./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:01:10,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:01:10,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:01:10,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:01:10,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:01:10,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:01:10,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:01:10,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:01:10,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:01:10,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:01:10,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:01:10,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:01:10,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:01:10,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:01:10,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:01:10,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:01:10,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:01:10,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:01:10,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:01:10,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:01:10,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:01:10,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:01:10,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:01:10,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:01:10,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:01:10,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:01:10,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:01:10,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:01:10,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:01:10,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:01:10,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:01:10,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:01:10,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:01:10,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:01:10,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:01:10,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:01:10,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:01:10,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:01:10,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:01:10,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:01:10,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:01:10,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:01:10,811 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:01:10,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:01:10,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:01:10,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:01:10,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:01:10,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:01:10,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:01:10,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:01:10,814 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:01:10,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:01:10,814 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:01:10,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:01:10,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:01:10,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:01:10,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:01:10,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:01:10,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:01:10,816 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:01:10,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:01:10,816 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:01:10,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:01:10,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:01:10,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:01:10,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:01:10,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:01:10,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:01:10,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:01:10,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:01:10,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:01:10,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:01:10,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:01:10,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:01:10,818 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:01:10,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:01:10,819 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:01:10,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:01:11,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:01:11,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:01:11,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:01:11,082 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:01:11,082 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:01:11,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-08-30 23:01:11,958 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:01:12,160 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:01:12,160 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-08-30 23:01:12,168 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6243077/82ccfdb0630542618b1ca12261481828/FLAG8307fb329 [2023-08-30 23:01:12,179 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6243077/82ccfdb0630542618b1ca12261481828 [2023-08-30 23:01:12,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:01:12,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:01:12,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:01:12,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:01:12,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:01:12,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b982683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12, skipping insertion in model container [2023-08-30 23:01:12,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:01:12,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:01:12,497 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-08-30 23:01:12,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:01:12,510 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:01:12,548 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-08-30 23:01:12,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:01:12,580 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:01:12,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12 WrapperNode [2023-08-30 23:01:12,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:01:12,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:01:12,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:01:12,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:01:12,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,632 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2023-08-30 23:01:12,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:01:12,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:01:12,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:01:12,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:01:12,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:01:12,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:01:12,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:01:12,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:01:12,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (1/1) ... [2023-08-30 23:01:12,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:01:12,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:01:12,698 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) [2023-08-30 23:01:12,707 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 [2023-08-30 23:01:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 23:01:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 23:01:12,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 23:01:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:01:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:01:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:01:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:01:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:01:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:01:12,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:01:12,727 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:01:12,867 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:01:12,869 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:01:13,032 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:01:13,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:01:13,077 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 23:01:13,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:01:13 BoogieIcfgContainer [2023-08-30 23:01:13,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:01:13,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:01:13,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:01:13,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:01:13,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:01:12" (1/3) ... [2023-08-30 23:01:13,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b983993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:01:13, skipping insertion in model container [2023-08-30 23:01:13,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:01:12" (2/3) ... [2023-08-30 23:01:13,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b983993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:01:13, skipping insertion in model container [2023-08-30 23:01:13,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:01:13" (3/3) ... [2023-08-30 23:01:13,089 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-08-30 23:01:13,094 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:01:13,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:01:13,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:01:13,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:01:13,142 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:13,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2023-08-30 23:01:13,191 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2023-08-30 23:01:13,194 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:13,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 10/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 23:01:13,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 91 transitions, 187 flow [2023-08-30 23:01:13,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 91 transitions, 187 flow [2023-08-30 23:01:13,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:13,220 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 91 transitions, 187 flow [2023-08-30 23:01:13,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 91 transitions, 187 flow [2023-08-30 23:01:13,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 187 flow [2023-08-30 23:01:13,253 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2023-08-30 23:01:13,253 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:13,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 101 events. 10/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-30 23:01:13,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 1612 [2023-08-30 23:01:14,556 INFO L134 LiptonReduction]: Checked pairs total: 2202 [2023-08-30 23:01:14,556 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-30 23:01:14,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:14,569 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;@14aec91f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:14,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 23:01:14,571 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2023-08-30 23:01:14,577 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:01:14,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:14,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 23:01:14,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 23:01:14,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash 439100169, now seen corresponding path program 1 times [2023-08-30 23:01:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:14,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821754791] [2023-08-30 23:01:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:14,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:01:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:14,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:01:14,696 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:01:14,697 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 23:01:14,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 23:01:14,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 23:01:14,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:01:14,700 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 23:01:14,704 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:01:14,704 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 23:01:14,734 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2023-08-30 23:01:14,794 INFO L130 PetriNetUnfolder]: 19/176 cut-off events. [2023-08-30 23:01:14,794 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:01:14,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 176 events. 19/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-08-30 23:01:14,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 154 transitions, 320 flow [2023-08-30 23:01:14,797 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 154 transitions, 320 flow [2023-08-30 23:01:14,797 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:14,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 154 transitions, 320 flow [2023-08-30 23:01:14,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 154 transitions, 320 flow [2023-08-30 23:01:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 154 transitions, 320 flow [2023-08-30 23:01:14,811 INFO L130 PetriNetUnfolder]: 19/176 cut-off events. [2023-08-30 23:01:14,811 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:01:14,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 176 events. 19/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 400 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2023-08-30 23:01:14,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 11036 [2023-08-30 23:01:16,247 INFO L134 LiptonReduction]: Checked pairs total: 20186 [2023-08-30 23:01:16,248 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-30 23:01:16,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:16,250 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;@14aec91f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:16,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:01:16,252 INFO L130 PetriNetUnfolder]: 2/33 cut-off events. [2023-08-30 23:01:16,252 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 23:01:16,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:16,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 23:01:16,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 23:01:16,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -630136530, now seen corresponding path program 1 times [2023-08-30 23:01:16,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:16,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452995365] [2023-08-30 23:01:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:16,272 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:01:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:16,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:01:16,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:01:16,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 23:01:16,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 23:01:16,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 23:01:16,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 23:01:16,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:01:16,286 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 23:01:16,287 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:01:16,287 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 23:01:16,318 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:16,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 455 flow [2023-08-30 23:01:16,356 INFO L130 PetriNetUnfolder]: 28/251 cut-off events. [2023-08-30 23:01:16,356 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:01:16,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 251 events. 28/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-08-30 23:01:16,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 217 transitions, 455 flow [2023-08-30 23:01:16,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 217 transitions, 455 flow [2023-08-30 23:01:16,361 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:16,361 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 217 transitions, 455 flow [2023-08-30 23:01:16,361 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 217 transitions, 455 flow [2023-08-30 23:01:16,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 217 transitions, 455 flow [2023-08-30 23:01:16,383 INFO L130 PetriNetUnfolder]: 28/251 cut-off events. [2023-08-30 23:01:16,384 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 23:01:16,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 251 events. 28/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 756 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 198. Up to 8 conditions per place. [2023-08-30 23:01:16,394 INFO L119 LiptonReduction]: Number of co-enabled transitions 28272 [2023-08-30 23:01:18,176 INFO L134 LiptonReduction]: Checked pairs total: 57548 [2023-08-30 23:01:18,176 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-30 23:01:18,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:18,178 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;@14aec91f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:18,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 23:01:18,182 INFO L130 PetriNetUnfolder]: 5/51 cut-off events. [2023-08-30 23:01:18,182 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 23:01:18,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:18,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:18,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:01:18,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash 403518162, now seen corresponding path program 1 times [2023-08-30 23:01:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521426544] [2023-08-30 23:01:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:18,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521426544] [2023-08-30 23:01:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521426544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:18,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:18,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:01:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031656200] [2023-08-30 23:01:18,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 23:01:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 23:01:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 23:01:18,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 386 [2023-08-30 23:01:18,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 193 flow. Second operand has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 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) [2023-08-30 23:01:18,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:18,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 386 [2023-08-30 23:01:18,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:01:20,565 INFO L130 PetriNetUnfolder]: 23393/32911 cut-off events. [2023-08-30 23:01:20,566 INFO L131 PetriNetUnfolder]: For 1540/1540 co-relation queries the response was YES. [2023-08-30 23:01:20,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66031 conditions, 32911 events. 23393/32911 cut-off events. For 1540/1540 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 206215 event pairs, 19717 based on Foata normal form. 1115/29062 useless extension candidates. Maximal degree in co-relation 33878. Up to 32043 conditions per place. [2023-08-30 23:01:20,723 INFO L137 encePairwiseOnDemand]: 375/386 looper letters, 54 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2023-08-30 23:01:20,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 265 flow [2023-08-30 23:01:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 23:01:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 23:01:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 435 transitions. [2023-08-30 23:01:20,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634715025906736 [2023-08-30 23:01:20,737 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 435 transitions. [2023-08-30 23:01:20,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 435 transitions. [2023-08-30 23:01:20,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:01:20,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 435 transitions. [2023-08-30 23:01:20,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 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) [2023-08-30 23:01:20,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,748 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:01:20,749 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 193 flow. Second operand 2 states and 435 transitions. [2023-08-30 23:01:20,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 265 flow [2023-08-30 23:01:20,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 259 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 23:01:20,755 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 151 flow [2023-08-30 23:01:20,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2023-08-30 23:01:20,759 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -10 predicate places. [2023-08-30 23:01:20,759 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 151 flow [2023-08-30 23:01:20,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 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) [2023-08-30 23:01:20,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:20,760 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 23:01:20,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:01:20,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-30 23:01:20,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1774801914, now seen corresponding path program 1 times [2023-08-30 23:01:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:20,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684002916] [2023-08-30 23:01:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:20,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:01:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:01:20,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:01:20,821 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:01:20,822 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 23:01:20,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 23:01:20,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 23:01:20,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 23:01:20,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 23:01:20,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:01:20,823 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:01:20,823 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:01:20,823 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 23:01:20,853 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:01:20,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 280 transitions, 592 flow [2023-08-30 23:01:20,980 INFO L130 PetriNetUnfolder]: 37/326 cut-off events. [2023-08-30 23:01:20,980 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:01:20,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 326 events. 37/326 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1138 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 10 conditions per place. [2023-08-30 23:01:20,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 256 places, 280 transitions, 592 flow [2023-08-30 23:01:20,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 280 transitions, 592 flow [2023-08-30 23:01:20,985 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:01:20,985 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 280 transitions, 592 flow [2023-08-30 23:01:20,985 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 280 transitions, 592 flow [2023-08-30 23:01:20,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 280 transitions, 592 flow [2023-08-30 23:01:21,018 INFO L130 PetriNetUnfolder]: 37/326 cut-off events. [2023-08-30 23:01:21,019 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 23:01:21,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 326 events. 37/326 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1138 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 10 conditions per place. [2023-08-30 23:01:21,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 53320 [2023-08-30 23:01:22,987 INFO L134 LiptonReduction]: Checked pairs total: 109875 [2023-08-30 23:01:22,988 INFO L136 LiptonReduction]: Total number of compositions: 228 [2023-08-30 23:01:22,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:01:22,990 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;@14aec91f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:01:22,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 23:01:22,994 INFO L130 PetriNetUnfolder]: 5/47 cut-off events. [2023-08-30 23:01:22,994 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 23:01:22,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:01:22,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:01:22,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:01:22,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:01:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash 341503089, now seen corresponding path program 1 times [2023-08-30 23:01:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:01:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127991747] [2023-08-30 23:01:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:01:22,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:01:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:01:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:01:23,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:01:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127991747] [2023-08-30 23:01:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127991747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:01:23,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:01:23,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:01:23,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010433772] [2023-08-30 23:01:23,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:01:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 23:01:23,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:01:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 23:01:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 23:01:23,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 508 [2023-08-30 23:01:23,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 252 flow. Second operand has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2023-08-30 23:01:23,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:01:23,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 508 [2023-08-30 23:01:23,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:02:05,796 INFO L130 PetriNetUnfolder]: 524002/673929 cut-off events. [2023-08-30 23:02:05,796 INFO L131 PetriNetUnfolder]: For 43471/43471 co-relation queries the response was YES. [2023-08-30 23:02:06,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359244 conditions, 673929 events. 524002/673929 cut-off events. For 43471/43471 co-relation queries the response was YES. Maximal size of possible extension queue 12099. Compared 4586952 event pairs, 447252 based on Foata normal form. 34261/603596 useless extension candidates. Maximal degree in co-relation 311722. Up to 663045 conditions per place. [2023-08-30 23:02:09,612 INFO L137 encePairwiseOnDemand]: 493/508 looper letters, 71 selfloop transitions, 0 changer transitions 0/88 dead transitions. [2023-08-30 23:02:09,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 350 flow [2023-08-30 23:02:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 23:02:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 23:02:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 562 transitions. [2023-08-30 23:02:09,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531496062992126 [2023-08-30 23:02:09,615 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 562 transitions. [2023-08-30 23:02:09,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 562 transitions. [2023-08-30 23:02:09,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:02:09,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 562 transitions. [2023-08-30 23:02:09,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 281.0) internal successors, (562), 2 states have internal predecessors, (562), 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) [2023-08-30 23:02:09,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 508.0) internal successors, (1524), 3 states have internal predecessors, (1524), 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) [2023-08-30 23:02:09,622 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 508.0) internal successors, (1524), 3 states have internal predecessors, (1524), 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) [2023-08-30 23:02:09,623 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 252 flow. Second operand 2 states and 562 transitions. [2023-08-30 23:02:09,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 350 flow [2023-08-30 23:02:09,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 338 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 23:02:09,649 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 196 flow [2023-08-30 23:02:09,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2023-08-30 23:02:09,650 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -11 predicate places. [2023-08-30 23:02:09,650 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 196 flow [2023-08-30 23:02:09,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2023-08-30 23:02:09,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:09,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:09,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:02:09,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:02:09,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1252805735, now seen corresponding path program 1 times [2023-08-30 23:02:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:09,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851313826] [2023-08-30 23:02:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:09,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 23:02:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 23:02:09,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 23:02:09,686 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 23:02:09,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-30 23:02:09,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-30 23:02:09,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-30 23:02:09,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-30 23:02:09,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-30 23:02:09,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-30 23:02:09,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:02:09,687 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 23:02:09,687 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 23:02:09,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 23:02:09,717 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:02:09,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 343 transitions, 731 flow [2023-08-30 23:02:09,753 INFO L130 PetriNetUnfolder]: 46/401 cut-off events. [2023-08-30 23:02:09,753 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:02:09,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 401 events. 46/401 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1522 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-08-30 23:02:09,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 343 transitions, 731 flow [2023-08-30 23:02:09,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 343 transitions, 731 flow [2023-08-30 23:02:09,758 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:02:09,758 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 343 transitions, 731 flow [2023-08-30 23:02:09,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 343 transitions, 731 flow [2023-08-30 23:02:09,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 343 transitions, 731 flow [2023-08-30 23:02:09,792 INFO L130 PetriNetUnfolder]: 46/401 cut-off events. [2023-08-30 23:02:09,792 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-30 23:02:09,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 401 events. 46/401 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1522 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-08-30 23:02:09,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 86180 [2023-08-30 23:02:12,139 INFO L134 LiptonReduction]: Checked pairs total: 177753 [2023-08-30 23:02:12,139 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-30 23:02:12,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:02:12,141 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;@14aec91f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:02:12,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 23:02:12,143 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2023-08-30 23:02:12,144 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 23:02:12,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:02:12,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:02:12,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-30 23:02:12,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:02:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1394915895, now seen corresponding path program 1 times [2023-08-30 23:02:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:02:12,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979074946] [2023-08-30 23:02:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:02:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:02:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:02:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:02:12,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:02:12,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979074946] [2023-08-30 23:02:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979074946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:02:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:02:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:02:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201061233] [2023-08-30 23:02:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:02:12,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 23:02:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:02:12,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 23:02:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 23:02:12,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 607 [2023-08-30 23:02:12,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 134 transitions, 313 flow. Second operand has 2 states, 2 states have (on average 296.5) internal successors, (593), 2 states have internal predecessors, (593), 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) [2023-08-30 23:02:12,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:02:12,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 607 [2023-08-30 23:02:12,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand