./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/goblint-regression/28-race_reach_81-list_racing.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 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 18:11:37,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 18:11:37,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 18:11:37,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 18:11:37,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 18:11:37,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 18:11:38,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 18:11:38,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 18:11:38,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 18:11:38,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 18:11:38,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 18:11:38,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 18:11:38,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 18:11:38,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 18:11:38,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 18:11:38,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 18:11:38,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 18:11:38,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 18:11:38,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 18:11:38,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 18:11:38,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 18:11:38,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 18:11:38,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 18:11:38,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 18:11:38,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 18:11:38,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 18:11:38,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 18:11:38,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 18:11:38,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 18:11:38,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 18:11:38,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 18:11:38,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 18:11:38,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 18:11:38,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 18:11:38,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 18:11:38,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 18:11:38,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 18:11:38,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 18:11:38,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 18:11:38,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 18:11:38,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 18:11:38,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 18:11:38,089 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 18:11:38,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 18:11:38,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 18:11:38,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 18:11:38,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 18:11:38,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 18:11:38,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 18:11:38,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 18:11:38,093 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 18:11:38,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 18:11:38,094 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 18:11:38,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 18:11:38,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 18:11:38,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 18:11:38,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 18:11:38,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 18:11:38,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 18:11:38,095 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 18:11:38,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 18:11:38,096 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 18:11:38,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 18:11:38,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 18:11:38,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 18:11:38,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 18:11:38,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:38,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 18:11:38,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 18:11:38,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 18:11:38,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 18:11:38,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 18:11:38,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 18:11:38,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 18:11:38,098 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 18:11:38,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 18:11:38,099 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 18:11:38,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 18:11:38,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 18:11:38,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 18:11:38,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 18:11:38,441 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 18:11:38,442 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 18:11:38,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-30 18:11:39,613 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 18:11:39,886 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 18:11:39,887 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i [2023-08-30 18:11:39,902 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6053c63/70877972accb4951a8f6bcd0a8484398/FLAGe06d931de [2023-08-30 18:11:39,913 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6053c63/70877972accb4951a8f6bcd0a8484398 [2023-08-30 18:11:39,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 18:11:39,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 18:11:39,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:39,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 18:11:39,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 18:11:39,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5212cee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:39, skipping insertion in model container [2023-08-30 18:11:39,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:11:39" (1/1) ... [2023-08-30 18:11:39,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 18:11:39,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 18:11:40,334 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2023-08-30 18:11:40,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:40,382 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 18:11:40,409 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2023-08-30 18:11:40,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 18:11:40,478 INFO L208 MainTranslator]: Completed translation [2023-08-30 18:11:40,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40 WrapperNode [2023-08-30 18:11:40,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 18:11:40,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:40,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 18:11:40,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 18:11:40,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,525 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-08-30 18:11:40,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 18:11:40,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 18:11:40,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 18:11:40,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 18:11:40,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 18:11:40,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 18:11:40,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 18:11:40,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 18:11:40,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (1/1) ... [2023-08-30 18:11:40,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 18:11:40,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:40,598 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 18:11:40,619 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 18:11:40,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 18:11:40,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 18:11:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-30 18:11:40,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-30 18:11:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 18:11:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 18:11:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-30 18:11:40,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-30 18:11:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 18:11:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 18:11:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 18:11:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 18:11:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 18:11:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 18:11:40,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 18:11:40,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 18:11:40,637 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 18:11:40,855 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 18:11:40,857 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 18:11:41,211 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 18:11:41,222 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 18:11:41,222 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-30 18:11:41,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:41 BoogieIcfgContainer [2023-08-30 18:11:41,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 18:11:41,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 18:11:41,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 18:11:41,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 18:11:41,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:11:39" (1/3) ... [2023-08-30 18:11:41,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f47fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:41, skipping insertion in model container [2023-08-30 18:11:41,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:11:40" (2/3) ... [2023-08-30 18:11:41,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f47fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:11:41, skipping insertion in model container [2023-08-30 18:11:41,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:11:41" (3/3) ... [2023-08-30 18:11:41,232 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2023-08-30 18:11:41,239 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 18:11:41,246 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 18:11:41,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 18:11:41,247 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 18:11:41,345 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 18:11:41,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-08-30 18:11:41,535 INFO L130 PetriNetUnfolder]: 52/398 cut-off events. [2023-08-30 18:11:41,535 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-30 18:11:41,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-08-30 18:11:41,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-08-30 18:11:41,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 206 transitions, 426 flow [2023-08-30 18:11:41,562 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:41,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 206 transitions, 426 flow [2023-08-30 18:11:41,572 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 206 transitions, 426 flow [2023-08-30 18:11:41,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 206 transitions, 426 flow [2023-08-30 18:11:41,636 INFO L130 PetriNetUnfolder]: 48/385 cut-off events. [2023-08-30 18:11:41,637 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:11:41,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 385 events. 48/385 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1511 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-30 18:11:41,647 INFO L119 LiptonReduction]: Number of co-enabled transitions 12518 [2023-08-30 18:11:47,544 INFO L134 LiptonReduction]: Checked pairs total: 22830 [2023-08-30 18:11:47,544 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 18:11:47,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:11:47,562 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;@59807e6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:47,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:11:47,573 INFO L130 PetriNetUnfolder]: 5/54 cut-off events. [2023-08-30 18:11:47,573 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:47,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:47,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:47,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -575739965, now seen corresponding path program 1 times [2023-08-30 18:11:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:47,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620905866] [2023-08-30 18:11:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:47,836 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 18:11:47,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620905866] [2023-08-30 18:11:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620905866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:11:47,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:11:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:11:47,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376519125] [2023-08-30 18:11:47,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:11:47,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:11:47,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:11:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:11:47,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 376 [2023-08-30 18:11:47,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 18:11:47,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:47,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 376 [2023-08-30 18:11:47,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:48,454 INFO L130 PetriNetUnfolder]: 2607/4297 cut-off events. [2023-08-30 18:11:48,454 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-30 18:11:48,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8429 conditions, 4297 events. 2607/4297 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23270 event pairs, 1395 based on Foata normal form. 240/3795 useless extension candidates. Maximal degree in co-relation 7741. Up to 4056 conditions per place. [2023-08-30 18:11:48,467 INFO L137 encePairwiseOnDemand]: 362/376 looper letters, 36 selfloop transitions, 2 changer transitions 15/56 dead transitions. [2023-08-30 18:11:48,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 228 flow [2023-08-30 18:11:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:11:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:11:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-30 18:11:48,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2023-08-30 18:11:48,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-30 18:11:48,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-30 18:11:48,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:48,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-30 18:11:48,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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 18:11:48,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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 18:11:48,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 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 18:11:48,507 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 132 flow. Second operand 3 states and 609 transitions. [2023-08-30 18:11:48,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 228 flow [2023-08-30 18:11:48,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:11:48,516 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 87 flow [2023-08-30 18:11:48,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2023-08-30 18:11:48,521 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-30 18:11:48,522 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 87 flow [2023-08-30 18:11:48,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 18:11:48,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:48,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:11:48,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 18:11:48,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:11:48,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1468372479, now seen corresponding path program 1 times [2023-08-30 18:11:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:48,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164093872] [2023-08-30 18:11:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:11:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164093872] [2023-08-30 18:11:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164093872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:11:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179903272] [2023-08-30 18:11:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:48,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:11:48,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:11:48,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 18:11:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:11:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:11:48,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:11:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:48,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:11:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:11:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179903272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:11:48,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:11:48,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:11:48,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564465298] [2023-08-30 18:11:48,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:11:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:11:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:11:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:11:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:11:48,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 376 [2023-08-30 18:11:48,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 87 flow. Second operand has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 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 18:11:48,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:11:48,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 376 [2023-08-30 18:11:48,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:11:49,040 INFO L130 PetriNetUnfolder]: 14/41 cut-off events. [2023-08-30 18:11:49,041 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 18:11:49,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 41 events. 14/41 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 8/49 useless extension candidates. Maximal degree in co-relation 99. Up to 30 conditions per place. [2023-08-30 18:11:49,042 INFO L137 encePairwiseOnDemand]: 373/376 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-30 18:11:49,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 86 flow [2023-08-30 18:11:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 18:11:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 18:11:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 744 transitions. [2023-08-30 18:11:49,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2023-08-30 18:11:49,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 744 transitions. [2023-08-30 18:11:49,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 744 transitions. [2023-08-30 18:11:49,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:11:49,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 744 transitions. [2023-08-30 18:11:49,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 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 18:11:49,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 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 18:11:49,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 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 18:11:49,051 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 87 flow. Second operand 4 states and 744 transitions. [2023-08-30 18:11:49,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 86 flow [2023-08-30 18:11:49,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 18:11:49,053 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-30 18:11:49,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-30 18:11:49,055 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -31 predicate places. [2023-08-30 18:11:49,055 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-30 18:11:49,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 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 18:11:49,058 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-30 18:11:49,059 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-30 18:11:49,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 18:11:49,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:11:49,265 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 18:11:49,267 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-30 18:11:49,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-08-30 18:11:49,307 INFO L130 PetriNetUnfolder]: 52/398 cut-off events. [2023-08-30 18:11:49,307 INFO L131 PetriNetUnfolder]: For 8/15 co-relation queries the response was YES. [2023-08-30 18:11:49,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-08-30 18:11:49,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-08-30 18:11:49,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 430 flow [2023-08-30 18:11:49,311 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:49,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-30 18:11:49,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-30 18:11:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 430 flow [2023-08-30 18:11:49,342 INFO L130 PetriNetUnfolder]: 48/386 cut-off events. [2023-08-30 18:11:49,343 INFO L131 PetriNetUnfolder]: For 4/7 co-relation queries the response was YES. [2023-08-30 18:11:49,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 386 events. 48/386 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1533 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-30 18:11:49,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 12564 [2023-08-30 18:11:55,220 INFO L134 LiptonReduction]: Checked pairs total: 23006 [2023-08-30 18:11:55,220 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-30 18:11:55,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:11:55,223 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;@59807e6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:11:55,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:11:55,226 INFO L130 PetriNetUnfolder]: 0/19 cut-off events. [2023-08-30 18:11:55,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 18:11:55,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:11:55,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 18:11:55,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:11:55,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:11:55,228 INFO L85 PathProgramCache]: Analyzing trace with hash -885258072, now seen corresponding path program 1 times [2023-08-30 18:11:55,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:11:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622295462] [2023-08-30 18:11:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:11:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:11:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:55,249 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:11:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:11:55,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:11:55,276 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:11:55,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 18:11:55,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 18:11:55,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 18:11:55,277 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:11:55,278 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 18:11:55,278 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:11:55,278 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 18:11:55,319 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-30 18:11:55,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-30 18:11:55,485 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-08-30 18:11:55,485 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-30 18:11:55,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7280 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-30 18:11:55,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-08-30 18:11:55,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 322 transitions, 688 flow [2023-08-30 18:11:55,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:11:55,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 322 transitions, 688 flow [2023-08-30 18:11:55,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 322 transitions, 688 flow [2023-08-30 18:11:55,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 322 transitions, 688 flow [2023-08-30 18:11:55,660 INFO L130 PetriNetUnfolder]: 191/1178 cut-off events. [2023-08-30 18:11:55,661 INFO L131 PetriNetUnfolder]: For 71/87 co-relation queries the response was YES. [2023-08-30 18:11:55,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 1178 events. 191/1178 cut-off events. For 71/87 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7319 event pairs, 2 based on Foata normal form. 0/991 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-30 18:11:55,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 51320 [2023-08-30 18:12:02,060 INFO L134 LiptonReduction]: Checked pairs total: 111515 [2023-08-30 18:12:02,060 INFO L136 LiptonReduction]: Total number of compositions: 250 [2023-08-30 18:12:02,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:12:02,063 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;@59807e6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:12:02,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 18:12:02,069 INFO L130 PetriNetUnfolder]: 5/54 cut-off events. [2023-08-30 18:12:02,069 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:12:02,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:12:02,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:12:02,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:12:02,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:12:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1536489628, now seen corresponding path program 1 times [2023-08-30 18:12:02,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:12:02,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200964762] [2023-08-30 18:12:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:12:02,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:12:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:12:02,109 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 18:12:02,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:12:02,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200964762] [2023-08-30 18:12:02,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200964762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:12:02,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:12:02,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:12:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267861993] [2023-08-30 18:12:02,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:12:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:12:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:12:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:12:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:12:02,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 573 [2023-08-30 18:12:02,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 18:12:02,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:12:02,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 573 [2023-08-30 18:12:02,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:14,270 INFO L130 PetriNetUnfolder]: 783305/1049221 cut-off events. [2023-08-30 18:13:14,270 INFO L131 PetriNetUnfolder]: For 44788/44788 co-relation queries the response was YES. [2023-08-30 18:13:16,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2057276 conditions, 1049221 events. 783305/1049221 cut-off events. For 44788/44788 co-relation queries the response was YES. Maximal size of possible extension queue 20990. Compared 8033382 event pairs, 546616 based on Foata normal form. 84048/984157 useless extension candidates. Maximal degree in co-relation 325052. Up to 987090 conditions per place. [2023-08-30 18:13:18,503 INFO L137 encePairwiseOnDemand]: 548/573 looper letters, 81 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-30 18:13:18,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 98 transitions, 406 flow [2023-08-30 18:13:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 18:13:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 18:13:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-08-30 18:13:18,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5450843513670739 [2023-08-30 18:13:18,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-08-30 18:13:18,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-08-30 18:13:18,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:18,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-08-30 18:13:18,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 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 18:13:18,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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 18:13:18,520 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 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 18:13:18,520 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 266 flow. Second operand 3 states and 937 transitions. [2023-08-30 18:13:18,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 98 transitions, 406 flow [2023-08-30 18:13:18,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:13:18,994 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 231 flow [2023-08-30 18:13:18,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-08-30 18:13:18,995 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2023-08-30 18:13:18,995 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 231 flow [2023-08-30 18:13:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 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 18:13:18,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:18,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:18,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 18:13:18,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-30 18:13:18,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1383156469, now seen corresponding path program 1 times [2023-08-30 18:13:18,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:18,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239788843] [2023-08-30 18:13:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:18,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239788843] [2023-08-30 18:13:19,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239788843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 18:13:19,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492281960] [2023-08-30 18:13:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:19,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:19,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 18:13:19,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 18:13:19,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 18:13:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:19,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 18:13:19,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 18:13:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:19,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 18:13:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 18:13:19,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492281960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 18:13:19,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 18:13:19,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 18:13:19,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581544727] [2023-08-30 18:13:19,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 18:13:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 18:13:19,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 18:13:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 18:13:19,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 573 [2023-08-30 18:13:19,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 279.14285714285717) internal successors, (1954), 7 states have internal predecessors, (1954), 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 18:13:19,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:19,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 573 [2023-08-30 18:13:19,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 18:13:19,378 INFO L130 PetriNetUnfolder]: 257/477 cut-off events. [2023-08-30 18:13:19,378 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-30 18:13:19,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 477 events. 257/477 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2012 event pairs, 0 based on Foata normal form. 64/541 useless extension candidates. Maximal degree in co-relation 1019. Up to 306 conditions per place. [2023-08-30 18:13:19,379 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-30 18:13:19,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 187 flow [2023-08-30 18:13:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 18:13:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 18:13:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1423 transitions. [2023-08-30 18:13:19,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966841186736475 [2023-08-30 18:13:19,384 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1423 transitions. [2023-08-30 18:13:19,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1423 transitions. [2023-08-30 18:13:19,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 18:13:19,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1423 transitions. [2023-08-30 18:13:19,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.6) internal successors, (1423), 5 states have internal predecessors, (1423), 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 18:13:19,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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 18:13:19,394 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 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 18:13:19,394 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 231 flow. Second operand 5 states and 1423 transitions. [2023-08-30 18:13:19,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 187 flow [2023-08-30 18:13:19,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 18:13:19,396 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-30 18:13:19,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-30 18:13:19,396 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -52 predicate places. [2023-08-30 18:13:19,397 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-30 18:13:19,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 279.14285714285717) internal successors, (1954), 7 states have internal predecessors, (1954), 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 18:13:19,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 18:13:19,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-30 18:13:19,398 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-30 18:13:19,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 18:13:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 18:13:19,604 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-30 18:13:19,604 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-30 18:13:19,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-30 18:13:19,748 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-08-30 18:13:19,748 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-30 18:13:19,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7280 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-30 18:13:19,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-08-30 18:13:19,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 323 transitions, 694 flow [2023-08-30 18:13:19,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:13:19,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-30 18:13:19,770 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-30 18:13:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-30 18:13:19,884 INFO L130 PetriNetUnfolder]: 191/1179 cut-off events. [2023-08-30 18:13:19,884 INFO L131 PetriNetUnfolder]: For 72/95 co-relation queries the response was YES. [2023-08-30 18:13:19,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7280 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-30 18:13:19,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 51412 [2023-08-30 18:13:26,379 INFO L134 LiptonReduction]: Checked pairs total: 111858 [2023-08-30 18:13:26,380 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-08-30 18:13:26,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-30 18:13:26,382 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;@59807e6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:13:26,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-30 18:13:26,388 INFO L130 PetriNetUnfolder]: 13/88 cut-off events. [2023-08-30 18:13:26,389 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 18:13:26,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:26,389 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 18:13:26,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 18:13:26,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2014292715, now seen corresponding path program 1 times [2023-08-30 18:13:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:26,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800695128] [2023-08-30 18:13:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:26,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:13:26,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 18:13:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 18:13:26,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 18:13:26,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 18:13:26,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-30 18:13:26,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-30 18:13:26,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 18:13:26,429 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-30 18:13:26,429 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-30 18:13:26,430 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 18:13:26,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 18:13:26,476 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-30 18:13:26,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 437 transitions, 952 flow [2023-08-30 18:13:26,975 INFO L130 PetriNetUnfolder]: 664/3284 cut-off events. [2023-08-30 18:13:26,975 INFO L131 PetriNetUnfolder]: For 419/462 co-relation queries the response was YES. [2023-08-30 18:13:27,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 3284 events. 664/3284 cut-off events. For 419/462 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 24950 event pairs, 64 based on Foata normal form. 0/2791 useless extension candidates. Maximal degree in co-relation 2153. Up to 192 conditions per place. [2023-08-30 18:13:27,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 437 transitions, 952 flow [2023-08-30 18:13:27,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 436 transitions, 944 flow [2023-08-30 18:13:27,065 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 18:13:27,065 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 388 places, 436 transitions, 944 flow [2023-08-30 18:13:27,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 388 places, 436 transitions, 944 flow [2023-08-30 18:13:27,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 436 transitions, 944 flow [2023-08-30 18:13:27,670 INFO L130 PetriNetUnfolder]: 664/3283 cut-off events. [2023-08-30 18:13:27,670 INFO L131 PetriNetUnfolder]: For 416/452 co-relation queries the response was YES. [2023-08-30 18:13:27,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3731 conditions, 3283 events. 664/3283 cut-off events. For 416/452 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 24958 event pairs, 64 based on Foata normal form. 0/2790 useless extension candidates. Maximal degree in co-relation 2153. Up to 192 conditions per place. [2023-08-30 18:13:27,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 115026 [2023-08-30 18:13:35,209 INFO L134 LiptonReduction]: Checked pairs total: 254043 [2023-08-30 18:13:35,209 INFO L136 LiptonReduction]: Total number of compositions: 331 [2023-08-30 18:13:35,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 18:13:35,211 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;@59807e6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 18:13:35,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 18:13:35,216 INFO L130 PetriNetUnfolder]: 5/56 cut-off events. [2023-08-30 18:13:35,216 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 18:13:35,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 18:13:35,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 18:13:35,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-30 18:13:35,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 18:13:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash 631681586, now seen corresponding path program 1 times [2023-08-30 18:13:35,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 18:13:35,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477857258] [2023-08-30 18:13:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 18:13:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 18:13:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 18:13:35,248 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 18:13:35,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 18:13:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477857258] [2023-08-30 18:13:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477857258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 18:13:35,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 18:13:35,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 18:13:35,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972807675] [2023-08-30 18:13:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 18:13:35,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 18:13:35,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 18:13:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 18:13:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 18:13:35,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 768 [2023-08-30 18:13:35,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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 18:13:35,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 18:13:35,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 768 [2023-08-30 18:13:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand