./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.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 dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:21:09,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:21:09,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:21:09,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:21:09,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:21:09,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:21:09,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:21:09,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:21:09,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:21:09,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:21:09,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:21:09,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:21:09,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:21:09,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:21:09,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:21:09,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:21:09,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:21:09,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:21:09,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:21:09,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:21:09,106 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:21:09,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:21:09,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:21:09,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:21:09,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:21:09,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:21:09,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:21:09,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:21:09,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:21:09,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:21:09,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:21:09,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:21:09,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:21:09,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:21:09,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:21:09,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:21:09,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:21:09,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:21:09,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:21:09,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:21:09,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:21:09,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:21:09,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:21:09,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:21:09,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:21:09,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:21:09,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:21:09,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:21:09,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:21:09,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:21:09,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:21:09,150 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:21:09,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:21:09,151 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:21:09,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:21:09,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:21:09,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:21:09,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:21:09,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:21:09,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:21:09,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:21:09,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:21:09,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:21:09,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:21:09,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:21:09,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:21:09,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:21:09,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:21:09,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:21:09,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:21:09,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:21:09,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:21:09,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:21:09,155 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:21:09,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:21:09,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:21:09,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad265ed8a17f32bb0a174302dfe188f9a15f60b81cc9c28a67851ab05270da2 [2022-07-19 21:21:09,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:21:09,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:21:09,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:21:09,348 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:21:09,349 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:21:09,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-07-19 21:21:09,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a47a61f6/f7ffa780490f4b118f8526e44653c10b/FLAGd5b95e510 [2022-07-19 21:21:09,759 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:21:09,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i [2022-07-19 21:21:09,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a47a61f6/f7ffa780490f4b118f8526e44653c10b/FLAGd5b95e510 [2022-07-19 21:21:10,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a47a61f6/f7ffa780490f4b118f8526e44653c10b [2022-07-19 21:21:10,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:21:10,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:21:10,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:21:10,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:21:10,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:21:10,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3b6df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10, skipping insertion in model container [2022-07-19 21:21:10,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:21:10,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:21:10,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2022-07-19 21:21:10,505 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,505 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,505 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,506 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:21:10,543 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:21:10,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_93-evilcollapse_racefree.i[47038,47051] [2022-07-19 21:21:10,585 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,587 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,587 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,588 WARN L1550 CHandler]: Possible shadowing of function new [2022-07-19 21:21:10,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:21:10,637 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:21:10,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10 WrapperNode [2022-07-19 21:21:10,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:21:10,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:21:10,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:21:10,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:21:10,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,694 INFO L137 Inliner]: procedures = 279, calls = 51, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 223 [2022-07-19 21:21:10,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:21:10,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:21:10,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:21:10,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:21:10,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:21:10,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:21:10,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:21:10,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:21:10,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (1/1) ... [2022-07-19 21:21:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:21:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:10,766 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) [2022-07-19 21:21:10,768 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 [2022-07-19 21:21:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:21:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:21:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:21:10,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:21:10,801 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:21:10,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:21:10,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:21:10,802 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:21:10,894 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:21:10,895 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:21:11,198 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:21:11,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:21:11,205 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-19 21:21:11,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:21:11 BoogieIcfgContainer [2022-07-19 21:21:11,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:21:11,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:21:11,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:21:11,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:21:11,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:21:10" (1/3) ... [2022-07-19 21:21:11,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46640850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:21:11, skipping insertion in model container [2022-07-19 21:21:11,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:21:10" (2/3) ... [2022-07-19 21:21:11,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46640850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:21:11, skipping insertion in model container [2022-07-19 21:21:11,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:21:11" (3/3) ... [2022-07-19 21:21:11,213 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_93-evilcollapse_racefree.i [2022-07-19 21:21:11,238 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:21:11,245 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:21:11,246 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:21:11,246 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:21:11,328 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:21:11,355 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 256 transitions, 520 flow [2022-07-19 21:21:11,406 INFO L129 PetriNetUnfolder]: 29/273 cut-off events. [2022-07-19 21:21:11,407 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-19 21:21:11,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 29/273 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 585 event pairs, 0 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 155. Up to 4 conditions per place. [2022-07-19 21:21:11,413 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 256 transitions, 520 flow [2022-07-19 21:21:11,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 251 transitions, 507 flow [2022-07-19 21:21:11,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:21:11,439 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24f1d991, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1d17a017 [2022-07-19 21:21:11,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:21:11,470 INFO L129 PetriNetUnfolder]: 10/177 cut-off events. [2022-07-19 21:21:11,474 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:21:11,474 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:11,475 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:11,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1684978418, now seen corresponding path program 1 times [2022-07-19 21:21:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235330683] [2022-07-19 21:21:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:11,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:11,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235330683] [2022-07-19 21:21:11,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235330683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:11,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:11,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:21:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248584939] [2022-07-19 21:21:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:11,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:21:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:21:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:21:11,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 256 [2022-07-19 21:21:11,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 251 transitions, 507 flow. Second operand has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 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) [2022-07-19 21:21:11,671 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:11,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 256 [2022-07-19 21:21:11,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:11,727 INFO L129 PetriNetUnfolder]: 6/245 cut-off events. [2022-07-19 21:21:11,727 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:21:11,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 245 events. 6/245 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 440 event pairs, 0 based on Foata normal form. 22/253 useless extension candidates. Maximal degree in co-relation 149. Up to 2 conditions per place. [2022-07-19 21:21:11,731 INFO L132 encePairwiseOnDemand]: 236/256 looper letters, 1 selfloop transitions, 0 changer transitions 2/230 dead transitions. [2022-07-19 21:21:11,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 467 flow [2022-07-19 21:21:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:21:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:21:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 487 transitions. [2022-07-19 21:21:11,746 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.951171875 [2022-07-19 21:21:11,747 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 487 transitions. [2022-07-19 21:21:11,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 487 transitions. [2022-07-19 21:21:11,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:11,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 487 transitions. [2022-07-19 21:21:11,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:21:11,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2022-07-19 21:21:11,765 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2022-07-19 21:21:11,766 INFO L186 Difference]: Start difference. First operand has 228 places, 251 transitions, 507 flow. Second operand 2 states and 487 transitions. [2022-07-19 21:21:11,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 467 flow [2022-07-19 21:21:11,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 467 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:11,776 INFO L242 Difference]: Finished difference. Result has 228 places, 228 transitions, 461 flow [2022-07-19 21:21:11,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=461, PETRI_PLACES=228, PETRI_TRANSITIONS=228} [2022-07-19 21:21:11,781 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 0 predicate places. [2022-07-19 21:21:11,782 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 228 transitions, 461 flow [2022-07-19 21:21:11,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 234.0) internal successors, (468), 2 states have internal predecessors, (468), 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) [2022-07-19 21:21:11,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:11,783 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:11,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:21:11,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1809051665, now seen corresponding path program 1 times [2022-07-19 21:21:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001095250] [2022-07-19 21:21:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:11,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001095250] [2022-07-19 21:21:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001095250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:11,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:11,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495286157] [2022-07-19 21:21:11,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:11,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:11,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 256 [2022-07-19 21:21:11,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 228 transitions, 461 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-07-19 21:21:11,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:11,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 256 [2022-07-19 21:21:11,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:11,985 INFO L129 PetriNetUnfolder]: 7/293 cut-off events. [2022-07-19 21:21:11,985 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:21:11,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 293 events. 7/293 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 617 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 314. Up to 12 conditions per place. [2022-07-19 21:21:11,987 INFO L132 encePairwiseOnDemand]: 253/256 looper letters, 16 selfloop transitions, 2 changer transitions 0/235 dead transitions. [2022-07-19 21:21:11,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 235 transitions, 511 flow [2022-07-19 21:21:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2022-07-19 21:21:11,988 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2022-07-19 21:21:11,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2022-07-19 21:21:11,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2022-07-19 21:21:11,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:11,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2022-07-19 21:21:11,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 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) [2022-07-19 21:21:11,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-19 21:21:11,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-19 21:21:11,993 INFO L186 Difference]: Start difference. First operand has 228 places, 228 transitions, 461 flow. Second operand 3 states and 688 transitions. [2022-07-19 21:21:11,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 235 transitions, 511 flow [2022-07-19 21:21:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 235 transitions, 511 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:21:12,002 INFO L242 Difference]: Finished difference. Result has 229 places, 229 transitions, 473 flow [2022-07-19 21:21:12,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=229, PETRI_TRANSITIONS=229} [2022-07-19 21:21:12,003 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 1 predicate places. [2022-07-19 21:21:12,003 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 229 transitions, 473 flow [2022-07-19 21:21:12,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2022-07-19 21:21:12,004 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:12,004 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:12,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:21:12,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1280121739, now seen corresponding path program 1 times [2022-07-19 21:21:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:12,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453190520] [2022-07-19 21:21:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:12,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453190520] [2022-07-19 21:21:12,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453190520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:21:12,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:21:12,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:21:12,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58456110] [2022-07-19 21:21:12,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:21:12,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:21:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:21:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:21:12,102 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 256 [2022-07-19 21:21:12,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 229 transitions, 473 flow. Second operand has 3 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) [2022-07-19 21:21:12,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:12,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 256 [2022-07-19 21:21:12,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:12,147 INFO L129 PetriNetUnfolder]: 7/365 cut-off events. [2022-07-19 21:21:12,147 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:21:12,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 365 events. 7/365 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 717 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 395. Up to 15 conditions per place. [2022-07-19 21:21:12,149 INFO L132 encePairwiseOnDemand]: 253/256 looper letters, 10 selfloop transitions, 2 changer transitions 0/233 dead transitions. [2022-07-19 21:21:12,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 233 transitions, 505 flow [2022-07-19 21:21:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:21:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:21:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-07-19 21:21:12,152 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8997395833333334 [2022-07-19 21:21:12,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-07-19 21:21:12,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-07-19 21:21:12,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:12,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-07-19 21:21:12,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2022-07-19 21:21:12,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-19 21:21:12,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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) [2022-07-19 21:21:12,156 INFO L186 Difference]: Start difference. First operand has 229 places, 229 transitions, 473 flow. Second operand 3 states and 691 transitions. [2022-07-19 21:21:12,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 233 transitions, 505 flow [2022-07-19 21:21:12,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 233 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:12,160 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 483 flow [2022-07-19 21:21:12,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=483, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-07-19 21:21:12,162 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 3 predicate places. [2022-07-19 21:21:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 483 flow [2022-07-19 21:21:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-07-19 21:21:12,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:12,163 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:21:12,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2086167297, now seen corresponding path program 1 times [2022-07-19 21:21:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:12,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264165099] [2022-07-19 21:21:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:12,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:21:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307575265] [2022-07-19 21:21:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:12,211 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) [2022-07-19 21:21:12,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:21:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:21:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:12,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:12,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264165099] [2022-07-19 21:21:12,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:21:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307575265] [2022-07-19 21:21:12,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307575265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:12,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:12,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 21:21:12,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824393764] [2022-07-19 21:21:12,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:12,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:12,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:21:12,606 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 256 [2022-07-19 21:21:12,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 483 flow. Second operand has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 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) [2022-07-19 21:21:12,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:12,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 256 [2022-07-19 21:21:12,608 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:12,701 INFO L129 PetriNetUnfolder]: 7/443 cut-off events. [2022-07-19 21:21:12,701 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:21:12,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 443 events. 7/443 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 521 event pairs, 0 based on Foata normal form. 4/437 useless extension candidates. Maximal degree in co-relation 500. Up to 10 conditions per place. [2022-07-19 21:21:12,706 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 11 selfloop transitions, 9 changer transitions 0/240 dead transitions. [2022-07-19 21:21:12,706 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 240 transitions, 545 flow [2022-07-19 21:21:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2047 transitions. [2022-07-19 21:21:12,710 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8884548611111112 [2022-07-19 21:21:12,711 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2047 transitions. [2022-07-19 21:21:12,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2047 transitions. [2022-07-19 21:21:12,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:12,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2047 transitions. [2022-07-19 21:21:12,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.44444444444446) internal successors, (2047), 9 states have internal predecessors, (2047), 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) [2022-07-19 21:21:12,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-19 21:21:12,719 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-19 21:21:12,719 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 483 flow. Second operand 9 states and 2047 transitions. [2022-07-19 21:21:12,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 240 transitions, 545 flow [2022-07-19 21:21:12,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 240 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:12,723 INFO L242 Difference]: Finished difference. Result has 241 places, 236 transitions, 531 flow [2022-07-19 21:21:12,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=531, PETRI_PLACES=241, PETRI_TRANSITIONS=236} [2022-07-19 21:21:12,725 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 13 predicate places. [2022-07-19 21:21:12,725 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 236 transitions, 531 flow [2022-07-19 21:21:12,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 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) [2022-07-19 21:21:12,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:12,726 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:12,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:12,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:12,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -216012479, now seen corresponding path program 2 times [2022-07-19 21:21:12,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285908600] [2022-07-19 21:21:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:12,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:21:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257496351] [2022-07-19 21:21:12,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:21:12,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:12,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:12,989 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) [2022-07-19 21:21:12,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:21:13,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:21:13,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:21:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:13,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:21:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285908600] [2022-07-19 21:21:13,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:21:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257496351] [2022-07-19 21:21:13,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257496351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:13,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:13,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-19 21:21:13,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535363512] [2022-07-19 21:21:13,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:13,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:21:13,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:21:13,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:21:13,484 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 256 [2022-07-19 21:21:13,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 236 transitions, 531 flow. Second operand has 16 states, 16 states have (on average 227.25) internal successors, (3636), 16 states have internal predecessors, (3636), 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) [2022-07-19 21:21:13,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:13,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 256 [2022-07-19 21:21:13,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:13,712 INFO L129 PetriNetUnfolder]: 7/739 cut-off events. [2022-07-19 21:21:13,712 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-07-19 21:21:13,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 739 events. 7/739 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 521 event pairs, 0 based on Foata normal form. 8/737 useless extension candidates. Maximal degree in co-relation 930. Up to 22 conditions per place. [2022-07-19 21:21:13,716 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 19 selfloop transitions, 21 changer transitions 0/260 dead transitions. [2022-07-19 21:21:13,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 260 transitions, 719 flow [2022-07-19 21:21:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4769 transitions. [2022-07-19 21:21:13,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8870907738095238 [2022-07-19 21:21:13,724 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4769 transitions. [2022-07-19 21:21:13,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4769 transitions. [2022-07-19 21:21:13,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:13,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4769 transitions. [2022-07-19 21:21:13,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 227.0952380952381) internal successors, (4769), 21 states have internal predecessors, (4769), 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) [2022-07-19 21:21:13,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-19 21:21:13,744 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-19 21:21:13,744 INFO L186 Difference]: Start difference. First operand has 241 places, 236 transitions, 531 flow. Second operand 21 states and 4769 transitions. [2022-07-19 21:21:13,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 260 transitions, 719 flow [2022-07-19 21:21:13,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 260 transitions, 705 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:13,752 INFO L242 Difference]: Finished difference. Result has 265 places, 249 transitions, 655 flow [2022-07-19 21:21:13,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=655, PETRI_PLACES=265, PETRI_TRANSITIONS=249} [2022-07-19 21:21:13,754 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 37 predicate places. [2022-07-19 21:21:13,755 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 249 transitions, 655 flow [2022-07-19 21:21:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 227.25) internal successors, (3636), 16 states have internal predecessors, (3636), 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) [2022-07-19 21:21:13,756 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:13,756 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:13,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:13,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:13,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash -361462335, now seen corresponding path program 3 times [2022-07-19 21:21:13,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:13,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567703106] [2022-07-19 21:21:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:14,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:21:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137049462] [2022-07-19 21:21:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:21:14,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:14,012 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) [2022-07-19 21:21:14,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:21:14,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:21:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:21:14,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:21:14,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-19 21:21:14,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-07-19 21:21:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567703106] [2022-07-19 21:21:14,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:21:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137049462] [2022-07-19 21:21:14,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137049462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:14,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:14,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-19 21:21:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628732074] [2022-07-19 21:21:14,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:14,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:21:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:21:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:21:14,747 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 256 [2022-07-19 21:21:14,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 249 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 224.75) internal successors, (1798), 8 states have internal predecessors, (1798), 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) [2022-07-19 21:21:14,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:14,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 256 [2022-07-19 21:21:14,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:14,962 INFO L129 PetriNetUnfolder]: 8/1015 cut-off events. [2022-07-19 21:21:14,962 INFO L130 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-07-19 21:21:14,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 1015 events. 8/1015 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 209 event pairs, 0 based on Foata normal form. 2/1007 useless extension candidates. Maximal degree in co-relation 1337. Up to 33 conditions per place. [2022-07-19 21:21:14,965 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 20 selfloop transitions, 9 changer transitions 0/265 dead transitions. [2022-07-19 21:21:14,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 265 transitions, 747 flow [2022-07-19 21:21:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:21:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:21:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2029 transitions. [2022-07-19 21:21:14,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8806423611111112 [2022-07-19 21:21:14,968 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2029 transitions. [2022-07-19 21:21:14,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2029 transitions. [2022-07-19 21:21:14,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:14,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2029 transitions. [2022-07-19 21:21:14,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.44444444444446) internal successors, (2029), 9 states have internal predecessors, (2029), 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) [2022-07-19 21:21:14,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-19 21:21:14,976 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 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) [2022-07-19 21:21:14,976 INFO L186 Difference]: Start difference. First operand has 265 places, 249 transitions, 655 flow. Second operand 9 states and 2029 transitions. [2022-07-19 21:21:14,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 265 transitions, 747 flow [2022-07-19 21:21:14,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 265 transitions, 723 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-07-19 21:21:14,981 INFO L242 Difference]: Finished difference. Result has 270 places, 255 transitions, 681 flow [2022-07-19 21:21:14,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=270, PETRI_TRANSITIONS=255} [2022-07-19 21:21:14,982 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 42 predicate places. [2022-07-19 21:21:14,982 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 255 transitions, 681 flow [2022-07-19 21:21:14,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 224.75) internal successors, (1798), 8 states have internal predecessors, (1798), 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) [2022-07-19 21:21:14,983 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:14,984 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:15,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:21:15,199 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 [2022-07-19 21:21:15,202 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash -165335103, now seen corresponding path program 4 times [2022-07-19 21:21:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:15,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191260895] [2022-07-19 21:21:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:15,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:21:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448742474] [2022-07-19 21:21:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:21:15,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:15,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:15,281 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) [2022-07-19 21:21:15,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:21:15,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:21:15,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:21:15,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 3419 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:21:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:21:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-19 21:21:16,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:21:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-07-19 21:21:17,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:21:17,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191260895] [2022-07-19 21:21:17,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 21:21:17,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448742474] [2022-07-19 21:21:17,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448742474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:21:17,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:21:17,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-19 21:21:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507546824] [2022-07-19 21:21:17,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 21:21:17,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:21:17,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:21:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:21:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:21:17,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 256 [2022-07-19 21:21:17,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 255 transitions, 681 flow. Second operand has 16 states, 16 states have (on average 225.375) internal successors, (3606), 16 states have internal predecessors, (3606), 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) [2022-07-19 21:21:17,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:21:17,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 256 [2022-07-19 21:21:17,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:21:18,129 INFO L129 PetriNetUnfolder]: 12/2111 cut-off events. [2022-07-19 21:21:18,129 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2022-07-19 21:21:18,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 2111 events. 12/2111 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 213 event pairs, 0 based on Foata normal form. 4/2105 useless extension candidates. Maximal degree in co-relation 2809. Up to 70 conditions per place. [2022-07-19 21:21:18,134 INFO L132 encePairwiseOnDemand]: 250/256 looper letters, 40 selfloop transitions, 21 changer transitions 0/297 dead transitions. [2022-07-19 21:21:18,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 297 transitions, 947 flow [2022-07-19 21:21:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:21:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:21:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4727 transitions. [2022-07-19 21:21:18,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8792782738095238 [2022-07-19 21:21:18,142 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4727 transitions. [2022-07-19 21:21:18,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4727 transitions. [2022-07-19 21:21:18,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:21:18,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4727 transitions. [2022-07-19 21:21:18,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 225.0952380952381) internal successors, (4727), 21 states have internal predecessors, (4727), 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) [2022-07-19 21:21:18,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-19 21:21:18,171 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 256.0) internal successors, (5632), 22 states have internal predecessors, (5632), 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) [2022-07-19 21:21:18,171 INFO L186 Difference]: Start difference. First operand has 270 places, 255 transitions, 681 flow. Second operand 21 states and 4727 transitions. [2022-07-19 21:21:18,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 297 transitions, 947 flow [2022-07-19 21:21:18,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 297 transitions, 933 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:21:18,180 INFO L242 Difference]: Finished difference. Result has 294 places, 268 transitions, 805 flow [2022-07-19 21:21:18,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=805, PETRI_PLACES=294, PETRI_TRANSITIONS=268} [2022-07-19 21:21:18,181 INFO L279 CegarLoopForPetriNet]: 228 programPoint places, 66 predicate places. [2022-07-19 21:21:18,181 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 268 transitions, 805 flow [2022-07-19 21:21:18,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 225.375) internal successors, (3606), 16 states have internal predecessors, (3606), 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) [2022-07-19 21:21:18,182 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:21:18,183 INFO L200 CegarLoopForPetriNet]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:21:18,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 21:21:18,399 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 [2022-07-19 21:21:18,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:21:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:21:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 178717633, now seen corresponding path program 5 times [2022-07-19 21:21:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:21:18,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76701222] [2022-07-19 21:21:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:21:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:21:18,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 21:21:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696447019] [2022-07-19 21:21:18,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:21:18,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:21:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:21:18,566 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) [2022-07-19 21:21:18,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process