./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 00:21:22,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 00:21:22,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 00:21:22,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 00:21:22,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 00:21:22,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 00:21:22,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 00:21:22,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 00:21:22,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 00:21:22,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 00:21:22,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 00:21:22,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 00:21:22,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 00:21:22,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 00:21:22,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 00:21:22,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 00:21:22,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 00:21:22,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 00:21:22,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 00:21:22,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 00:21:22,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 00:21:22,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 00:21:22,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 00:21:22,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 00:21:22,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 00:21:22,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 00:21:22,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 00:21:22,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 00:21:22,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 00:21:22,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 00:21:22,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 00:21:22,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 00:21:22,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 00:21:22,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 00:21:22,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 00:21:22,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 00:21:22,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 00:21:22,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 00:21:22,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 00:21:22,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 00:21:22,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 00:21:22,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 00:21:22,174 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 00:21:22,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 00:21:22,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 00:21:22,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 00:21:22,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 00:21:22,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 00:21:22,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 00:21:22,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 00:21:22,178 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 00:21:22,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 00:21:22,179 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 00:21:22,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 00:21:22,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 00:21:22,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 00:21:22,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 00:21:22,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 00:21:22,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 00:21:22,181 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 00:21:22,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 00:21:22,181 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 00:21:22,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 00:21:22,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 00:21:22,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 00:21:22,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 00:21:22,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:21:22,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 00:21:22,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 00:21:22,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 00:21:22,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 00:21:22,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 00:21:22,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 00:21:22,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 00:21:22,184 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 00:21:22,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 00:21:22,184 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 00:21:22,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 00:21:22,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 00:21:22,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 00:21:22,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 00:21:22,543 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 00:21:22,544 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 00:21:22,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-08-31 00:21:23,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 00:21:24,089 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 00:21:24,090 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-08-31 00:21:24,115 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35665643d/6e93825091d74ecea9e6f8b7d8d8bfaa/FLAG6c99b1f3a [2023-08-31 00:21:24,128 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35665643d/6e93825091d74ecea9e6f8b7d8d8bfaa [2023-08-31 00:21:24,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 00:21:24,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 00:21:24,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 00:21:24,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 00:21:24,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 00:21:24,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624d7335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24, skipping insertion in model container [2023-08-31 00:21:24,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 00:21:24,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 00:21:24,574 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_72-funloop_hard_racing.i[41323,41336] [2023-08-31 00:21:24,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:21:24,631 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 00:21:24,689 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_72-funloop_hard_racing.i[41323,41336] [2023-08-31 00:21:24,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 00:21:24,770 INFO L208 MainTranslator]: Completed translation [2023-08-31 00:21:24,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24 WrapperNode [2023-08-31 00:21:24,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 00:21:24,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 00:21:24,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 00:21:24,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 00:21:24,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,846 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-08-31 00:21:24,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 00:21:24,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 00:21:24,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 00:21:24,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 00:21:24,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,902 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 00:21:24,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 00:21:24,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 00:21:24,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 00:21:24,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (1/1) ... [2023-08-31 00:21:24,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 00:21:24,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:24,950 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) [2023-08-31 00:21:24,979 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 [2023-08-31 00:21:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 00:21:24,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 00:21:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 00:21:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 00:21:24,991 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 00:21:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 00:21:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 00:21:24,997 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 00:21:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 00:21:24,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 00:21:24,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 00:21:24,999 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 00:21:25,201 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 00:21:25,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 00:21:25,493 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 00:21:25,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 00:21:25,508 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-31 00:21:25,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:21:25 BoogieIcfgContainer [2023-08-31 00:21:25,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 00:21:25,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 00:21:25,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 00:21:25,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 00:21:25,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 12:21:24" (1/3) ... [2023-08-31 00:21:25,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cd7a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:21:25, skipping insertion in model container [2023-08-31 00:21:25,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 12:21:24" (2/3) ... [2023-08-31 00:21:25,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cd7a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 12:21:25, skipping insertion in model container [2023-08-31 00:21:25,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 12:21:25" (3/3) ... [2023-08-31 00:21:25,521 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-08-31 00:21:25,528 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 00:21:25,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 00:21:25,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-31 00:21:25,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 00:21:25,639 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 00:21:25,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-08-31 00:21:25,823 INFO L130 PetriNetUnfolder]: 73/381 cut-off events. [2023-08-31 00:21:25,824 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 00:21:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 381 events. 73/381 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1706 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-31 00:21:25,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-08-31 00:21:25,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-08-31 00:21:25,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:21:25,853 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-08-31 00:21:25,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-08-31 00:21:25,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-08-31 00:21:25,913 INFO L130 PetriNetUnfolder]: 72/376 cut-off events. [2023-08-31 00:21:25,913 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 376 events. 72/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1659 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-31 00:21:25,928 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-08-31 00:21:28,725 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-08-31 00:21:28,725 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-31 00:21:28,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:21:28,743 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;@7ab006cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:21:28,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 00:21:28,750 INFO L130 PetriNetUnfolder]: 9/35 cut-off events. [2023-08-31 00:21:28,750 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:28,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:28,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:28,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:21:28,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -454048497, now seen corresponding path program 1 times [2023-08-31 00:21:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:28,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095318489] [2023-08-31 00:21:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:29,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:29,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095318489] [2023-08-31 00:21:29,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095318489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:29,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:21:29,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:21:29,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80868957] [2023-08-31 00:21:29,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:29,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:29,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:21:29,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 430 [2023-08-31 00:21:29,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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) [2023-08-31 00:21:29,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:29,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 430 [2023-08-31 00:21:29,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:29,350 INFO L130 PetriNetUnfolder]: 579/1212 cut-off events. [2023-08-31 00:21:29,350 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:29,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6864 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-08-31 00:21:29,357 INFO L137 encePairwiseOnDemand]: 396/430 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-31 00:21:29,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-08-31 00:21:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-31 00:21:29,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286821705426357 [2023-08-31 00:21:29,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-31 00:21:29,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-31 00:21:29,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:29,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-31 00:21:29,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 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) [2023-08-31 00:21:29,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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) [2023-08-31 00:21:29,420 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 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) [2023-08-31 00:21:29,422 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 682 transitions. [2023-08-31 00:21:29,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-08-31 00:21:29,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:21:29,428 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2023-08-31 00:21:29,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-08-31 00:21:29,434 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-08-31 00:21:29,434 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2023-08-31 00:21:29,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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) [2023-08-31 00:21:29,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:29,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:29,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 00:21:29,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:21:29,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-08-31 00:21:29,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:29,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151776629] [2023-08-31 00:21:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:29,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:29,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151776629] [2023-08-31 00:21:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151776629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878517873] [2023-08-31 00:21:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:29,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:29,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:29,575 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) [2023-08-31 00:21:29,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 00:21:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:21:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:29,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:29,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878517873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:29,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:29,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:21:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863343002] [2023-08-31 00:21:29,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:29,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:21:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:21:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:21:29,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-08-31 00:21:29,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 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) [2023-08-31 00:21:29,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:29,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-08-31 00:21:29,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:30,041 INFO L130 PetriNetUnfolder]: 579/1215 cut-off events. [2023-08-31 00:21:30,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:30,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1215 events. 579/1215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6863 event pairs, 465 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 2282. Up to 1060 conditions per place. [2023-08-31 00:21:30,049 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-31 00:21:30,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2023-08-31 00:21:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:21:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:21:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1247 transitions. [2023-08-31 00:21:30,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-08-31 00:21:30,054 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1247 transitions. [2023-08-31 00:21:30,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1247 transitions. [2023-08-31 00:21:30,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:30,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1247 transitions. [2023-08-31 00:21:30,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 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) [2023-08-31 00:21:30,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-08-31 00:21:30,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 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) [2023-08-31 00:21:30,064 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 6 states and 1247 transitions. [2023-08-31 00:21:30,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2023-08-31 00:21:30,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 267 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:30,067 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 179 flow [2023-08-31 00:21:30,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-31 00:21:30,087 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-31 00:21:30,087 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 179 flow [2023-08-31 00:21:30,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 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) [2023-08-31 00:21:30,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:30,089 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 00:21:30,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-31 00:21:30,293 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 [2023-08-31 00:21:30,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:21:30,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-08-31 00:21:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199234920] [2023-08-31 00:21:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:30,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:30,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199234920] [2023-08-31 00:21:30,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199234920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:30,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092084631] [2023-08-31 00:21:30,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:21:30,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:30,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:30,427 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) [2023-08-31 00:21:30,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 00:21:30,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 00:21:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:21:30,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:21:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:30,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 00:21:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092084631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:30,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:30,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 00:21:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948195830] [2023-08-31 00:21:30,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:30,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 00:21:30,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 00:21:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 00:21:30,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-08-31 00:21:30,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 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) [2023-08-31 00:21:30,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:30,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-08-31 00:21:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:30,877 INFO L130 PetriNetUnfolder]: 579/1221 cut-off events. [2023-08-31 00:21:30,877 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 00:21:30,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 1221 events. 579/1221 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6856 event pairs, 465 based on Foata normal form. 6/1012 useless extension candidates. Maximal degree in co-relation 2273. Up to 1060 conditions per place. [2023-08-31 00:21:30,883 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-31 00:21:30,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 339 flow [2023-08-31 00:21:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 00:21:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 00:21:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2444 transitions. [2023-08-31 00:21:30,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47364341085271316 [2023-08-31 00:21:30,891 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2444 transitions. [2023-08-31 00:21:30,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2444 transitions. [2023-08-31 00:21:30,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:30,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2444 transitions. [2023-08-31 00:21:30,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.66666666666666) internal successors, (2444), 12 states have internal predecessors, (2444), 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) [2023-08-31 00:21:30,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 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) [2023-08-31 00:21:30,910 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 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) [2023-08-31 00:21:30,910 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 179 flow. Second operand 12 states and 2444 transitions. [2023-08-31 00:21:30,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 339 flow [2023-08-31 00:21:30,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 325 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:30,914 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 249 flow [2023-08-31 00:21:30,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-08-31 00:21:30,917 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-08-31 00:21:30,917 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 249 flow [2023-08-31 00:21:30,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 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) [2023-08-31 00:21:30,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:30,921 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 00:21:30,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:31,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 00:21:31,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-31 00:21:31,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-08-31 00:21:31,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:31,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628854981] [2023-08-31 00:21:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:31,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:31,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:21:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:31,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:21:31,204 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:21:31,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-31 00:21:31,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-31 00:21:31,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-31 00:21:31,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-31 00:21:31,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-31 00:21:31,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 00:21:31,208 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 00:21:31,210 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:21:31,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 00:21:31,243 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 00:21:31,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-31 00:21:31,324 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-08-31 00:21:31,325 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:21:31,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-31 00:21:31,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-08-31 00:21:31,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-08-31 00:21:31,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:21:31,336 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-31 00:21:31,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-08-31 00:21:31,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-08-31 00:21:31,392 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-08-31 00:21:31,392 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 00:21:31,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-08-31 00:21:31,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-08-31 00:21:34,478 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-08-31 00:21:34,478 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-31 00:21:34,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:21:34,481 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;@7ab006cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:21:34,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-31 00:21:34,495 INFO L130 PetriNetUnfolder]: 9/34 cut-off events. [2023-08-31 00:21:34,495 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:34,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:34,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:34,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:21:34,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1440537533, now seen corresponding path program 1 times [2023-08-31 00:21:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:34,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481271814] [2023-08-31 00:21:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:34,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481271814] [2023-08-31 00:21:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481271814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:34,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:21:34,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:21:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667910368] [2023-08-31 00:21:34,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:34,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:34,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:21:34,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-31 00:21:34,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 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) [2023-08-31 00:21:34,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:34,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-31 00:21:34,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:36,867 INFO L130 PetriNetUnfolder]: 19961/30642 cut-off events. [2023-08-31 00:21:36,867 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-31 00:21:36,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 212680 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-08-31 00:21:37,057 INFO L137 encePairwiseOnDemand]: 516/559 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-31 00:21:37,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-08-31 00:21:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-31 00:21:37,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253428741800835 [2023-08-31 00:21:37,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-31 00:21:37,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-31 00:21:37,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:37,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-31 00:21:37,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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) [2023-08-31 00:21:37,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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) [2023-08-31 00:21:37,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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) [2023-08-31 00:21:37,106 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 881 transitions. [2023-08-31 00:21:37,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-08-31 00:21:37,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:21:37,109 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-08-31 00:21:37,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-31 00:21:37,110 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-31 00:21:37,110 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-08-31 00:21:37,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 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) [2023-08-31 00:21:37,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:37,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:37,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 00:21:37,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:21:37,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash 38811947, now seen corresponding path program 1 times [2023-08-31 00:21:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:37,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909412894] [2023-08-31 00:21:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:37,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909412894] [2023-08-31 00:21:37,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909412894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:37,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200573384] [2023-08-31 00:21:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:37,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:37,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:37,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:37,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 00:21:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:21:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:37,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:21:37,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200573384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:37,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:21:37,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:21:37,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83437157] [2023-08-31 00:21:37,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:37,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:37,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:37,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:21:37,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-08-31 00:21:37,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-08-31 00:21:37,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:37,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-08-31 00:21:37,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:39,345 INFO L130 PetriNetUnfolder]: 19644/30266 cut-off events. [2023-08-31 00:21:39,345 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 00:21:39,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 30266 events. 19644/30266 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 213381 event pairs, 8256 based on Foata normal form. 0/24593 useless extension candidates. Maximal degree in co-relation 58576. Up to 28177 conditions per place. [2023-08-31 00:21:39,557 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-31 00:21:39,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-08-31 00:21:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:21:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:21:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 858 transitions. [2023-08-31 00:21:39,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2023-08-31 00:21:39,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 858 transitions. [2023-08-31 00:21:39,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 858 transitions. [2023-08-31 00:21:39,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:39,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 858 transitions. [2023-08-31 00:21:39,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 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) [2023-08-31 00:21:39,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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) [2023-08-31 00:21:39,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 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) [2023-08-31 00:21:39,569 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 858 transitions. [2023-08-31 00:21:39,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-08-31 00:21:39,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:39,575 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-08-31 00:21:39,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-08-31 00:21:39,579 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-08-31 00:21:39,580 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-08-31 00:21:39,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-08-31 00:21:39,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:39,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:39,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:39,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:39,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:21:39,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 762694548, now seen corresponding path program 1 times [2023-08-31 00:21:39,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:39,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031811893] [2023-08-31 00:21:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:39,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:39,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031811893] [2023-08-31 00:21:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031811893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813047371] [2023-08-31 00:21:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:39,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:39,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:39,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:39,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 00:21:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:39,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:21:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:39,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:39,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813047371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:39,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:39,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:21:39,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885050409] [2023-08-31 00:21:39,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:39,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:21:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:21:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:21:39,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-08-31 00:21:39,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 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) [2023-08-31 00:21:39,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:39,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-08-31 00:21:39,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:41,894 INFO L130 PetriNetUnfolder]: 20049/30556 cut-off events. [2023-08-31 00:21:41,894 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-08-31 00:21:41,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59459 conditions, 30556 events. 20049/30556 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 209770 event pairs, 17166 based on Foata normal form. 3/25146 useless extension candidates. Maximal degree in co-relation 59431. Up to 28195 conditions per place. [2023-08-31 00:21:42,065 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-31 00:21:42,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-08-31 00:21:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:21:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:21:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1605 transitions. [2023-08-31 00:21:42,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785330948121646 [2023-08-31 00:21:42,070 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1605 transitions. [2023-08-31 00:21:42,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1605 transitions. [2023-08-31 00:21:42,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:42,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1605 transitions. [2023-08-31 00:21:42,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 267.5) internal successors, (1605), 6 states have internal predecessors, (1605), 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) [2023-08-31 00:21:42,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 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) [2023-08-31 00:21:42,079 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 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) [2023-08-31 00:21:42,079 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1605 transitions. [2023-08-31 00:21:42,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-08-31 00:21:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:42,082 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-08-31 00:21:42,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-08-31 00:21:42,083 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-08-31 00:21:42,083 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-08-31 00:21:42,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 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) [2023-08-31 00:21:42,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:42,084 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:42,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:42,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:42,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:21:42,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 73730964, now seen corresponding path program 2 times [2023-08-31 00:21:42,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339466697] [2023-08-31 00:21:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:42,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:42,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339466697] [2023-08-31 00:21:42,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339466697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:42,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337126400] [2023-08-31 00:21:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:21:42,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:42,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:42,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 00:21:42,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:21:42,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:21:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:21:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:42,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:21:42,645 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:21:42,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:21:42,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:21:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:21:42,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:21:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337126400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:42,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:21:42,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:21:42,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952006935] [2023-08-31 00:21:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:42,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:21:42,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:21:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:21:42,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 559 [2023-08-31 00:21:42,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 243.66666666666666) internal successors, (1462), 6 states have internal predecessors, (1462), 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) [2023-08-31 00:21:42,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:42,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 559 [2023-08-31 00:21:42,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:45,167 INFO L130 PetriNetUnfolder]: 25470/39959 cut-off events. [2023-08-31 00:21:45,167 INFO L131 PetriNetUnfolder]: For 1007/1007 co-relation queries the response was YES. [2023-08-31 00:21:45,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78013 conditions, 39959 events. 25470/39959 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 1193. Compared 299103 event pairs, 4099 based on Foata normal form. 0/32862 useless extension candidates. Maximal degree in co-relation 77977. Up to 27989 conditions per place. [2023-08-31 00:21:45,544 INFO L137 encePairwiseOnDemand]: 549/559 looper letters, 193 selfloop transitions, 16 changer transitions 0/227 dead transitions. [2023-08-31 00:21:45,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 227 transitions, 968 flow [2023-08-31 00:21:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:21:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:21:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1658 transitions. [2023-08-31 00:21:45,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433512224209897 [2023-08-31 00:21:45,551 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1658 transitions. [2023-08-31 00:21:45,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1658 transitions. [2023-08-31 00:21:45,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:45,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1658 transitions. [2023-08-31 00:21:45,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.3333333333333) internal successors, (1658), 6 states have internal predecessors, (1658), 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) [2023-08-31 00:21:45,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 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) [2023-08-31 00:21:45,562 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 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) [2023-08-31 00:21:45,562 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1658 transitions. [2023-08-31 00:21:45,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 227 transitions, 968 flow [2023-08-31 00:21:45,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 227 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:21:45,572 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-08-31 00:21:45,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-08-31 00:21:45,574 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-08-31 00:21:45,574 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-08-31 00:21:45,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 243.66666666666666) internal successors, (1462), 6 states have internal predecessors, (1462), 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) [2023-08-31 00:21:45,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:45,575 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:45,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 00:21:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:45,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:21:45,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1832831312, now seen corresponding path program 1 times [2023-08-31 00:21:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347900622] [2023-08-31 00:21:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:21:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347900622] [2023-08-31 00:21:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347900622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:21:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374528095] [2023-08-31 00:21:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:45,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:21:45,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:21:45,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 00:21:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:45,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:21:45,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:21:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:45,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:21:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:21:46,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374528095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:21:46,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:21:46,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 00:21:46,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893505649] [2023-08-31 00:21:46,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:21:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:21:46,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:21:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:21:46,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 559 [2023-08-31 00:21:46,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 252.92857142857142) internal successors, (3541), 14 states have internal predecessors, (3541), 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) [2023-08-31 00:21:46,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:46,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 559 [2023-08-31 00:21:46,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:21:48,569 INFO L130 PetriNetUnfolder]: 25483/40304 cut-off events. [2023-08-31 00:21:48,570 INFO L131 PetriNetUnfolder]: For 8365/8367 co-relation queries the response was YES. [2023-08-31 00:21:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86542 conditions, 40304 events. 25483/40304 cut-off events. For 8365/8367 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 308071 event pairs, 621 based on Foata normal form. 32/35590 useless extension candidates. Maximal degree in co-relation 86483. Up to 36042 conditions per place. [2023-08-31 00:21:49,004 INFO L137 encePairwiseOnDemand]: 554/559 looper letters, 142 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2023-08-31 00:21:49,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-08-31 00:21:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:21:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:21:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3657 transitions. [2023-08-31 00:21:49,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672885254280603 [2023-08-31 00:21:49,015 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3657 transitions. [2023-08-31 00:21:49,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3657 transitions. [2023-08-31 00:21:49,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:21:49,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3657 transitions. [2023-08-31 00:21:49,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 261.2142857142857) internal successors, (3657), 14 states have internal predecessors, (3657), 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) [2023-08-31 00:21:49,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 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) [2023-08-31 00:21:49,038 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 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) [2023-08-31 00:21:49,039 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3657 transitions. [2023-08-31 00:21:49,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-08-31 00:21:49,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 849 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:21:49,055 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2023-08-31 00:21:49,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2023-08-31 00:21:49,056 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2023-08-31 00:21:49,056 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2023-08-31 00:21:49,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 252.92857142857142) internal successors, (3541), 14 states have internal predecessors, (3541), 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) [2023-08-31 00:21:49,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:49,057 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 00:21:49,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 00:21:49,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:21:49,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-31 00:21:49,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 1 times [2023-08-31 00:21:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:49,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402391970] [2023-08-31 00:21:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:49,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:21:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:21:49,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:21:49,304 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:21:49,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-31 00:21:49,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-31 00:21:49,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-31 00:21:49,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-31 00:21:49,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-31 00:21:49,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-31 00:21:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 00:21:49,305 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-08-31 00:21:49,306 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:21:49,306 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 00:21:49,347 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 00:21:49,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-08-31 00:21:49,457 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-08-31 00:21:49,458 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:21:49,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-08-31 00:21:49,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 388 transitions, 806 flow [2023-08-31 00:21:49,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 388 transitions, 806 flow [2023-08-31 00:21:49,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:21:49,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 388 transitions, 806 flow [2023-08-31 00:21:49,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 388 transitions, 806 flow [2023-08-31 00:21:49,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-08-31 00:21:49,582 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-08-31 00:21:49,582 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 00:21:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-08-31 00:21:49,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 89838 [2023-08-31 00:21:53,236 INFO L134 LiptonReduction]: Checked pairs total: 142134 [2023-08-31 00:21:53,236 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-08-31 00:21:53,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:21:53,238 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;@7ab006cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:21:53,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-31 00:21:53,242 INFO L130 PetriNetUnfolder]: 12/38 cut-off events. [2023-08-31 00:21:53,243 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:21:53,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:21:53,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:21:53,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:21:53,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:21:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash 100448795, now seen corresponding path program 1 times [2023-08-31 00:21:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:21:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634592830] [2023-08-31 00:21:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:21:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:21:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:21:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:21:53,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:21:53,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634592830] [2023-08-31 00:21:53,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634592830] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:21:53,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:21:53,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:21:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78614663] [2023-08-31 00:21:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:21:53,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:21:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:21:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:21:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:21:53,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 682 [2023-08-31 00:21:53,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 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) [2023-08-31 00:21:53,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:21:53,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 682 [2023-08-31 00:21:53,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:22:32,497 INFO L130 PetriNetUnfolder]: 477490/661421 cut-off events. [2023-08-31 00:22:32,497 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-08-31 00:22:33,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274279 conditions, 661421 events. 477490/661421 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14829. Compared 5287189 event pairs, 422085 based on Foata normal form. 116547/658008 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-08-31 00:22:36,314 INFO L137 encePairwiseOnDemand]: 628/682 looper letters, 91 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-08-31 00:22:36,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-08-31 00:22:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:22:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:22:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-08-31 00:22:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-08-31 00:22:36,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-08-31 00:22:36,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-08-31 00:22:36,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:22:36,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-08-31 00:22:36,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 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) [2023-08-31 00:22:36,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 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) [2023-08-31 00:22:36,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 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) [2023-08-31 00:22:36,324 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1078 transitions. [2023-08-31 00:22:36,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-08-31 00:22:36,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:22:36,328 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 270 flow [2023-08-31 00:22:36,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2023-08-31 00:22:36,328 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-08-31 00:22:36,329 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 270 flow [2023-08-31 00:22:36,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 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) [2023-08-31 00:22:36,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:22:36,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:22:36,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 00:22:36,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:22:36,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:22:36,330 INFO L85 PathProgramCache]: Analyzing trace with hash -673101525, now seen corresponding path program 1 times [2023-08-31 00:22:36,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:22:36,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916598364] [2023-08-31 00:22:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:36,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:22:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:22:36,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:22:36,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916598364] [2023-08-31 00:22:36,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916598364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:22:36,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246737970] [2023-08-31 00:22:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:22:36,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:22:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:22:36,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:22:36,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 00:22:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:22:36,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-31 00:22:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:22:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:22:36,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:22:36,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246737970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:22:36,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:22:36,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-31 00:22:36,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145839878] [2023-08-31 00:22:36,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:22:36,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:22:36,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:22:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:22:36,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 00:22:36,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 682 [2023-08-31 00:22:36,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 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) [2023-08-31 00:22:36,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:22:36,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 682 [2023-08-31 00:22:36,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:23:19,052 INFO L130 PetriNetUnfolder]: 485132/667396 cut-off events. [2023-08-31 00:23:19,052 INFO L131 PetriNetUnfolder]: For 3923/3923 co-relation queries the response was YES. [2023-08-31 00:23:20,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280211 conditions, 667396 events. 485132/667396 cut-off events. For 3923/3923 co-relation queries the response was YES. Maximal size of possible extension queue 14984. Compared 5254776 event pairs, 335220 based on Foata normal form. 0/546881 useless extension candidates. Maximal degree in co-relation 1280197. Up to 610515 conditions per place. [2023-08-31 00:23:23,283 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 109 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-31 00:23:23,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 528 flow [2023-08-31 00:23:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 00:23:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 00:23:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-31 00:23:23,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102639296187683 [2023-08-31 00:23:23,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-31 00:23:23,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-31 00:23:23,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:23:23,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-31 00:23:23,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 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) [2023-08-31 00:23:23,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 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) [2023-08-31 00:23:23,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 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) [2023-08-31 00:23:23,292 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 270 flow. Second operand 3 states and 1044 transitions. [2023-08-31 00:23:23,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 528 flow [2023-08-31 00:23:23,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 524 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 00:23:23,298 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 278 flow [2023-08-31 00:23:23,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2023-08-31 00:23:23,298 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 5 predicate places. [2023-08-31 00:23:23,299 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 278 flow [2023-08-31 00:23:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 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) [2023-08-31 00:23:23,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:23:23,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:23:23,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 00:23:23,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:23:23,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:23:23,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:23:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash -751777354, now seen corresponding path program 1 times [2023-08-31 00:23:23,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:23:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904726416] [2023-08-31 00:23:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:23:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:23:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:23:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:23:23,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:23:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904726416] [2023-08-31 00:23:23,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904726416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:23:23,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356690024] [2023-08-31 00:23:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:23:23,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:23:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:23:23,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:23:23,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 00:23:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:23:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 00:23:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:23:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:23:23,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:23:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:23:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356690024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:23:23,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:23:23,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 00:23:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612507967] [2023-08-31 00:23:23,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:23:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 00:23:23,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:23:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 00:23:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 00:23:23,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-08-31 00:23:23,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 312.14285714285717) internal successors, (2185), 7 states have internal predecessors, (2185), 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) [2023-08-31 00:23:23,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:23:23,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-08-31 00:23:23,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:24:07,282 INFO L130 PetriNetUnfolder]: 482742/664370 cut-off events. [2023-08-31 00:24:07,282 INFO L131 PetriNetUnfolder]: For 13090/13090 co-relation queries the response was YES. [2023-08-31 00:24:09,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286508 conditions, 664370 events. 482742/664370 cut-off events. For 13090/13090 co-relation queries the response was YES. Maximal size of possible extension queue 14916. Compared 5235914 event pairs, 422085 based on Foata normal form. 3/548188 useless extension candidates. Maximal degree in co-relation 1286479. Up to 610533 conditions per place. [2023-08-31 00:24:12,661 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 92 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-08-31 00:24:12,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 484 flow [2023-08-31 00:24:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:24:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:24:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1959 transitions. [2023-08-31 00:24:12,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47873900293255134 [2023-08-31 00:24:12,666 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1959 transitions. [2023-08-31 00:24:12,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1959 transitions. [2023-08-31 00:24:12,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:24:12,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1959 transitions. [2023-08-31 00:24:12,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.5) internal successors, (1959), 6 states have internal predecessors, (1959), 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) [2023-08-31 00:24:12,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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) [2023-08-31 00:24:12,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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) [2023-08-31 00:24:12,675 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 278 flow. Second operand 6 states and 1959 transitions. [2023-08-31 00:24:12,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 484 flow [2023-08-31 00:24:12,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 00:24:12,691 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 312 flow [2023-08-31 00:24:12,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-08-31 00:24:12,692 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 12 predicate places. [2023-08-31 00:24:12,692 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 312 flow [2023-08-31 00:24:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 312.14285714285717) internal successors, (2185), 7 states have internal predecessors, (2185), 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) [2023-08-31 00:24:12,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:24:12,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:24:12,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 00:24:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 00:24:12,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:24:12,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:24:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1151730342, now seen corresponding path program 2 times [2023-08-31 00:24:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:24:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490892034] [2023-08-31 00:24:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:24:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:24:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:24:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:24:12,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:24:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490892034] [2023-08-31 00:24:12,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490892034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:24:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323413400] [2023-08-31 00:24:12,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 00:24:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:24:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:24:12,957 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:24:12,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 00:24:13,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-31 00:24:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 00:24:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-31 00:24:13,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:24:13,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:24:13,090 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:24:13,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:24:13,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:24:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:24:13,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-31 00:24:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323413400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:24:13,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-31 00:24:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-31 00:24:13,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982005550] [2023-08-31 00:24:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:24:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 00:24:13,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:24:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 00:24:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 00:24:13,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 682 [2023-08-31 00:24:13,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 297.6666666666667) internal successors, (1786), 6 states have internal predecessors, (1786), 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) [2023-08-31 00:24:13,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:24:13,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 682 [2023-08-31 00:24:13,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:25:10,667 INFO L130 PetriNetUnfolder]: 577157/806625 cut-off events. [2023-08-31 00:25:10,667 INFO L131 PetriNetUnfolder]: For 17538/17538 co-relation queries the response was YES. [2023-08-31 00:25:12,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570038 conditions, 806625 events. 577157/806625 cut-off events. For 17538/17538 co-relation queries the response was YES. Maximal size of possible extension queue 18941. Compared 6768393 event pairs, 93910 based on Foata normal form. 0/665647 useless extension candidates. Maximal degree in co-relation 1570001. Up to 599551 conditions per place. [2023-08-31 00:25:15,818 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 263 selfloop transitions, 20 changer transitions 0/305 dead transitions. [2023-08-31 00:25:15,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 305 transitions, 1304 flow [2023-08-31 00:25:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:25:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:25:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2056 transitions. [2023-08-31 00:25:15,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024437927663734 [2023-08-31 00:25:15,823 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2056 transitions. [2023-08-31 00:25:15,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2056 transitions. [2023-08-31 00:25:15,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:25:15,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2056 transitions. [2023-08-31 00:25:15,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 342.6666666666667) internal successors, (2056), 6 states have internal predecessors, (2056), 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) [2023-08-31 00:25:15,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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) [2023-08-31 00:25:15,831 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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) [2023-08-31 00:25:15,832 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 312 flow. Second operand 6 states and 2056 transitions. [2023-08-31 00:25:15,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 305 transitions, 1304 flow [2023-08-31 00:25:15,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 305 transitions, 1290 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 00:25:15,848 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 423 flow [2023-08-31 00:25:15,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2023-08-31 00:25:15,849 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 20 predicate places. [2023-08-31 00:25:15,850 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 423 flow [2023-08-31 00:25:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 297.6666666666667) internal successors, (1786), 6 states have internal predecessors, (1786), 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) [2023-08-31 00:25:15,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:25:15,851 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:25:15,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 00:25:16,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 00:25:16,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:25:16,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:25:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash 488814818, now seen corresponding path program 1 times [2023-08-31 00:25:16,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:25:16,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152707670] [2023-08-31 00:25:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:25:16,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:25:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:25:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-31 00:25:16,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:25:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152707670] [2023-08-31 00:25:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152707670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:25:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176060023] [2023-08-31 00:25:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:25:16,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:25:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:25:16,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:25:16,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 00:25:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:25:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 00:25:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:25:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:25:16,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:25:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 00:25:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176060023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:25:16,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:25:16,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-31 00:25:16,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911160318] [2023-08-31 00:25:16,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:25:16,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 00:25:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:25:16,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 00:25:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-08-31 00:25:16,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 682 [2023-08-31 00:25:16,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 423 flow. Second operand has 14 states, 14 states have (on average 308.92857142857144) internal successors, (4325), 14 states have internal predecessors, (4325), 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) [2023-08-31 00:25:16,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:25:16,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 682 [2023-08-31 00:25:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:26:21,266 INFO L130 PetriNetUnfolder]: 591054/815197 cut-off events. [2023-08-31 00:26:21,267 INFO L131 PetriNetUnfolder]: For 149423/149495 co-relation queries the response was YES. [2023-08-31 00:26:24,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728125 conditions, 815197 events. 591054/815197 cut-off events. For 149423/149495 co-relation queries the response was YES. Maximal size of possible extension queue 19064. Compared 6663139 event pairs, 163387 based on Foata normal form. 32/701836 useless extension candidates. Maximal degree in co-relation 1728065. Up to 766668 conditions per place. [2023-08-31 00:26:27,494 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 165 selfloop transitions, 14 changer transitions 0/201 dead transitions. [2023-08-31 00:26:27,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 201 transitions, 977 flow [2023-08-31 00:26:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 00:26:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 00:26:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4460 transitions. [2023-08-31 00:26:27,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671135316296607 [2023-08-31 00:26:27,502 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4460 transitions. [2023-08-31 00:26:27,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4460 transitions. [2023-08-31 00:26:27,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:26:27,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4460 transitions. [2023-08-31 00:26:27,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 318.57142857142856) internal successors, (4460), 14 states have internal predecessors, (4460), 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) [2023-08-31 00:26:27,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 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) [2023-08-31 00:26:27,523 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 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) [2023-08-31 00:26:27,523 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 423 flow. Second operand 14 states and 4460 transitions. [2023-08-31 00:26:27,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 201 transitions, 977 flow [2023-08-31 00:26:29,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 977 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 00:26:29,580 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 499 flow [2023-08-31 00:26:29,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=499, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2023-08-31 00:26:29,581 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 34 predicate places. [2023-08-31 00:26:29,581 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 499 flow [2023-08-31 00:26:29,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 308.92857142857144) internal successors, (4325), 14 states have internal predecessors, (4325), 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) [2023-08-31 00:26:29,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:26:29,582 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:26:29,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 00:26:29,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 00:26:29,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:26:29,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:26:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash -672124409, now seen corresponding path program 1 times [2023-08-31 00:26:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:26:29,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924043961] [2023-08-31 00:26:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:26:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:26:30,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:26:30,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924043961] [2023-08-31 00:26:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924043961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:26:30,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242076502] [2023-08-31 00:26:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:26:30,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:26:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:26:30,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:26:30,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 00:26:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:26:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 00:26:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:26:30,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-31 00:26:30,175 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-31 00:26:30,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-31 00:26:30,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:26:30,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-31 00:26:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-31 00:26:30,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:26:38,316 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_410 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_410) |c_~#cache~0.base|))) is different from false [2023-08-31 00:26:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-31 00:26:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242076502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:26:38,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:26:38,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-31 00:26:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325807047] [2023-08-31 00:26:38,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:26:38,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 00:26:38,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:26:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 00:26:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=4, NotChecked=18, Total=132 [2023-08-31 00:26:40,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:42,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:44,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:46,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:48,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:50,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:52,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 00:26:52,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 682 [2023-08-31 00:26:52,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 499 flow. Second operand has 12 states, 12 states have (on average 261.9166666666667) internal successors, (3143), 12 states have internal predecessors, (3143), 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) [2023-08-31 00:26:52,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:26:52,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 682 [2023-08-31 00:26:52,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:14,494 INFO L130 PetriNetUnfolder]: 800226/1094875 cut-off events. [2023-08-31 00:28:14,494 INFO L131 PetriNetUnfolder]: For 220928/220946 co-relation queries the response was YES. [2023-08-31 00:28:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341341 conditions, 1094875 events. 800226/1094875 cut-off events. For 220928/220946 co-relation queries the response was YES. Maximal size of possible extension queue 24430. Compared 8973965 event pairs, 121699 based on Foata normal form. 12/951571 useless extension candidates. Maximal degree in co-relation 2341267. Up to 711006 conditions per place. [2023-08-31 00:28:23,606 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 343 selfloop transitions, 43 changer transitions 0/405 dead transitions. [2023-08-31 00:28:23,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 405 transitions, 1974 flow [2023-08-31 00:28:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 00:28:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 00:28:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2169 transitions. [2023-08-31 00:28:23,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543359865940511 [2023-08-31 00:28:23,610 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2169 transitions. [2023-08-31 00:28:23,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2169 transitions. [2023-08-31 00:28:23,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:23,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2169 transitions. [2023-08-31 00:28:23,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 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) [2023-08-31 00:28:23,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 682.0) internal successors, (5456), 8 states have internal predecessors, (5456), 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) [2023-08-31 00:28:23,619 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 682.0) internal successors, (5456), 8 states have internal predecessors, (5456), 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) [2023-08-31 00:28:23,620 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 499 flow. Second operand 7 states and 2169 transitions. [2023-08-31 00:28:23,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 405 transitions, 1974 flow [2023-08-31 00:28:30,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 405 transitions, 1897 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-08-31 00:28:30,325 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 727 flow [2023-08-31 00:28:30,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2023-08-31 00:28:30,325 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 36 predicate places. [2023-08-31 00:28:30,326 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 727 flow [2023-08-31 00:28:30,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 261.9166666666667) internal successors, (3143), 12 states have internal predecessors, (3143), 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) [2023-08-31 00:28:30,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:30,326 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:30,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 00:28:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 00:28:30,527 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:28:30,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1395362984, now seen corresponding path program 1 times [2023-08-31 00:28:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489748165] [2023-08-31 00:28:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:28:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489748165] [2023-08-31 00:28:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489748165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 00:28:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829135347] [2023-08-31 00:28:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:30,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 00:28:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 00:28:30,596 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 00:28:30,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 00:28:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:30,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-31 00:28:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 00:28:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:28:30,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 00:28:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-31 00:28:30,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829135347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 00:28:30,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 00:28:30,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-31 00:28:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410789326] [2023-08-31 00:28:30,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 00:28:30,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 00:28:30,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 00:28:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-31 00:28:30,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-08-31 00:28:30,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 312.8888888888889) internal successors, (2816), 9 states have internal predecessors, (2816), 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) [2023-08-31 00:28:30,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:30,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-08-31 00:28:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 00:28:37,336 INFO L130 PetriNetUnfolder]: 62805/93179 cut-off events. [2023-08-31 00:28:37,337 INFO L131 PetriNetUnfolder]: For 81841/81843 co-relation queries the response was YES. [2023-08-31 00:28:37,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251150 conditions, 93179 events. 62805/93179 cut-off events. For 81841/81843 co-relation queries the response was YES. Maximal size of possible extension queue 2476. Compared 710434 event pairs, 1386 based on Foata normal form. 7580/93552 useless extension candidates. Maximal degree in co-relation 241125. Up to 58758 conditions per place. [2023-08-31 00:28:38,041 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 212 selfloop transitions, 4 changer transitions 0/229 dead transitions. [2023-08-31 00:28:38,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 229 transitions, 1319 flow [2023-08-31 00:28:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 00:28:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 00:28:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2022 transitions. [2023-08-31 00:28:38,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941348973607038 [2023-08-31 00:28:38,045 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2022 transitions. [2023-08-31 00:28:38,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2022 transitions. [2023-08-31 00:28:38,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 00:28:38,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2022 transitions. [2023-08-31 00:28:38,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 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) [2023-08-31 00:28:38,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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) [2023-08-31 00:28:38,054 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 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) [2023-08-31 00:28:38,054 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 727 flow. Second operand 6 states and 2022 transitions. [2023-08-31 00:28:38,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 229 transitions, 1319 flow [2023-08-31 00:28:38,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 1267 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-31 00:28:38,414 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 366 flow [2023-08-31 00:28:38,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-08-31 00:28:38,415 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -5 predicate places. [2023-08-31 00:28:38,415 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 366 flow [2023-08-31 00:28:38,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 312.8888888888889) internal successors, (2816), 9 states have internal predecessors, (2816), 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) [2023-08-31 00:28:38,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:38,416 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:38,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 00:28:38,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 00:28:38,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-31 00:28:38,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 562120399, now seen corresponding path program 1 times [2023-08-31 00:28:38,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:38,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576008256] [2023-08-31 00:28:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:38,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:38,635 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 00:28:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 00:28:38,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 00:28:38,679 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 00:28:38,680 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-31 00:28:38,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-31 00:28:38,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-31 00:28:38,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-31 00:28:38,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-31 00:28:38,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-31 00:28:38,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-31 00:28:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 00:28:38,681 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:38,683 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 00:28:38,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 00:28:38,719 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 00:28:38,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-08-31 00:28:38,875 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-08-31 00:28:38,875 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:28:38,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-08-31 00:28:38,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 459 transitions, 962 flow [2023-08-31 00:28:38,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 459 transitions, 962 flow [2023-08-31 00:28:38,913 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 00:28:38,913 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 459 transitions, 962 flow [2023-08-31 00:28:38,913 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 459 transitions, 962 flow [2023-08-31 00:28:38,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-08-31 00:28:39,061 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-08-31 00:28:39,061 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 00:28:39,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-08-31 00:28:39,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 139656 [2023-08-31 00:28:42,864 INFO L134 LiptonReduction]: Checked pairs total: 247744 [2023-08-31 00:28:42,864 INFO L136 LiptonReduction]: Total number of compositions: 348 [2023-08-31 00:28:42,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 00:28:42,868 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;@7ab006cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 00:28:42,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-31 00:28:42,870 INFO L130 PetriNetUnfolder]: 12/40 cut-off events. [2023-08-31 00:28:42,870 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 00:28:42,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 00:28:42,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-31 00:28:42,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-31 00:28:42,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 00:28:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash 230351614, now seen corresponding path program 1 times [2023-08-31 00:28:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 00:28:42,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609098566] [2023-08-31 00:28:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 00:28:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 00:28:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 00:28:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 00:28:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 00:28:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609098566] [2023-08-31 00:28:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609098566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 00:28:42,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 00:28:42,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 00:28:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892623984] [2023-08-31 00:28:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 00:28:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 00:28:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 00:28:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 00:28:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 00:28:42,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 807 [2023-08-31 00:28:42,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 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) [2023-08-31 00:28:42,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 00:28:42,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 807 [2023-08-31 00:28:42,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand