./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c --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/weaver/parallel-misc-3.wvr.c -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 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 --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 12:44:27,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:44:27,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:44:27,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:44:27,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:44:27,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:44:27,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:44:27,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:44:27,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:44:27,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:44:27,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:44:27,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:44:27,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:44:27,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:44:27,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:44:27,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:44:27,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:44:27,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:44:27,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:44:27,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:44:27,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:44:27,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:44:27,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:44:27,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:44:27,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:44:27,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:44:27,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:44:27,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:44:27,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:44:27,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:44:27,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:44:27,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:44:27,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:44:27,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:44:27,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:44:27,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:44:27,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:44:27,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:44:27,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:44:27,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:44:27,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:44:27,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:44:27,845 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:44:27,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:44:27,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:44:27,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:44:27,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:44:27,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:44:27,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:44:27,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:44:27,849 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:44:27,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:44:27,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:44:27,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:44:27,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:44:27,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:44:27,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:44:27,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:44:27,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:44:27,851 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:44:27,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:44:27,851 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:44:27,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:44:27,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:44:27,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:44:27,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:44:27,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:44:27,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:44:27,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:44:27,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:44:27,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:44:27,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:44:27,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:44:27,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:44:27,854 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:44:27,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:44:27,855 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:44:27,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3c959108026afa89c4d07543133cda81a16d409ef9b7609f190c1caa51d799 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:44:28,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:44:28,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:44:28,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:44:28,157 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:44:28,158 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:44:28,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-09-01 12:44:29,327 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:44:29,527 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:44:29,528 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-09-01 12:44:29,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8280cf1/dcafa24d221242bba7473e32bc681765/FLAG51b91e348 [2023-09-01 12:44:29,554 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af8280cf1/dcafa24d221242bba7473e32bc681765 [2023-09-01 12:44:29,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:44:29,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:44:29,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:44:29,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:44:29,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:44:29,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd210ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29, skipping insertion in model container [2023-09-01 12:44:29,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:44:29,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:44:29,729 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c[2410,2423] [2023-09-01 12:44:29,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:44:29,744 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:44:29,774 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c[2410,2423] [2023-09-01 12:44:29,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:44:29,785 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:44:29,785 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:44:29,791 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:44:29,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29 WrapperNode [2023-09-01 12:44:29,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:44:29,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:44:29,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:44:29,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:44:29,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,833 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-09-01 12:44:29,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:44:29,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:44:29,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:44:29,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:44:29,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:44:29,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:44:29,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:44:29,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:44:29,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (1/1) ... [2023-09-01 12:44:29,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:44:29,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:29,898 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 12:44:29,924 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 12:44:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:44:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:44:29,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:44:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:44:29,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:44:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:44:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:44:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:44:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:44:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:44:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:44:29,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:44:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:44:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:44:29,942 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 12:44:30,043 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:44:30,046 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:44:30,245 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:44:30,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:44:30,281 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 12:44:30,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:30 BoogieIcfgContainer [2023-09-01 12:44:30,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:44:30,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:44:30,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:44:30,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:44:30,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:44:29" (1/3) ... [2023-09-01 12:44:30,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddcdffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:44:30, skipping insertion in model container [2023-09-01 12:44:30,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:44:29" (2/3) ... [2023-09-01 12:44:30,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ddcdffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:44:30, skipping insertion in model container [2023-09-01 12:44:30,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:30" (3/3) ... [2023-09-01 12:44:30,288 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2023-09-01 12:44:30,294 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:44:30,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:44:30,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:44:30,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:44:30,360 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:44:30,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 92 transitions, 200 flow [2023-09-01 12:44:30,433 INFO L130 PetriNetUnfolder]: 11/90 cut-off events. [2023-09-01 12:44:30,433 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:44:30,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 11/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 104 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-09-01 12:44:30,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 92 transitions, 200 flow [2023-09-01 12:44:30,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 82 transitions, 176 flow [2023-09-01 12:44:30,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:44:30,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 82 transitions, 176 flow [2023-09-01 12:44:30,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 82 transitions, 176 flow [2023-09-01 12:44:30,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 82 transitions, 176 flow [2023-09-01 12:44:30,475 INFO L130 PetriNetUnfolder]: 11/82 cut-off events. [2023-09-01 12:44:30,475 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:44:30,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 11/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-09-01 12:44:30,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-09-01 12:44:33,097 INFO L134 LiptonReduction]: Checked pairs total: 1141 [2023-09-01 12:44:33,097 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-09-01 12:44:33,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:44:33,116 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;@64d2943c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:44:33,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:44:33,120 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-09-01 12:44:33,121 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:44:33,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:33,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:33,122 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 12:44:33,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:33,126 INFO L85 PathProgramCache]: Analyzing trace with hash 941425486, now seen corresponding path program 1 times [2023-09-01 12:44:33,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:33,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855245308] [2023-09-01 12:44:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:33,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:33,417 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 12:44:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:33,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855245308] [2023-09-01 12:44:33,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855245308] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:33,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:33,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:44:33,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970374459] [2023-09-01 12:44:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:33,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:44:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:44:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:44:33,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 173 [2023-09-01 12:44:33,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 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 12:44:33,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:33,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 173 [2023-09-01 12:44:33,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:33,518 INFO L130 PetriNetUnfolder]: 29/54 cut-off events. [2023-09-01 12:44:33,518 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 12:44:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 54 events. 29/54 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 1 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 90. Up to 45 conditions per place. [2023-09-01 12:44:33,520 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 17 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-09-01 12:44:33,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 19 transitions, 91 flow [2023-09-01 12:44:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:44:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:44:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-09-01 12:44:33,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48940269749518306 [2023-09-01 12:44:33,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-09-01 12:44:33,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-09-01 12:44:33,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:33,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-09-01 12:44:33,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 12:44:33,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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 12:44:33,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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 12:44:33,557 INFO L175 Difference]: Start difference. First operand has 18 places, 13 transitions, 38 flow. Second operand 3 states and 254 transitions. [2023-09-01 12:44:33,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 19 transitions, 91 flow [2023-09-01 12:44:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 19 transitions, 81 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:44:33,560 INFO L231 Difference]: Finished difference. Result has 17 places, 14 transitions, 42 flow [2023-09-01 12:44:33,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=17, PETRI_TRANSITIONS=14} [2023-09-01 12:44:33,565 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-09-01 12:44:33,565 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 14 transitions, 42 flow [2023-09-01 12:44:33,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 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 12:44:33,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:33,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:44:33,570 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 12:44:33,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash 789177524, now seen corresponding path program 1 times [2023-09-01 12:44:33,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:33,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386851782] [2023-09-01 12:44:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:33,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:33,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386851782] [2023-09-01 12:44:33,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386851782] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:44:33,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:44:33,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 12:44:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069324203] [2023-09-01 12:44:33,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:44:33,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:44:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:44:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:44:33,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 173 [2023-09-01 12:44:33,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 14 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 12:44:33,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:33,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 173 [2023-09-01 12:44:33,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:33,725 INFO L130 PetriNetUnfolder]: 40/73 cut-off events. [2023-09-01 12:44:33,726 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 12:44:33,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 73 events. 40/73 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 139 event pairs, 6 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 112. Up to 49 conditions per place. [2023-09-01 12:44:33,727 INFO L137 encePairwiseOnDemand]: 170/173 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-09-01 12:44:33,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 21 transitions, 106 flow [2023-09-01 12:44:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:44:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:44:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-09-01 12:44:33,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48940269749518306 [2023-09-01 12:44:33,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-09-01 12:44:33,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-09-01 12:44:33,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:33,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-09-01 12:44:33,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 12:44:33,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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 12:44:33,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 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 12:44:33,737 INFO L175 Difference]: Start difference. First operand has 17 places, 14 transitions, 42 flow. Second operand 3 states and 254 transitions. [2023-09-01 12:44:33,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 21 transitions, 106 flow [2023-09-01 12:44:33,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:44:33,738 INFO L231 Difference]: Finished difference. Result has 19 places, 15 transitions, 52 flow [2023-09-01 12:44:33,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=19, PETRI_TRANSITIONS=15} [2023-09-01 12:44:33,739 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-09-01 12:44:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 15 transitions, 52 flow [2023-09-01 12:44:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 12:44:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:33,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:44:33,741 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 12:44:33,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1336220021, now seen corresponding path program 1 times [2023-09-01 12:44:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924705357] [2023-09-01 12:44:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:34,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:34,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924705357] [2023-09-01 12:44:34,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924705357] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:34,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888414624] [2023-09-01 12:44:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:34,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:34,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:34,089 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 12:44:34,112 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 12:44:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 12:44:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:34,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888414624] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:34,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:34,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2023-09-01 12:44:34,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143609644] [2023-09-01 12:44:34,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:34,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:44:34,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:44:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:44:34,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 173 [2023-09-01 12:44:34,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 52 flow. Second operand has 8 states, 8 states have (on average 68.5) internal successors, (548), 8 states have internal predecessors, (548), 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 12:44:34,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:34,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 173 [2023-09-01 12:44:34,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:35,087 INFO L130 PetriNetUnfolder]: 61/110 cut-off events. [2023-09-01 12:44:35,087 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-09-01 12:44:35,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 110 events. 61/110 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 253 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 84. Up to 45 conditions per place. [2023-09-01 12:44:35,089 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 36 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2023-09-01 12:44:35,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 47 transitions, 245 flow [2023-09-01 12:44:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:44:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:44:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2023-09-01 12:44:35,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40895953757225434 [2023-09-01 12:44:35,093 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2023-09-01 12:44:35,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2023-09-01 12:44:35,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:35,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2023-09-01 12:44:35,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 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 12:44:35,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 173.0) internal successors, (1557), 9 states have internal predecessors, (1557), 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 12:44:35,116 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 173.0) internal successors, (1557), 9 states have internal predecessors, (1557), 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 12:44:35,116 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 52 flow. Second operand 8 states and 566 transitions. [2023-09-01 12:44:35,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 47 transitions, 245 flow [2023-09-01 12:44:35,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 47 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:44:35,118 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 125 flow [2023-09-01 12:44:35,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=125, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-09-01 12:44:35,119 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 10 predicate places. [2023-09-01 12:44:35,119 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 125 flow [2023-09-01 12:44:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.5) internal successors, (548), 8 states have internal predecessors, (548), 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 12:44:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:35,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:44:35,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:35,325 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 12:44:35,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 728758898, now seen corresponding path program 2 times [2023-09-01 12:44:35,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:35,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550816038] [2023-09-01 12:44:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:44:35,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550816038] [2023-09-01 12:44:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550816038] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933738651] [2023-09-01 12:44:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:44:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:35,523 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 12:44:35,544 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 12:44:35,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:44:35,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:44:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:44:35,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933738651] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:36,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:36,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6] total 10 [2023-09-01 12:44:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838509671] [2023-09-01 12:44:36,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:36,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:44:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:44:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:44:36,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 173 [2023-09-01 12:44:36,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 125 flow. Second operand has 11 states, 11 states have (on average 60.90909090909091) internal successors, (670), 11 states have internal predecessors, (670), 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 12:44:36,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:36,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 173 [2023-09-01 12:44:36,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:36,448 INFO L130 PetriNetUnfolder]: 91/170 cut-off events. [2023-09-01 12:44:36,448 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-09-01 12:44:36,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 170 events. 91/170 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 483 event pairs, 2 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 257. Up to 67 conditions per place. [2023-09-01 12:44:36,450 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 41 selfloop transitions, 26 changer transitions 0/67 dead transitions. [2023-09-01 12:44:36,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 67 transitions, 436 flow [2023-09-01 12:44:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 12:44:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 12:44:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 820 transitions. [2023-09-01 12:44:36,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36460649177412185 [2023-09-01 12:44:36,454 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 820 transitions. [2023-09-01 12:44:36,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 820 transitions. [2023-09-01 12:44:36,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:36,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 820 transitions. [2023-09-01 12:44:36,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.07692307692308) internal successors, (820), 13 states have internal predecessors, (820), 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 12:44:36,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 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 12:44:36,461 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 173.0) internal successors, (2422), 14 states have internal predecessors, (2422), 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 12:44:36,461 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 125 flow. Second operand 13 states and 820 transitions. [2023-09-01 12:44:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 67 transitions, 436 flow [2023-09-01 12:44:36,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 67 transitions, 382 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-09-01 12:44:36,464 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 285 flow [2023-09-01 12:44:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=285, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-09-01 12:44:36,465 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 26 predicate places. [2023-09-01 12:44:36,465 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 285 flow [2023-09-01 12:44:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 60.90909090909091) internal successors, (670), 11 states have internal predecessors, (670), 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 12:44:36,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:36,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:36,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:44:36,671 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,SelfDestructingSolverStorable3 [2023-09-01 12:44:36,672 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 12:44:36,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash 793394256, now seen corresponding path program 3 times [2023-09-01 12:44:36,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:36,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904635415] [2023-09-01 12:44:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:37,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:37,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904635415] [2023-09-01 12:44:37,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904635415] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764707649] [2023-09-01 12:44:37,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:44:37,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:37,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:37,263 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 12:44:37,292 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 12:44:37,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:44:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:44:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:37,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 12:44:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764707649] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:38,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:38,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-09-01 12:44:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090767802] [2023-09-01 12:44:38,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:44:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:44:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:44:38,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 173 [2023-09-01 12:44:38,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 285 flow. Second operand has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 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 12:44:38,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:38,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 173 [2023-09-01 12:44:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:39,008 INFO L130 PetriNetUnfolder]: 194/365 cut-off events. [2023-09-01 12:44:39,008 INFO L131 PetriNetUnfolder]: For 838/838 co-relation queries the response was YES. [2023-09-01 12:44:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 365 events. 194/365 cut-off events. For 838/838 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1432 event pairs, 4 based on Foata normal form. 10/375 useless extension candidates. Maximal degree in co-relation 1022. Up to 103 conditions per place. [2023-09-01 12:44:39,012 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 50 selfloop transitions, 54 changer transitions 30/134 dead transitions. [2023-09-01 12:44:39,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 134 transitions, 1100 flow [2023-09-01 12:44:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:44:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:44:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1201 transitions. [2023-09-01 12:44:39,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3471098265895954 [2023-09-01 12:44:39,021 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1201 transitions. [2023-09-01 12:44:39,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1201 transitions. [2023-09-01 12:44:39,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:39,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1201 transitions. [2023-09-01 12:44:39,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.05) internal successors, (1201), 20 states have internal predecessors, (1201), 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 12:44:39,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 173.0) internal successors, (3633), 21 states have internal predecessors, (3633), 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 12:44:39,029 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 173.0) internal successors, (3633), 21 states have internal predecessors, (3633), 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 12:44:39,030 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 285 flow. Second operand 20 states and 1201 transitions. [2023-09-01 12:44:39,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 134 transitions, 1100 flow [2023-09-01 12:44:39,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 134 transitions, 1000 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-09-01 12:44:39,037 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 670 flow [2023-09-01 12:44:39,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=670, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-09-01 12:44:39,038 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 45 predicate places. [2023-09-01 12:44:39,038 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 670 flow [2023-09-01 12:44:39,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 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 12:44:39,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:44:39,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:44:39,047 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 12:44:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:39,244 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 12:44:39,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:44:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2120211330, now seen corresponding path program 4 times [2023-09-01 12:44:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:44:39,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509094110] [2023-09-01 12:44:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:44:39,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:44:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:44:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:44:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509094110] [2023-09-01 12:44:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509094110] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:44:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882606811] [2023-09-01 12:44:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:44:39,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:44:39,792 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 12:44:39,818 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 12:44:39,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:44:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:44:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 12:44:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:44:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:40,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:44:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:44:40,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882606811] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:44:40,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:44:40,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-09-01 12:44:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761846891] [2023-09-01 12:44:40,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:44:40,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 12:44:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:44:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 12:44:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-09-01 12:44:40,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 173 [2023-09-01 12:44:40,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 670 flow. Second operand has 18 states, 18 states have (on average 58.166666666666664) internal successors, (1047), 18 states have internal predecessors, (1047), 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 12:44:40,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:44:40,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 173 [2023-09-01 12:44:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:44:41,258 INFO L130 PetriNetUnfolder]: 130/236 cut-off events. [2023-09-01 12:44:41,259 INFO L131 PetriNetUnfolder]: For 761/761 co-relation queries the response was YES. [2023-09-01 12:44:41,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 236 events. 130/236 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 769 event pairs, 0 based on Foata normal form. 19/255 useless extension candidates. Maximal degree in co-relation 1197. Up to 73 conditions per place. [2023-09-01 12:44:41,260 INFO L137 encePairwiseOnDemand]: 167/173 looper letters, 0 selfloop transitions, 0 changer transitions 86/86 dead transitions. [2023-09-01 12:44:41,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 875 flow [2023-09-01 12:44:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 12:44:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 12:44:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 607 transitions. [2023-09-01 12:44:41,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3508670520231214 [2023-09-01 12:44:41,263 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 607 transitions. [2023-09-01 12:44:41,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 607 transitions. [2023-09-01 12:44:41,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:44:41,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 607 transitions. [2023-09-01 12:44:41,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.7) internal successors, (607), 10 states have internal predecessors, (607), 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 12:44:41,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 173.0) internal successors, (1903), 11 states have internal predecessors, (1903), 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 12:44:41,268 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 173.0) internal successors, (1903), 11 states have internal predecessors, (1903), 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 12:44:41,269 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 670 flow. Second operand 10 states and 607 transitions. [2023-09-01 12:44:41,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 875 flow [2023-09-01 12:44:41,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 693 flow, removed 60 selfloop flow, removed 9 redundant places. [2023-09-01 12:44:41,275 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-09-01 12:44:41,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-09-01 12:44:41,277 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 37 predicate places. [2023-09-01 12:44:41,278 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-09-01 12:44:41,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.166666666666664) internal successors, (1047), 18 states have internal predecessors, (1047), 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 12:44:41,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-09-01 12:44:41,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-09-01 12:44:41,281 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-09-01 12:44:41,289 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 12:44:41,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:44:41,489 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-09-01 12:44:41,491 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 12:44:41,492 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 12:44:41,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:44:41 BasicIcfg [2023-09-01 12:44:41,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 12:44:41,495 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 12:44:41,495 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 12:44:41,495 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 12:44:41,495 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:44:30" (3/4) ... [2023-09-01 12:44:41,498 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 12:44:41,502 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-09-01 12:44:41,502 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-09-01 12:44:41,505 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-09-01 12:44:41,505 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-09-01 12:44:41,505 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-09-01 12:44:41,505 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-09-01 12:44:41,532 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 12:44:41,532 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 12:44:41,535 INFO L158 Benchmark]: Toolchain (without parser) took 11977.47ms. Allocated memory was 94.4MB in the beginning and 260.0MB in the end (delta: 165.7MB). Free memory was 74.7MB in the beginning and 211.6MB in the end (delta: -136.9MB). Peak memory consumption was 29.2MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,535 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 12:44:41,535 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.55ms. Allocated memory is still 94.4MB. Free memory was 74.4MB in the beginning and 63.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.31ms. Allocated memory is still 94.4MB. Free memory was 63.5MB in the beginning and 62.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,536 INFO L158 Benchmark]: Boogie Preprocessor took 34.41ms. Allocated memory is still 94.4MB. Free memory was 62.0MB in the beginning and 60.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,536 INFO L158 Benchmark]: RCFGBuilder took 412.23ms. Allocated memory is still 94.4MB. Free memory was 60.6MB in the beginning and 70.2MB in the end (delta: -9.6MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,536 INFO L158 Benchmark]: TraceAbstraction took 11210.97ms. Allocated memory was 94.4MB in the beginning and 260.0MB in the end (delta: 165.7MB). Free memory was 69.7MB in the beginning and 214.7MB in the end (delta: -145.1MB). Peak memory consumption was 154.9MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,538 INFO L158 Benchmark]: Witness Printer took 39.29ms. Allocated memory is still 260.0MB. Free memory was 214.7MB in the beginning and 211.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-09-01 12:44:41,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 65.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.55ms. Allocated memory is still 94.4MB. Free memory was 74.4MB in the beginning and 63.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.31ms. Allocated memory is still 94.4MB. Free memory was 63.5MB in the beginning and 62.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.41ms. Allocated memory is still 94.4MB. Free memory was 62.0MB in the beginning and 60.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 412.23ms. Allocated memory is still 94.4MB. Free memory was 60.6MB in the beginning and 70.2MB in the end (delta: -9.6MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. * TraceAbstraction took 11210.97ms. Allocated memory was 94.4MB in the beginning and 260.0MB in the end (delta: 165.7MB). Free memory was 69.7MB in the beginning and 214.7MB in the end (delta: -145.1MB). Peak memory consumption was 154.9MB. Max. memory is 16.1GB. * Witness Printer took 39.29ms. Allocated memory is still 260.0MB. Free memory was 214.7MB in the beginning and 211.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 78 PlacesBefore, 18 PlacesAfterwards, 82 TransitionsBefore, 13 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 81 TotalNumberOfCompositions, 1141 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1095, independent: 1089, independent conditional: 0, independent unconditional: 1089, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 617, independent: 614, independent conditional: 0, independent unconditional: 614, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1095, independent: 475, independent conditional: 0, independent unconditional: 475, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 617, unknown conditional: 0, unknown unconditional: 617] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 101]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 112 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: 11.1s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 493 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 433 mSDsluCounter, 277 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 269 mSDsCounter, 171 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1195 IncrementalHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 171 mSolverCounterUnsat, 8 mSDtfsCounter, 1195 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=670occurred in iteration=5, InterpolantAutomatonStates: 57, 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, 4.8s InterpolantComputationTime, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 1809 SizeOfPredicates, 23 NumberOfNonLiveVariables, 453 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 11/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-09-01 12:44:41,565 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 Result: TRUE