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-12 14:04:26,640 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 308 flow [2022-12-12 14:04:26,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:26,640 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:26,641 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:26,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 14:04:26,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:26,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash -417600863, now seen corresponding path program 1 times [2022-12-12 14:04:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918332470] [2022-12-12 14:04:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:04:27,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918332470] [2022-12-12 14:04:27,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918332470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310077670] [2022-12-12 14:04:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:27,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:27,036 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) [2022-12-12 14:04:27,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 14:04:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 14:04:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:04:27,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:04:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 14:04:27,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310077670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:04:27,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:04:27,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 14:04:27,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802064486] [2022-12-12 14:04:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:04:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 14:04:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 14:04:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 14:04:27,320 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 131 [2022-12-12 14:04:27,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 308 flow. Second operand has 10 states, 10 states have (on average 116.1) internal successors, (1161), 10 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:27,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:27,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 131 [2022-12-12 14:04:27,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:27,423 INFO L130 PetriNetUnfolder]: 40/275 cut-off events. [2022-12-12 14:04:27,423 INFO L131 PetriNetUnfolder]: For 73/85 co-relation queries the response was YES. [2022-12-12 14:04:27,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 275 events. 40/275 cut-off events. For 73/85 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 800 event pairs, 11 based on Foata normal form. 2/251 useless extension candidates. Maximal degree in co-relation 288. Up to 46 conditions per place. [2022-12-12 14:04:27,426 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 19 selfloop transitions, 9 changer transitions 0/135 dead transitions. [2022-12-12 14:04:27,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 135 transitions, 414 flow [2022-12-12 14:04:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 14:04:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 14:04:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1055 transitions. [2022-12-12 14:04:27,429 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8948261238337574 [2022-12-12 14:04:27,430 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 8 predicate places. [2022-12-12 14:04:27,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 135 transitions, 414 flow [2022-12-12 14:04:27,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 364 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-12-12 14:04:27,433 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 364 flow [2022-12-12 14:04:27,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.1) internal successors, (1161), 10 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:27,434 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:27,434 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:27,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 14:04:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-12 14:04:27,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1845610601, now seen corresponding path program 2 times [2022-12-12 14:04:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:27,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052349664] [2022-12-12 14:04:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-12 14:04:27,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052349664] [2022-12-12 14:04:27,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052349664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860638721] [2022-12-12 14:04:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:04:27,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:27,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:27,777 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) [2022-12-12 14:04:27,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 14:04:27,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:04:27,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:04:27,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 14:04:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-12 14:04:27,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 14:04:27,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860638721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:04:27,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 14:04:27,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-12 14:04:27,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580336679] [2022-12-12 14:04:27,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:04:27,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 14:04:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 14:04:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-12 14:04:27,962 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 131 [2022-12-12 14:04:27,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 364 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:27,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:27,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 131 [2022-12-12 14:04:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:28,213 INFO L130 PetriNetUnfolder]: 328/1247 cut-off events. [2022-12-12 14:04:28,213 INFO L131 PetriNetUnfolder]: For 173/185 co-relation queries the response was YES. [2022-12-12 14:04:28,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2142 conditions, 1247 events. 328/1247 cut-off events. For 173/185 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7355 event pairs, 45 based on Foata normal form. 0/1091 useless extension candidates. Maximal degree in co-relation 1780. Up to 195 conditions per place. [2022-12-12 14:04:28,223 INFO L137 encePairwiseOnDemand]: 122/131 looper letters, 37 selfloop transitions, 18 changer transitions 0/167 dead transitions. [2022-12-12 14:04:28,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 167 transitions, 551 flow [2022-12-12 14:04:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 14:04:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 14:04:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 823 transitions. [2022-12-12 14:04:28,226 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8974918211559433 [2022-12-12 14:04:28,228 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 12 predicate places. [2022-12-12 14:04:28,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 167 transitions, 551 flow [2022-12-12 14:04:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 167 transitions, 537 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-12-12 14:04:28,234 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 167 transitions, 537 flow [2022-12-12 14:04:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:28,237 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:28,237 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:28,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 14:04:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:28,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1057015131, now seen corresponding path program 3 times [2022-12-12 14:04:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785268140] [2022-12-12 14:04:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-12 14:04:28,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785268140] [2022-12-12 14:04:28,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785268140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404482336] [2022-12-12 14:04:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 14:04:28,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:28,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:28,619 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) [2022-12-12 14:04:28,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 14:04:28,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 14:04:28,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:04:28,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 14:04:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-12 14:04:28,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:04:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-12 14:04:28,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404482336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:04:28,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:04:28,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-12 14:04:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409775342] [2022-12-12 14:04:28,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:04:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-12 14:04:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-12 14:04:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-12 14:04:28,911 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2022-12-12 14:04:28,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 167 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 114.7) internal successors, (1147), 10 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:28,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:28,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2022-12-12 14:04:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:29,246 INFO L130 PetriNetUnfolder]: 536/1999 cut-off events. [2022-12-12 14:04:29,247 INFO L131 PetriNetUnfolder]: For 447/522 co-relation queries the response was YES. [2022-12-12 14:04:29,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1999 events. 536/1999 cut-off events. For 447/522 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13545 event pairs, 78 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 3190. Up to 345 conditions per place. [2022-12-12 14:04:29,262 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 37 selfloop transitions, 9 changer transitions 0/185 dead transitions. [2022-12-12 14:04:29,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 730 flow [2022-12-12 14:04:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-12 14:04:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-12 14:04:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1041 transitions. [2022-12-12 14:04:29,265 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8829516539440203 [2022-12-12 14:04:29,265 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 20 predicate places. [2022-12-12 14:04:29,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 730 flow [2022-12-12 14:04:29,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 644 flow, removed 41 selfloop flow, removed 2 redundant places. [2022-12-12 14:04:29,269 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 185 transitions, 644 flow [2022-12-12 14:04:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.7) internal successors, (1147), 10 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:29,270 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:29,270 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:29,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-12 14:04:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:29,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash -477584277, now seen corresponding path program 4 times [2022-12-12 14:04:29,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940804619] [2022-12-12 14:04:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:29,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 14:04:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940804619] [2022-12-12 14:04:29,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940804619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:04:29,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 14:04:29,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 14:04:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200264784] [2022-12-12 14:04:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:04:29,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 14:04:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 14:04:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 14:04:29,644 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 131 [2022-12-12 14:04:29,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 185 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:29,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:29,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 131 [2022-12-12 14:04:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:29,811 INFO L130 PetriNetUnfolder]: 174/1014 cut-off events. [2022-12-12 14:04:29,811 INFO L131 PetriNetUnfolder]: For 313/331 co-relation queries the response was YES. [2022-12-12 14:04:29,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 1014 events. 174/1014 cut-off events. For 313/331 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5763 event pairs, 9 based on Foata normal form. 98/1032 useless extension candidates. Maximal degree in co-relation 1294. Up to 155 conditions per place. [2022-12-12 14:04:29,817 INFO L137 encePairwiseOnDemand]: 123/131 looper letters, 41 selfloop transitions, 8 changer transitions 0/172 dead transitions. [2022-12-12 14:04:29,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 172 transitions, 705 flow [2022-12-12 14:04:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 14:04:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 14:04:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2022-12-12 14:04:29,819 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8575063613231552 [2022-12-12 14:04:29,820 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2022-12-12 14:04:29,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 172 transitions, 705 flow [2022-12-12 14:04:29,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 172 transitions, 679 flow, removed 13 selfloop flow, removed 0 redundant places. [2022-12-12 14:04:29,823 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 172 transitions, 679 flow [2022-12-12 14:04:29,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:29,823 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:29,823 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:29,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-12 14:04:29,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1077458279, now seen corresponding path program 5 times [2022-12-12 14:04:29,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:29,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807860145] [2022-12-12 14:04:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 43 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-12 14:04:30,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:30,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807860145] [2022-12-12 14:04:30,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807860145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:30,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438265171] [2022-12-12 14:04:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 14:04:30,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:30,031 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) [2022-12-12 14:04:30,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 14:04:30,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-12 14:04:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:04:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 14:04:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-12 14:04:30,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-12 14:04:30,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438265171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 14:04:30,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-12 14:04:30,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 8 [2022-12-12 14:04:30,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962382816] [2022-12-12 14:04:30,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 14:04:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-12 14:04:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-12 14:04:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-12 14:04:30,253 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 131 [2022-12-12 14:04:30,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 172 transitions, 679 flow. Second operand has 6 states, 6 states have (on average 112.66666666666667) internal successors, (676), 6 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:30,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:30,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 131 [2022-12-12 14:04:30,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:30,411 INFO L130 PetriNetUnfolder]: 152/937 cut-off events. [2022-12-12 14:04:30,411 INFO L131 PetriNetUnfolder]: For 550/567 co-relation queries the response was YES. [2022-12-12 14:04:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 937 events. 152/937 cut-off events. For 550/567 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5060 event pairs, 8 based on Foata normal form. 2/877 useless extension candidates. Maximal degree in co-relation 1550. Up to 140 conditions per place. [2022-12-12 14:04:30,417 INFO L137 encePairwiseOnDemand]: 120/131 looper letters, 39 selfloop transitions, 16 changer transitions 0/173 dead transitions. [2022-12-12 14:04:30,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 788 flow [2022-12-12 14:04:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 14:04:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 14:04:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 899 transitions. [2022-12-12 14:04:30,420 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.857824427480916 [2022-12-12 14:04:30,420 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 26 predicate places. [2022-12-12 14:04:30,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 788 flow [2022-12-12 14:04:30,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 173 transitions, 756 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-12 14:04:30,424 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 173 transitions, 756 flow [2022-12-12 14:04:30,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.66666666666667) internal successors, (676), 6 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:30,424 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:30,425 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:30,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 14:04:30,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:30,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:30,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -603481, now seen corresponding path program 6 times [2022-12-12 14:04:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143706438] [2022-12-12 14:04:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:30,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-12 14:04:30,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143706438] [2022-12-12 14:04:30,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143706438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987466690] [2022-12-12 14:04:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 14:04:30,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:30,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:04:30,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 14:04:31,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-12 14:04:31,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:04:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-12 14:04:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 14:04:31,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:04:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-12 14:04:31,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987466690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:04:31,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:04:31,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2022-12-12 14:04:31,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894272127] [2022-12-12 14:04:31,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:04:31,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 14:04:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 14:04:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-12 14:04:31,157 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 131 [2022-12-12 14:04:31,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 173 transitions, 756 flow. Second operand has 13 states, 13 states have (on average 107.61538461538461) internal successors, (1399), 13 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:31,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:31,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 131 [2022-12-12 14:04:31,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:31,853 INFO L130 PetriNetUnfolder]: 222/866 cut-off events. [2022-12-12 14:04:31,853 INFO L131 PetriNetUnfolder]: For 1107/1129 co-relation queries the response was YES. [2022-12-12 14:04:31,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 866 events. 222/866 cut-off events. For 1107/1129 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3593 event pairs, 15 based on Foata normal form. 4/825 useless extension candidates. Maximal degree in co-relation 1730. Up to 108 conditions per place. [2022-12-12 14:04:31,860 INFO L137 encePairwiseOnDemand]: 116/131 looper letters, 105 selfloop transitions, 116 changer transitions 2/325 dead transitions. [2022-12-12 14:04:31,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 325 transitions, 1888 flow [2022-12-12 14:04:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-12 14:04:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-12 14:04:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5689 transitions. [2022-12-12 14:04:31,872 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8042126095561211 [2022-12-12 14:04:31,874 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 74 predicate places. [2022-12-12 14:04:31,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 325 transitions, 1888 flow [2022-12-12 14:04:31,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 325 transitions, 1439 flow, removed 131 selfloop flow, removed 13 redundant places. [2022-12-12 14:04:31,911 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 325 transitions, 1439 flow [2022-12-12 14:04:31,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 107.61538461538461) internal successors, (1399), 13 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:31,912 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:31,913 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:31,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 14:04:32,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:32,119 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:32,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1115216484, now seen corresponding path program 7 times [2022-12-12 14:04:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228604524] [2022-12-12 14:04:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 14:04:32,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228604524] [2022-12-12 14:04:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228604524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055792423] [2022-12-12 14:04:32,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 14:04:32,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:32,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:32,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:04:32,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 14:04:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 14:04:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 14:04:32,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:04:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-12 14:04:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055792423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:04:32,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:04:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-12-12 14:04:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950293215] [2022-12-12 14:04:32,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:04:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-12 14:04:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-12 14:04:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-12 14:04:32,667 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2022-12-12 14:04:32,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 325 transitions, 1439 flow. Second operand has 11 states, 11 states have (on average 114.54545454545455) internal successors, (1260), 11 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:32,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:32,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2022-12-12 14:04:32,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:32,829 INFO L130 PetriNetUnfolder]: 232/941 cut-off events. [2022-12-12 14:04:32,830 INFO L131 PetriNetUnfolder]: For 887/1000 co-relation queries the response was YES. [2022-12-12 14:04:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 941 events. 232/941 cut-off events. For 887/1000 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4078 event pairs, 14 based on Foata normal form. 11/915 useless extension candidates. Maximal degree in co-relation 1571. Up to 121 conditions per place. [2022-12-12 14:04:32,835 INFO L137 encePairwiseOnDemand]: 125/131 looper letters, 42 selfloop transitions, 12 changer transitions 2/334 dead transitions. [2022-12-12 14:04:32,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 334 transitions, 1615 flow [2022-12-12 14:04:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 14:04:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 14:04:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1378 transitions. [2022-12-12 14:04:32,839 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8765903307888041 [2022-12-12 14:04:32,839 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 72 predicate places. [2022-12-12 14:04:32,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 334 transitions, 1615 flow [2022-12-12 14:04:32,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 334 transitions, 1535 flow, removed 34 selfloop flow, removed 6 redundant places. [2022-12-12 14:04:32,844 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 334 transitions, 1535 flow [2022-12-12 14:04:32,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 114.54545454545455) internal successors, (1260), 11 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:32,845 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 14:04:32,845 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 14:04:32,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 14:04:33,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:33,052 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 14:04:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 14:04:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2080663952, now seen corresponding path program 8 times [2022-12-12 14:04:33,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 14:04:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395687837] [2022-12-12 14:04:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 14:04:33,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 14:04:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 14:04:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 8 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:04:33,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 14:04:33,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395687837] [2022-12-12 14:04:33,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395687837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 14:04:33,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346526257] [2022-12-12 14:04:33,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 14:04:33,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 14:04:33,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 14:04:33,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 14:04:33,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 14:04:34,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 14:04:34,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 14:04:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-12 14:04:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 14:04:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 8 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:04:34,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 14:04:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 14:04:38,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346526257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 14:04:38,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 14:04:38,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 43 [2022-12-12 14:04:38,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822810331] [2022-12-12 14:04:38,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 14:04:38,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-12 14:04:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 14:04:38,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-12 14:04:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-12-12 14:04:38,293 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 131 [2022-12-12 14:04:38,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 334 transitions, 1535 flow. Second operand has 43 states, 43 states have (on average 109.93023255813954) internal successors, (4727), 43 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:38,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 14:04:38,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 131 [2022-12-12 14:04:38,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 14:04:39,542 INFO L130 PetriNetUnfolder]: 210/887 cut-off events. [2022-12-12 14:04:39,542 INFO L131 PetriNetUnfolder]: For 841/961 co-relation queries the response was YES. [2022-12-12 14:04:39,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 887 events. 210/887 cut-off events. For 841/961 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3734 event pairs, 9 based on Foata normal form. 43/912 useless extension candidates. Maximal degree in co-relation 1505. Up to 118 conditions per place. [2022-12-12 14:04:39,546 INFO L137 encePairwiseOnDemand]: 122/131 looper letters, 0 selfloop transitions, 0 changer transitions 337/337 dead transitions. [2022-12-12 14:04:39,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 337 transitions, 1730 flow [2022-12-12 14:04:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 14:04:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 14:04:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2200 transitions. [2022-12-12 14:04:39,549 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8396946564885496 [2022-12-12 14:04:39,549 INFO L295 CegarLoopForPetriNet]: 117 programPoint places, 83 predicate places. [2022-12-12 14:04:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 337 transitions, 1730 flow [2022-12-12 14:04:39,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 337 transitions, 1569 flow, removed 60 selfloop flow, removed 15 redundant places. [2022-12-12 14:04:39,555 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 337 transitions, 1569 flow [2022-12-12 14:04:39,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 109.93023255813954) internal successors, (4727), 43 states have internal predecessors, (4727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 14:04:39,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-12 14:04:39,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-12 14:04:39,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-12 14:04:39,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 14:04:39,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-12 14:04:39,766 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2022-12-12 14:04:39,769 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 14:04:39,769 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 14:04:39,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 02:04:39 BasicIcfg [2022-12-12 14:04:39,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 14:04:39,773 INFO L158 Benchmark]: Toolchain (without parser) took 15748.33ms. Allocated memory was 194.0MB in the beginning and 389.0MB in the end (delta: 195.0MB). Free memory was 168.6MB in the beginning and 317.7MB in the end (delta: -149.1MB). Peak memory consumption was 47.1MB. Max. memory is 8.0GB. [2022-12-12 14:04:39,773 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 171.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 14:04:39,774 INFO L158 Benchmark]: CACSL2BoogieTranslator took 574.23ms. Allocated memory is still 194.0MB. Free memory was 168.5MB in the beginning and 141.9MB in the end (delta: 26.6MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-12-12 14:04:39,774 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.77ms. Allocated memory is still 194.0MB. Free memory was 141.9MB in the beginning and 139.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 14:04:39,774 INFO L158 Benchmark]: Boogie Preprocessor took 33.69ms. Allocated memory is still 194.0MB. Free memory was 139.4MB in the beginning and 137.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 14:04:39,774 INFO L158 Benchmark]: RCFGBuilder took 447.47ms. Allocated memory is still 194.0MB. Free memory was 137.5MB in the beginning and 120.9MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-12-12 14:04:39,775 INFO L158 Benchmark]: TraceAbstraction took 14646.11ms. Allocated memory was 194.0MB in the beginning and 389.0MB in the end (delta: 195.0MB). Free memory was 119.8MB in the beginning and 317.7MB in the end (delta: -197.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 14:04:39,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 171.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 574.23ms. Allocated memory is still 194.0MB. Free memory was 168.5MB in the beginning and 141.9MB in the end (delta: 26.6MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.77ms. Allocated memory is still 194.0MB. Free memory was 141.9MB in the beginning and 139.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.69ms. Allocated memory is still 194.0MB. Free memory was 139.4MB in the beginning and 137.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 447.47ms. Allocated memory is still 194.0MB. Free memory was 137.5MB in the beginning and 120.9MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 14646.11ms. Allocated memory was 194.0MB in the beginning and 389.0MB in the end (delta: 195.0MB). Free memory was 119.8MB in the beginning and 317.7MB in the end (delta: -197.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 919]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.1s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.5s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 497 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 497 mSDsluCounter, 251 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 184 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1297 IncrementalHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 67 mSDtfsCounter, 1297 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1975 GetRequests, 1787 SyntacticMatches, 10 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1569occurred in iteration=10, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 918 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 2431 NumberOfCodeBlocks, 2368 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 3132 ConstructedInterpolants, 76 QuantifiedInterpolants, 13220 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2764 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 667/1408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-12 14:04:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...