./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.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/26_stack_cas_longest-1.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 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --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 22:58:13,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:58:13,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:58:13,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:58:13,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:58:13,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:58:13,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:58:13,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:58:13,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:58:13,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:58:13,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:58:13,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:58:13,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:58:13,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:58:13,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:58:13,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:58:13,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:58:13,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:58:13,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:58:13,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:58:13,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:58:13,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:58:13,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:58:13,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:58:13,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:58:13,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:58:13,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:58:13,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:58:13,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:58:13,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:58:13,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:58:13,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:58:13,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:58:13,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:58:13,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:58:13,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:58:13,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:58:13,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:58:13,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:58:13,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:58:13,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:58:13,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:58:13,674 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:58:13,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:58:13,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:58:13,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:58:13,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:58:13,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:58:13,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:58:13,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:58:13,678 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:58:13,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:58:13,679 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:58:13,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:58:13,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:58:13,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:58:13,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:58:13,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:58:13,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:58:13,680 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:58:13,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:58:13,680 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:58:13,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:58:13,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:58:13,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:58:13,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:58:13,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:58:13,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:58:13,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:58:13,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:58:13,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:58:13,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:58:13,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:58:13,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:58:13,683 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:58:13,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:58:13,683 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:58:13,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:58:13,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:58:13,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:58:13,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:58:13,960 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:58:13,960 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:58:13,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-30 22:58:15,105 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:58:15,379 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:58:15,379 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-30 22:58:15,395 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421c3c145/93b3f5dde9b0442f89ae14b827499633/FLAG46f2a192f [2023-08-30 22:58:15,407 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421c3c145/93b3f5dde9b0442f89ae14b827499633 [2023-08-30 22:58:15,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:58:15,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:58:15,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:58:15,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:58:15,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:58:15,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536c6c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15, skipping insertion in model container [2023-08-30 22:58:15,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:58:15,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:58:15,728 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/26_stack_cas_longest-1.i[31167,31180] [2023-08-30 22:58:15,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:58:15,751 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:58:15,793 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/26_stack_cas_longest-1.i[31167,31180] [2023-08-30 22:58:15,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:58:15,868 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:58:15,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15 WrapperNode [2023-08-30 22:58:15,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:58:15,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:58:15,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:58:15,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:58:15,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,936 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2023-08-30 22:58:15,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:58:15,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:58:15,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:58:15,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:58:15,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,968 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:58:15,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:58:15,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:58:15,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:58:15,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (1/1) ... [2023-08-30 22:58:15,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:58:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:58:16,018 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 22:58:16,033 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 22:58:16,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:58:16,051 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-30 22:58:16,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-30 22:58:16,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:58:16,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:58:16,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:58:16,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:58:16,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:58:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:58:16,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:58:16,053 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 22:58:16,167 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:58:16,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:58:16,487 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:58:16,656 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:58:16,657 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 22:58:16,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:58:16 BoogieIcfgContainer [2023-08-30 22:58:16,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:58:16,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:58:16,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:58:16,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:58:16,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:58:15" (1/3) ... [2023-08-30 22:58:16,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54122cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:58:16, skipping insertion in model container [2023-08-30 22:58:16,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:58:15" (2/3) ... [2023-08-30 22:58:16,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54122cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:58:16, skipping insertion in model container [2023-08-30 22:58:16,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:58:16" (3/3) ... [2023-08-30 22:58:16,667 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-08-30 22:58:16,674 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:58:16,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:58:16,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:58:16,682 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:58:16,756 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:16,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:16,836 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 22:58:16,836 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:58:16,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 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. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 22:58:16,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:16,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:16,847 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:16,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:16,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:16,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 114 transitions, 233 flow [2023-08-30 22:58:16,879 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2023-08-30 22:58:16,879 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:58:16,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 124 events. 11/124 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. 0/110 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2023-08-30 22:58:16,882 INFO L119 LiptonReduction]: Number of co-enabled transitions 2028 [2023-08-30 22:58:20,487 INFO L134 LiptonReduction]: Checked pairs total: 2167 [2023-08-30 22:58:20,488 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-30 22:58:20,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:20,504 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;@54609df8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:20,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 22:58:20,508 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-08-30 22:58:20,508 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:58:20,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:20,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 22:58:20,509 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 22:58:20,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:20,513 INFO L85 PathProgramCache]: Analyzing trace with hash 174361225, now seen corresponding path program 1 times [2023-08-30 22:58:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607393784] [2023-08-30 22:58:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:20,605 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:58:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:20,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:58:20,639 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:58:20,639 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-30 22:58:20,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 22:58:20,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 22:58:20,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:58:20,642 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 22:58:20,644 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:58:20,645 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 22:58:20,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:20,742 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 22:58:20,742 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:58:20,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 22:58:20,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:20,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:20,747 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:20,747 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:20,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:20,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 193 transitions, 398 flow [2023-08-30 22:58:20,778 INFO L130 PetriNetUnfolder]: 21/215 cut-off events. [2023-08-30 22:58:20,778 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:58:20,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 215 events. 21/215 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 410 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 168. Up to 6 conditions per place. [2023-08-30 22:58:20,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 16380 [2023-08-30 22:58:25,239 INFO L134 LiptonReduction]: Checked pairs total: 33585 [2023-08-30 22:58:25,239 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-30 22:58:25,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:25,242 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;@54609df8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:25,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 22:58:25,249 INFO L130 PetriNetUnfolder]: 3/31 cut-off events. [2023-08-30 22:58:25,249 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 22:58:25,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:25,250 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 22:58:25,250 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 22:58:25,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1971217253, now seen corresponding path program 1 times [2023-08-30 22:58:25,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:25,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254044565] [2023-08-30 22:58:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:25,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:58:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:25,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:58:25,319 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:58:25,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-30 22:58:25,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-30 22:58:25,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-30 22:58:25,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-30 22:58:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:58:25,321 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 22:58:25,322 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:58:25,322 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 22:58:25,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:25,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:25,444 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-08-30 22:58:25,444 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:58:25,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 22:58:25,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:25,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:25,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:25,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:25,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:25,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 272 transitions, 565 flow [2023-08-30 22:58:25,509 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2023-08-30 22:58:25,510 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:58:25,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 306 events. 31/306 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 814 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-08-30 22:58:25,530 INFO L119 LiptonReduction]: Number of co-enabled transitions 43056 [2023-08-30 22:58:31,145 INFO L134 LiptonReduction]: Checked pairs total: 78907 [2023-08-30 22:58:31,145 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-30 22:58:31,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:31,148 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;@54609df8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:31,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 22:58:31,154 INFO L130 PetriNetUnfolder]: 7/57 cut-off events. [2023-08-30 22:58:31,154 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 22:58:31,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:31,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:58:31,155 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 22:58:31,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:31,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1544388608, now seen corresponding path program 1 times [2023-08-30 22:58:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:31,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632197383] [2023-08-30 22:58:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:31,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:58:31,326 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 22:58:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:58:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632197383] [2023-08-30 22:58:31,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632197383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:58:31,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:58:31,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:58:31,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144789349] [2023-08-30 22:58:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:58:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:58:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:58:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:58:31,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:58:31,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 490 [2023-08-30 22:58:31,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 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 22:58:31,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:58:31,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 490 [2023-08-30 22:58:31,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:58:36,915 INFO L130 PetriNetUnfolder]: 46331/66407 cut-off events. [2023-08-30 22:58:36,915 INFO L131 PetriNetUnfolder]: For 2467/2467 co-relation queries the response was YES. [2023-08-30 22:58:37,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129134 conditions, 66407 events. 46331/66407 cut-off events. For 2467/2467 co-relation queries the response was YES. Maximal size of possible extension queue 1898. Compared 484886 event pairs, 3829 based on Foata normal form. 0/53028 useless extension candidates. Maximal degree in co-relation 84412. Up to 41570 conditions per place. [2023-08-30 22:58:37,565 INFO L137 encePairwiseOnDemand]: 474/490 looper letters, 196 selfloop transitions, 9 changer transitions 0/226 dead transitions. [2023-08-30 22:58:37,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 226 transitions, 914 flow [2023-08-30 22:58:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 22:58:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 22:58:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1335 transitions. [2023-08-30 22:58:37,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448979591836735 [2023-08-30 22:58:37,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1335 transitions. [2023-08-30 22:58:37,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1335 transitions. [2023-08-30 22:58:37,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:58:37,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1335 transitions. [2023-08-30 22:58:37,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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 22:58:37,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 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 22:58:37,614 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 490.0) internal successors, (2940), 6 states have internal predecessors, (2940), 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 22:58:37,615 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 213 flow. Second operand 5 states and 1335 transitions. [2023-08-30 22:58:37,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 226 transitions, 914 flow [2023-08-30 22:58:37,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 226 transitions, 902 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 22:58:37,628 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 267 flow [2023-08-30 22:58:37,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=490, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2023-08-30 22:58:37,632 INFO L281 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2023-08-30 22:58:37,632 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 267 flow [2023-08-30 22:58:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 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 22:58:37,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:37,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 22:58:37,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:58:37,634 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 22:58:37,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash -271960691, now seen corresponding path program 1 times [2023-08-30 22:58:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546436311] [2023-08-30 22:58:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:37,653 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:58:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:58:37,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:58:37,668 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:58:37,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-30 22:58:37,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-30 22:58:37,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-30 22:58:37,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-30 22:58:37,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-30 22:58:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:58:37,670 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 22:58:37,671 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 22:58:37,671 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 22:58:37,726 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 22:58:37,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:37,785 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-08-30 22:58:37,786 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:58:37,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-08-30 22:58:37,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:37,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:37,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:58:37,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:37,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:37,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 351 transitions, 734 flow [2023-08-30 22:58:37,851 INFO L130 PetriNetUnfolder]: 41/397 cut-off events. [2023-08-30 22:58:37,851 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-30 22:58:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 397 events. 41/397 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1280 event pairs, 0 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 324. Up to 10 conditions per place. [2023-08-30 22:58:37,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 82056 [2023-08-30 22:58:44,987 INFO L134 LiptonReduction]: Checked pairs total: 163123 [2023-08-30 22:58:44,988 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-30 22:58:44,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:58:44,990 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;@54609df8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:58:44,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-30 22:58:44,996 INFO L130 PetriNetUnfolder]: 8/60 cut-off events. [2023-08-30 22:58:44,996 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-30 22:58:44,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:58:44,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:58:44,996 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 22:58:44,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:58:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1068344059, now seen corresponding path program 1 times [2023-08-30 22:58:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:58:44,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458619142] [2023-08-30 22:58:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:58:44,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:58:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:58:45,100 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 22:58:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:58:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458619142] [2023-08-30 22:58:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458619142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:58:45,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:58:45,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:58:45,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282844855] [2023-08-30 22:58:45,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:58:45,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:58:45,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:58:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:58:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:58:45,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 633 [2023-08-30 22:58:45,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 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 22:58:45,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:58:45,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 633 [2023-08-30 22:58:45,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:00:42,348 INFO L130 PetriNetUnfolder]: 1158189/1535626 cut-off events. [2023-08-30 23:00:42,349 INFO L131 PetriNetUnfolder]: For 70655/70655 co-relation queries the response was YES. [2023-08-30 23:00:47,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999796 conditions, 1535626 events. 1158189/1535626 cut-off events. For 70655/70655 co-relation queries the response was YES. Maximal size of possible extension queue 30474. Compared 12392434 event pairs, 164193 based on Foata normal form. 13910/1243779 useless extension candidates. Maximal degree in co-relation 765350. Up to 947194 conditions per place. [2023-08-30 23:00:58,058 INFO L137 encePairwiseOnDemand]: 611/633 looper letters, 296 selfloop transitions, 17 changer transitions 0/341 dead transitions. [2023-08-30 23:00:58,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 341 transitions, 1398 flow [2023-08-30 23:00:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:00:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:00:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1781 transitions. [2023-08-30 23:00:58,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627172195892575 [2023-08-30 23:00:58,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1781 transitions. [2023-08-30 23:00:58,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1781 transitions. [2023-08-30 23:00:58,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:00:58,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1781 transitions. [2023-08-30 23:00:58,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 356.2) internal successors, (1781), 5 states have internal predecessors, (1781), 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 23:00:58,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 633.0) internal successors, (3798), 6 states have internal predecessors, (3798), 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 23:00:58,106 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 633.0) internal successors, (3798), 6 states have internal predecessors, (3798), 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 23:00:58,106 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 288 flow. Second operand 5 states and 1781 transitions. [2023-08-30 23:00:58,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 341 transitions, 1398 flow [2023-08-30 23:00:58,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 341 transitions, 1368 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-30 23:00:58,214 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 396 flow [2023-08-30 23:00:58,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=633, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2023-08-30 23:00:58,218 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, 7 predicate places. [2023-08-30 23:00:58,218 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 396 flow [2023-08-30 23:00:58,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 289.25) internal successors, (1157), 4 states have internal predecessors, (1157), 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 23:00:58,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:00:58,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:00:58,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:00:58,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-08-30 23:00:58,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:00:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1687160668, now seen corresponding path program 1 times [2023-08-30 23:00:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:00:58,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149078332] [2023-08-30 23:00:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:00:58,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:00:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:00:58,355 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 23:00:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:00:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149078332] [2023-08-30 23:00:58,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149078332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:00:58,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:00:58,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:00:58,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653338478] [2023-08-30 23:00:58,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:00:58,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:00:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:00:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:00:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:00:58,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 633 [2023-08-30 23:00:58,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 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 23:00:58,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:00:58,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 633 [2023-08-30 23:00:58,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand