./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ca4ad6de5ce46f9737c47ccc55c2628eaef135acf1b94c234f6d96d13f1ccb1 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 09:02:40,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 09:02:40,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 09:02:40,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 09:02:40,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 09:02:40,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 09:02:40,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 09:02:40,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 09:02:40,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 09:02:40,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 09:02:40,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 09:02:40,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 09:02:40,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 09:02:40,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 09:02:40,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 09:02:40,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 09:02:40,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 09:02:40,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 09:02:40,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 09:02:40,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 09:02:40,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 09:02:40,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 09:02:40,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 09:02:40,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 09:02:40,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 09:02:40,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 09:02:40,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 09:02:40,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 09:02:40,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 09:02:40,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 09:02:40,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 09:02:40,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 09:02:40,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 09:02:40,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 09:02:40,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 09:02:40,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 09:02:40,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 09:02:40,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 09:02:40,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 09:02:40,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 09:02:40,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 09:02:40,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 09:02:40,748 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 09:02:40,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 09:02:40,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 09:02:40,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 09:02:40,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 09:02:40,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 09:02:40,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 09:02:40,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 09:02:40,751 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 09:02:40,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 09:02:40,752 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 09:02:40,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 09:02:40,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 09:02:40,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 09:02:40,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 09:02:40,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 09:02:40,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 09:02:40,754 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 09:02:40,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 09:02:40,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 09:02:40,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 09:02:40,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 09:02:40,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 09:02:40,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 09:02:40,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:02:40,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 09:02:40,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 09:02:40,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 09:02:40,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 09:02:40,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 09:02:40,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 09:02:40,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 09:02:40,756 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 09:02:40,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 09:02:40,757 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 09:02:40,757 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ca4ad6de5ce46f9737c47ccc55c2628eaef135acf1b94c234f6d96d13f1ccb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 09:02:41,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 09:02:41,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 09:02:41,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 09:02:41,091 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 09:02:41,091 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 09:02:41,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2023-09-01 09:02:42,309 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 09:02:42,558 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 09:02:42,559 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2023-09-01 09:02:42,568 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607cad572/98f73b8a1bcc4bcca557ed77fcd0bc30/FLAG206dc7132 [2023-09-01 09:02:42,582 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607cad572/98f73b8a1bcc4bcca557ed77fcd0bc30 [2023-09-01 09:02:42,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 09:02:42,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 09:02:42,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 09:02:42,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 09:02:42,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 09:02:42,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:02:42" (1/1) ... [2023-09-01 09:02:42,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1296615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:42, skipping insertion in model container [2023-09-01 09:02:42,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 09:02:42" (1/1) ... [2023-09-01 09:02:42,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 09:02:42,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 09:02:42,944 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2023-09-01 09:02:42,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:02:42,980 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 09:02:43,029 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2023-09-01 09:02:43,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 09:02:43,063 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:02:43,063 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 09:02:43,069 INFO L208 MainTranslator]: Completed translation [2023-09-01 09:02:43,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43 WrapperNode [2023-09-01 09:02:43,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 09:02:43,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 09:02:43,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 09:02:43,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 09:02:43,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,127 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-09-01 09:02:43,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 09:02:43,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 09:02:43,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 09:02:43,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 09:02:43,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 09:02:43,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 09:02:43,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 09:02:43,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 09:02:43,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (1/1) ... [2023-09-01 09:02:43,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 09:02:43,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:43,205 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) [2023-09-01 09:02:43,224 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 [2023-09-01 09:02:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-09-01 09:02:43,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-09-01 09:02:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-09-01 09:02:43,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-09-01 09:02:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 09:02:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 09:02:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 09:02:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 09:02:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 09:02:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 09:02:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 09:02:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 09:02:43,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 09:02:43,248 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 09:02:43,428 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 09:02:43,430 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 09:02:43,627 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 09:02:43,632 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 09:02:43,634 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 09:02:43,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:02:43 BoogieIcfgContainer [2023-09-01 09:02:43,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 09:02:43,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 09:02:43,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 09:02:43,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 09:02:43,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 09:02:42" (1/3) ... [2023-09-01 09:02:43,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fea4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:02:43, skipping insertion in model container [2023-09-01 09:02:43,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 09:02:43" (2/3) ... [2023-09-01 09:02:43,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fea4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 09:02:43, skipping insertion in model container [2023-09-01 09:02:43,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:02:43" (3/3) ... [2023-09-01 09:02:43,644 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2023-09-01 09:02:43,651 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 09:02:43,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 09:02:43,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 09:02:43,659 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 09:02:43,747 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 09:02:43,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-09-01 09:02:43,834 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-09-01 09:02:43,834 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:02:43,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-09-01 09:02:43,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-09-01 09:02:43,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-09-01 09:02:43,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 09:02:43,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-09-01 09:02:43,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-09-01 09:02:43,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-09-01 09:02:43,894 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-09-01 09:02:43,895 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:02:43,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-09-01 09:02:43,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-09-01 09:02:45,719 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-09-01 09:02:45,719 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-09-01 09:02:45,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 09:02:45,737 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b8961aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 09:02:45,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 09:02:45,742 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-09-01 09:02:45,742 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 09:02:45,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:45,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-09-01 09:02:45,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:45,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-09-01 09:02:45,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:45,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098604562] [2023-09-01 09:02:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:45,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098604562] [2023-09-01 09:02:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098604562] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:46,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 09:02:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003276678] [2023-09-01 09:02:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:46,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 09:02:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 09:02:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 09:02:46,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 124 [2023-09-01 09:02:46,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2023-09-01 09:02:46,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:46,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 124 [2023-09-01 09:02:46,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:46,260 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-09-01 09:02:46,260 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 09:02:46,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-09-01 09:02:46,262 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-09-01 09:02:46,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-09-01 09:02:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 09:02:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 09:02:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 245 transitions. [2023-09-01 09:02:46,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939516129032258 [2023-09-01 09:02:46,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 245 transitions. [2023-09-01 09:02:46,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 245 transitions. [2023-09-01 09:02:46,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:46,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 245 transitions. [2023-09-01 09:02:46,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 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) [2023-09-01 09:02:46,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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) [2023-09-01 09:02:46,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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) [2023-09-01 09:02:46,300 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 245 transitions. [2023-09-01 09:02:46,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-09-01 09:02:46,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 09:02:46,304 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-09-01 09:02:46,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-09-01 09:02:46,309 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-09-01 09:02:46,310 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-09-01 09:02:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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) [2023-09-01 09:02:46,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:46,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:46,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 09:02:46,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:46,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-09-01 09:02:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319870109] [2023-09-01 09:02:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:46,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319870109] [2023-09-01 09:02:46,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319870109] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:46,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:46,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:02:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424671400] [2023-09-01 09:02:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:46,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:02:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:02:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:02:46,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:46,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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) [2023-09-01 09:02:46,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:46,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:46,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:46,621 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-09-01 09:02:46,622 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-09-01 09:02:46,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-09-01 09:02:46,624 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-09-01 09:02:46,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-09-01 09:02:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 09:02:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 09:02:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-09-01 09:02:46,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-09-01 09:02:46,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-09-01 09:02:46,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-09-01 09:02:46,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:46,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-09-01 09:02:46,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 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) [2023-09-01 09:02:46,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 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) [2023-09-01 09:02:46,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 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) [2023-09-01 09:02:46,630 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-09-01 09:02:46,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-09-01 09:02:46,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 09:02:46,632 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-09-01 09:02:46,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-09-01 09:02:46,633 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-09-01 09:02:46,633 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-09-01 09:02:46,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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) [2023-09-01 09:02:46,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:46,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:46,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 09:02:46,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:46,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:46,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-09-01 09:02:46,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:46,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919581044] [2023-09-01 09:02:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:46,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:46,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:46,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919581044] [2023-09-01 09:02:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919581044] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:46,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:46,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 09:02:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094499715] [2023-09-01 09:02:46,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 09:02:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 09:02:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-09-01 09:02:46,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:46,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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) [2023-09-01 09:02:46,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:46,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:46,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:46,898 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-09-01 09:02:46,899 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2023-09-01 09:02:46,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 683 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-09-01 09:02:46,904 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-09-01 09:02:46,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-09-01 09:02:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 09:02:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 09:02:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-09-01 09:02:46,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2023-09-01 09:02:46,907 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-09-01 09:02:46,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-09-01 09:02:46,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:46,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-09-01 09:02:46,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 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) [2023-09-01 09:02:46,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-09-01 09:02:46,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-09-01 09:02:46,911 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 413 transitions. [2023-09-01 09:02:46,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-09-01 09:02:46,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 09:02:46,916 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-09-01 09:02:46,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-09-01 09:02:46,917 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-09-01 09:02:46,921 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-09-01 09:02:46,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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) [2023-09-01 09:02:46,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:46,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:46,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 09:02:46,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:46,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 1 times [2023-09-01 09:02:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319963733] [2023-09-01 09:02:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319963733] [2023-09-01 09:02:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319963733] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:47,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:47,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:02:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830807384] [2023-09-01 09:02:47,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:47,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 09:02:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 09:02:47,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 09:02:47,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:47,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 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) [2023-09-01 09:02:47,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:47,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:47,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:47,209 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-09-01 09:02:47,209 INFO L131 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2023-09-01 09:02:47,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 940 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-09-01 09:02:47,211 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-09-01 09:02:47,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-09-01 09:02:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 09:02:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 09:02:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-09-01 09:02:47,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737903225806452 [2023-09-01 09:02:47,214 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-09-01 09:02:47,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-09-01 09:02:47,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:47,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-09-01 09:02:47,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 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) [2023-09-01 09:02:47,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 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) [2023-09-01 09:02:47,217 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 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) [2023-09-01 09:02:47,218 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 470 transitions. [2023-09-01 09:02:47,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-09-01 09:02:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-09-01 09:02:47,223 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-09-01 09:02:47,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-09-01 09:02:47,224 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-09-01 09:02:47,224 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-09-01 09:02:47,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 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) [2023-09-01 09:02:47,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:47,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 09:02:47,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:47,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 2 times [2023-09-01 09:02:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413069237] [2023-09-01 09:02:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:47,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:47,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413069237] [2023-09-01 09:02:47,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413069237] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 09:02:47,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 09:02:47,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 09:02:47,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122526086] [2023-09-01 09:02:47,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 09:02:47,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 09:02:47,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:47,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 09:02:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-09-01 09:02:47,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:47,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 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) [2023-09-01 09:02:47,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:47,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:47,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:47,444 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2023-09-01 09:02:47,445 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-09-01 09:02:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 926 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-09-01 09:02:47,447 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-09-01 09:02:47,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-09-01 09:02:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 09:02:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 09:02:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 411 transitions. [2023-09-01 09:02:47,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735023041474654 [2023-09-01 09:02:47,449 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 411 transitions. [2023-09-01 09:02:47,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 411 transitions. [2023-09-01 09:02:47,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:47,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 411 transitions. [2023-09-01 09:02:47,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 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) [2023-09-01 09:02:47,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-09-01 09:02:47,452 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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) [2023-09-01 09:02:47,452 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 411 transitions. [2023-09-01 09:02:47,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-09-01 09:02:47,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-09-01 09:02:47,459 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-09-01 09:02:47,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-09-01 09:02:47,460 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-09-01 09:02:47,460 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-09-01 09:02:47,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 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) [2023-09-01 09:02:47,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:47,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:47,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 09:02:47,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:47,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:47,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1494024432, now seen corresponding path program 3 times [2023-09-01 09:02:47,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:47,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025618810] [2023-09-01 09:02:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:47,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:47,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:47,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025618810] [2023-09-01 09:02:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025618810] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:47,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335715538] [2023-09-01 09:02:47,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 09:02:47,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:47,553 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) [2023-09-01 09:02:47,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 09:02:47,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 09:02:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:02:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 09:02:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:47,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:47,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335715538] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:47,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:47,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 09:02:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109734446] [2023-09-01 09:02:47,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:47,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 09:02:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 09:02:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 09:02:47,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:47,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 54.916666666666664) internal successors, (659), 12 states have internal predecessors, (659), 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) [2023-09-01 09:02:47,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:47,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:48,227 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2023-09-01 09:02:48,227 INFO L131 PetriNetUnfolder]: For 2187/2187 co-relation queries the response was YES. [2023-09-01 09:02:48,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2187/2187 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1213 event pairs, 10 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-09-01 09:02:48,229 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 36 selfloop transitions, 38 changer transitions 26/100 dead transitions. [2023-09-01 09:02:48,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 992 flow [2023-09-01 09:02:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 09:02:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 09:02:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 935 transitions. [2023-09-01 09:02:48,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47127016129032256 [2023-09-01 09:02:48,233 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 935 transitions. [2023-09-01 09:02:48,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 935 transitions. [2023-09-01 09:02:48,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:48,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 935 transitions. [2023-09-01 09:02:48,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.4375) internal successors, (935), 16 states have internal predecessors, (935), 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) [2023-09-01 09:02:48,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 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) [2023-09-01 09:02:48,238 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 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) [2023-09-01 09:02:48,239 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 16 states and 935 transitions. [2023-09-01 09:02:48,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 992 flow [2023-09-01 09:02:48,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 927 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-09-01 09:02:48,246 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 705 flow [2023-09-01 09:02:48,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=705, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-09-01 09:02:48,247 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 49 predicate places. [2023-09-01 09:02:48,247 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 705 flow [2023-09-01 09:02:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.916666666666664) internal successors, (659), 12 states have internal predecessors, (659), 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) [2023-09-01 09:02:48,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:48,248 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:48,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 09:02:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-09-01 09:02:48,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:48,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 976616748, now seen corresponding path program 4 times [2023-09-01 09:02:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352469211] [2023-09-01 09:02:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:48,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352469211] [2023-09-01 09:02:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352469211] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791113016] [2023-09-01 09:02:48,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 09:02:48,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:48,609 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) [2023-09-01 09:02:48,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 09:02:48,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 09:02:48,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:02:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 09:02:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:48,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:48,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791113016] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:48,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:48,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 09:02:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134925214] [2023-09-01 09:02:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:48,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 09:02:48,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 09:02:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-09-01 09:02:48,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:48,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 705 flow. Second operand has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 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) [2023-09-01 09:02:48,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:48,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:49,222 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2023-09-01 09:02:49,222 INFO L131 PetriNetUnfolder]: For 4314/4314 co-relation queries the response was YES. [2023-09-01 09:02:49,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 463 events. 258/463 cut-off events. For 4314/4314 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1636 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2419. Up to 237 conditions per place. [2023-09-01 09:02:49,226 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-09-01 09:02:49,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 1473 flow [2023-09-01 09:02:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 09:02:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 09:02:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-09-01 09:02:49,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692540322580645 [2023-09-01 09:02:49,229 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-09-01 09:02:49,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-09-01 09:02:49,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:49,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-09-01 09:02:49,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 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) [2023-09-01 09:02:49,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 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) [2023-09-01 09:02:49,235 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 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) [2023-09-01 09:02:49,235 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 705 flow. Second operand 16 states and 931 transitions. [2023-09-01 09:02:49,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 1473 flow [2023-09-01 09:02:49,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1098 flow, removed 170 selfloop flow, removed 7 redundant places. [2023-09-01 09:02:49,248 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 769 flow [2023-09-01 09:02:49,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=769, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-09-01 09:02:49,249 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-09-01 09:02:49,249 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 769 flow [2023-09-01 09:02:49,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 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) [2023-09-01 09:02:49,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:49,250 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:49,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 09:02:49,456 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,SelfDestructingSolverStorable6 [2023-09-01 09:02:49,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:49,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 921314670, now seen corresponding path program 5 times [2023-09-01 09:02:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:49,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504659947] [2023-09-01 09:02:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504659947] [2023-09-01 09:02:49,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504659947] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:49,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339054452] [2023-09-01 09:02:49,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 09:02:49,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:49,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:49,585 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) [2023-09-01 09:02:49,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 09:02:49,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 09:02:49,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:02:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 09:02:49,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:49,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339054452] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:49,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:49,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 09:02:49,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108277354] [2023-09-01 09:02:49,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:49,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 09:02:49,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:49,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 09:02:49,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-09-01 09:02:49,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:49,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 769 flow. Second operand has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 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) [2023-09-01 09:02:49,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:49,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:49,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:50,427 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2023-09-01 09:02:50,427 INFO L131 PetriNetUnfolder]: For 12085/12085 co-relation queries the response was YES. [2023-09-01 09:02:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 755 events. 412/755 cut-off events. For 12085/12085 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3331 event pairs, 44 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3958. Up to 227 conditions per place. [2023-09-01 09:02:50,432 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-09-01 09:02:50,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2087 flow [2023-09-01 09:02:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 09:02:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 09:02:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-09-01 09:02:50,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46920821114369504 [2023-09-01 09:02:50,436 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-09-01 09:02:50,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-09-01 09:02:50,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:50,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-09-01 09:02:50,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.18181818181818) internal successors, (1280), 22 states have internal predecessors, (1280), 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) [2023-09-01 09:02:50,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 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) [2023-09-01 09:02:50,445 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 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) [2023-09-01 09:02:50,445 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 769 flow. Second operand 22 states and 1280 transitions. [2023-09-01 09:02:50,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2087 flow [2023-09-01 09:02:50,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1966 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-09-01 09:02:50,472 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1476 flow [2023-09-01 09:02:50,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1476, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-09-01 09:02:50,475 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-09-01 09:02:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1476 flow [2023-09-01 09:02:50,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 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) [2023-09-01 09:02:50,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:50,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:50,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 09:02:50,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:50,684 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:50,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1348517036, now seen corresponding path program 6 times [2023-09-01 09:02:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802067943] [2023-09-01 09:02:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:50,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802067943] [2023-09-01 09:02:50,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802067943] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273314144] [2023-09-01 09:02:50,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 09:02:50,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:50,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:50,789 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) [2023-09-01 09:02:50,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 09:02:50,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 09:02:50,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 09:02:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 09:02:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 09:02:51,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273314144] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:51,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:51,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-09-01 09:02:51,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077449983] [2023-09-01 09:02:51,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:51,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 09:02:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:51,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 09:02:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-09-01 09:02:51,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:51,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1476 flow. Second operand has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 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) [2023-09-01 09:02:51,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:51,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:51,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:51,698 INFO L130 PetriNetUnfolder]: 576/1035 cut-off events. [2023-09-01 09:02:51,698 INFO L131 PetriNetUnfolder]: For 31794/31794 co-relation queries the response was YES. [2023-09-01 09:02:51,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 1035 events. 576/1035 cut-off events. For 31794/31794 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4812 event pairs, 20 based on Foata normal form. 32/1067 useless extension candidates. Maximal degree in co-relation 7098. Up to 327 conditions per place. [2023-09-01 09:02:51,708 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 61 selfloop transitions, 128 changer transitions 48/237 dead transitions. [2023-09-01 09:02:51,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 237 transitions, 3592 flow [2023-09-01 09:02:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 09:02:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 09:02:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1571 transitions. [2023-09-01 09:02:51,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692353643966547 [2023-09-01 09:02:51,713 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1571 transitions. [2023-09-01 09:02:51,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1571 transitions. [2023-09-01 09:02:51,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:51,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1571 transitions. [2023-09-01 09:02:51,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.18518518518518) internal successors, (1571), 27 states have internal predecessors, (1571), 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) [2023-09-01 09:02:51,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 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) [2023-09-01 09:02:51,722 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 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) [2023-09-01 09:02:51,723 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1476 flow. Second operand 27 states and 1571 transitions. [2023-09-01 09:02:51,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 237 transitions, 3592 flow [2023-09-01 09:02:51,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 237 transitions, 3297 flow, removed 139 selfloop flow, removed 4 redundant places. [2023-09-01 09:02:51,785 INFO L231 Difference]: Finished difference. Result has 153 places, 150 transitions, 2479 flow [2023-09-01 09:02:51,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2479, PETRI_PLACES=153, PETRI_TRANSITIONS=150} [2023-09-01 09:02:51,786 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-09-01 09:02:51,786 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 150 transitions, 2479 flow [2023-09-01 09:02:51,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.76470588235294) internal successors, (931), 17 states have internal predecessors, (931), 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) [2023-09-01 09:02:51,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:51,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:51,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 09:02:51,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:51,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:51,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1293813567, now seen corresponding path program 7 times [2023-09-01 09:02:51,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:51,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826660456] [2023-09-01 09:02:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:51,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 09:02:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826660456] [2023-09-01 09:02:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826660456] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 09:02:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736620817] [2023-09-01 09:02:52,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 09:02:52,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 09:02:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 09:02:52,179 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) [2023-09-01 09:02:52,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 09:02:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 09:02:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 09:02:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 09:02:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:52,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 09:02:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 09:02:52,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736620817] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 09:02:52,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 09:02:52,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-09-01 09:02:52,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046053678] [2023-09-01 09:02:52,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 09:02:52,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 09:02:52,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 09:02:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 09:02:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-09-01 09:02:52,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 124 [2023-09-01 09:02:52,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 150 transitions, 2479 flow. Second operand has 15 states, 15 states have (on average 54.333333333333336) internal successors, (815), 15 states have internal predecessors, (815), 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) [2023-09-01 09:02:52,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 09:02:52,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 124 [2023-09-01 09:02:52,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 09:02:52,913 INFO L130 PetriNetUnfolder]: 628/1123 cut-off events. [2023-09-01 09:02:52,914 INFO L131 PetriNetUnfolder]: For 47266/47266 co-relation queries the response was YES. [2023-09-01 09:02:52,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 1123 events. 628/1123 cut-off events. For 47266/47266 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5228 event pairs, 40 based on Foata normal form. 4/1127 useless extension candidates. Maximal degree in co-relation 9440. Up to 350 conditions per place. [2023-09-01 09:02:52,927 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 65 selfloop transitions, 124 changer transitions 34/223 dead transitions. [2023-09-01 09:02:52,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 223 transitions, 4225 flow [2023-09-01 09:02:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 09:02:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 09:02:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1158 transitions. [2023-09-01 09:02:52,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669354838709677 [2023-09-01 09:02:52,930 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1158 transitions. [2023-09-01 09:02:52,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1158 transitions. [2023-09-01 09:02:52,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 09:02:52,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1158 transitions. [2023-09-01 09:02:52,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.9) internal successors, (1158), 20 states have internal predecessors, (1158), 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) [2023-09-01 09:02:52,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 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) [2023-09-01 09:02:52,937 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 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) [2023-09-01 09:02:52,937 INFO L175 Difference]: Start difference. First operand has 153 places, 150 transitions, 2479 flow. Second operand 20 states and 1158 transitions. [2023-09-01 09:02:52,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 223 transitions, 4225 flow [2023-09-01 09:02:53,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 223 transitions, 3254 flow, removed 460 selfloop flow, removed 10 redundant places. [2023-09-01 09:02:53,082 INFO L231 Difference]: Finished difference. Result has 170 places, 166 transitions, 2520 flow [2023-09-01 09:02:53,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2520, PETRI_PLACES=170, PETRI_TRANSITIONS=166} [2023-09-01 09:02:53,083 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 152 predicate places. [2023-09-01 09:02:53,083 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 166 transitions, 2520 flow [2023-09-01 09:02:53,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.333333333333336) internal successors, (815), 15 states have internal predecessors, (815), 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) [2023-09-01 09:02:53,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 09:02:53,083 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 09:02:53,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 09:02:53,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 09:02:53,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 09:02:53,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 09:02:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -911169057, now seen corresponding path program 8 times [2023-09-01 09:02:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 09:02:53,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58862618] [2023-09-01 09:02:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 09:02:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 09:02:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:02:53,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 09:02:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 09:02:53,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 09:02:53,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 09:02:53,348 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 09:02:53,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 09:02:53,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 09:02:53,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 09:02:53,350 INFO L445 BasicCegarLoop]: Path program histogram: [8, 2, 1] [2023-09-01 09:02:53,354 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 09:02:53,354 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 09:02:53,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 09:02:53 BasicIcfg [2023-09-01 09:02:53,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 09:02:53,392 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 09:02:53,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 09:02:53,392 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 09:02:53,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 09:02:43" (3/4) ... [2023-09-01 09:02:53,394 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-09-01 09:02:53,447 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 09:02:53,448 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 09:02:53,448 INFO L158 Benchmark]: Toolchain (without parser) took 10862.46ms. Allocated memory was 65.0MB in the beginning and 146.8MB in the end (delta: 81.8MB). Free memory was 41.2MB in the beginning and 75.3MB in the end (delta: -34.1MB). Peak memory consumption was 50.1MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,449 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory was 42.4MB in the beginning and 42.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 09:02:53,449 INFO L158 Benchmark]: CACSL2BoogieTranslator took 483.35ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 41.0MB in the beginning and 55.7MB in the end (delta: -14.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,449 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.67ms. Allocated memory is still 83.9MB. Free memory was 55.7MB in the beginning and 53.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,449 INFO L158 Benchmark]: Boogie Preprocessor took 44.30ms. Allocated memory is still 83.9MB. Free memory was 53.6MB in the beginning and 52.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,450 INFO L158 Benchmark]: RCFGBuilder took 462.73ms. Allocated memory is still 83.9MB. Free memory was 52.3MB in the beginning and 40.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,450 INFO L158 Benchmark]: TraceAbstraction took 9752.89ms. Allocated memory was 83.9MB in the beginning and 146.8MB in the end (delta: 62.9MB). Free memory was 39.3MB in the beginning and 80.5MB in the end (delta: -41.3MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,450 INFO L158 Benchmark]: Witness Printer took 56.30ms. Allocated memory is still 146.8MB. Free memory was 80.5MB in the beginning and 75.3MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-09-01 09:02:53,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 65.0MB. Free memory was 42.4MB in the beginning and 42.4MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 483.35ms. Allocated memory was 65.0MB in the beginning and 83.9MB in the end (delta: 18.9MB). Free memory was 41.0MB in the beginning and 55.7MB in the end (delta: -14.6MB). Peak memory consumption was 14.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.67ms. Allocated memory is still 83.9MB. Free memory was 55.7MB in the beginning and 53.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.30ms. Allocated memory is still 83.9MB. Free memory was 53.6MB in the beginning and 52.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 462.73ms. Allocated memory is still 83.9MB. Free memory was 52.3MB in the beginning and 40.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9752.89ms. Allocated memory was 83.9MB in the beginning and 146.8MB in the end (delta: 62.9MB). Free memory was 39.3MB in the beginning and 80.5MB in the end (delta: -41.3MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. * Witness Printer took 56.30ms. Allocated memory is still 146.8MB. Free memory was 80.5MB in the beginning and 75.3MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=5, k=5] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.6s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1238 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1181 mSDsluCounter, 214 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 200 mSDsCounter, 157 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1802 IncrementalHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 157 mSolverCounterUnsat, 14 mSDtfsCounter, 1802 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 276 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2520occurred in iteration=10, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 200 NumberOfCodeBlocks, 200 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 232 ConstructedInterpolants, 0 QuantifiedInterpolants, 996 SizeOfPredicates, 27 NumberOfNonLiveVariables, 700 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 9/114 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 RESULT: Ultimate proved your program to be incorrect! [2023-09-01 09:02:53,480 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE