./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/07_rand.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/pthread-ext/07_rand.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 205a9486f54af3fadf53566888e578b0d398a9ea9e18a2466103c3619a5ade13 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:41:01,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:41:01,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:41:01,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:41:01,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:41:01,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:41:01,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:41:01,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:41:01,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:41:01,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:41:01,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:41:01,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:41:01,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:41:01,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:41:01,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:41:01,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:41:01,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:41:01,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:41:01,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:41:01,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:41:01,096 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:41:01,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:41:01,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:41:01,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:41:01,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:41:01,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:41:01,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:41:01,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:41:01,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:41:01,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:41:01,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:41:01,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:41:01,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:41:01,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:41:01,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:41:01,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:41:01,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:41:01,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:41:01,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:41:01,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:41:01,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:41:01,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:41:01,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:41:01,130 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:41:01,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:41:01,131 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:41:01,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:41:01,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:41:01,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:41:01,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:41:01,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:41:01,133 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:41:01,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:41:01,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:41:01,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:41:01,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:41:01,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:41:01,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:41:01,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:41:01,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:41:01,135 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:41:01,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:41:01,136 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:41:01,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:41:01,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:41:01,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:41:01,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:41:01,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:41:01,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:41:01,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:41:01,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:41:01,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:41:01,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:41:01,138 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:41:01,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:41:01,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:41:01,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 205a9486f54af3fadf53566888e578b0d398a9ea9e18a2466103c3619a5ade13 [2022-07-13 21:41:01,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:41:01,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:41:01,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:41:01,343 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:41:01,344 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:41:01,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/07_rand.i [2022-07-13 21:41:01,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a0c9307/ed8ff96d8f224c39b6bd43420199df65/FLAG136ad105f [2022-07-13 21:41:01,805 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:41:01,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/07_rand.i [2022-07-13 21:41:01,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a0c9307/ed8ff96d8f224c39b6bd43420199df65/FLAG136ad105f [2022-07-13 21:41:02,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a0c9307/ed8ff96d8f224c39b6bd43420199df65 [2022-07-13 21:41:02,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:41:02,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:41:02,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:41:02,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:41:02,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:41:02,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1466c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02, skipping insertion in model container [2022-07-13 21:41:02,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:41:02,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:41:02,519 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/pthread-ext/07_rand.i[30402,30415] [2022-07-13 21:41:02,524 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/pthread-ext/07_rand.i[30630,30643] [2022-07-13 21:41:02,527 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/pthread-ext/07_rand.i[30891,30904] [2022-07-13 21:41:02,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:41:02,541 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:41:02,586 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/pthread-ext/07_rand.i[30402,30415] [2022-07-13 21:41:02,587 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/pthread-ext/07_rand.i[30630,30643] [2022-07-13 21:41:02,588 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/pthread-ext/07_rand.i[30891,30904] [2022-07-13 21:41:02,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:41:02,621 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:41:02,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02 WrapperNode [2022-07-13 21:41:02,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:41:02,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:41:02,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:41:02,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:41:02,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,662 INFO L137 Inliner]: procedures = 174, calls = 21, calls flagged for inlining = 13, calls inlined = 16, statements flattened = 114 [2022-07-13 21:41:02,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:41:02,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:41:02,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:41:02,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:41:02,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:41:02,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:41:02,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:41:02,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:41:02,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (1/1) ... [2022-07-13 21:41:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:41:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:41:02,716 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) [2022-07-13 21:41:02,723 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 [2022-07-13 21:41:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-13 21:41:02,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-13 21:41:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:41:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:41:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:41:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:41:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:41:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:41:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:41:02,750 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:41:02,828 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:41:02,830 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:41:03,018 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:41:03,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:41:03,088 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 21:41:03,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:41:03 BoogieIcfgContainer [2022-07-13 21:41:03,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:41:03,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:41:03,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:41:03,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:41:03,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:41:02" (1/3) ... [2022-07-13 21:41:03,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3109861b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:41:03, skipping insertion in model container [2022-07-13 21:41:03,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:41:02" (2/3) ... [2022-07-13 21:41:03,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3109861b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:41:03, skipping insertion in model container [2022-07-13 21:41:03,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:41:03" (3/3) ... [2022-07-13 21:41:03,097 INFO L111 eAbstractionObserver]: Analyzing ICFG 07_rand.i [2022-07-13 21:41:03,101 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:41:03,109 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:41:03,109 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-13 21:41:03,109 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:41:03,153 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:41:03,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 93 places, 100 transitions, 205 flow [2022-07-13 21:41:03,231 INFO L129 PetriNetUnfolder]: 11/111 cut-off events. [2022-07-13 21:41:03,232 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:41:03,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 111 events. 11/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-07-13 21:41:03,236 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 100 transitions, 205 flow [2022-07-13 21:41:03,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 100 transitions, 205 flow [2022-07-13 21:41:03,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:41:03,253 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@3b444d93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fa3c374 [2022-07-13 21:41:03,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 21:41:03,268 INFO L129 PetriNetUnfolder]: 2/53 cut-off events. [2022-07-13 21:41:03,268 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:41:03,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:03,269 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] [2022-07-13 21:41:03,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-13 21:41:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 489543827, now seen corresponding path program 1 times [2022-07-13 21:41:03,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:03,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516832501] [2022-07-13 21:41:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:03,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:41:03,364 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:41:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:41:03,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:41:03,402 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:41:03,403 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-13 21:41:03,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-13 21:41:03,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-13 21:41:03,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-13 21:41:03,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-13 21:41:03,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-13 21:41:03,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-13 21:41:03,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:41:03,406 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:41:03,409 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:41:03,409 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:41:03,451 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:41:03,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 170 transitions, 352 flow [2022-07-13 21:41:03,504 INFO L129 PetriNetUnfolder]: 21/194 cut-off events. [2022-07-13 21:41:03,504 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:41:03,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 194 events. 21/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 495 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 151. Up to 6 conditions per place. [2022-07-13 21:41:03,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 170 transitions, 352 flow [2022-07-13 21:41:03,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 170 transitions, 352 flow [2022-07-13 21:41:03,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:41:03,514 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@3b444d93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fa3c374 [2022-07-13 21:41:03,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-13 21:41:03,530 INFO L129 PetriNetUnfolder]: 6/96 cut-off events. [2022-07-13 21:41:03,531 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 21:41:03,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:03,532 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:41:03,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-07-13 21:41:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1760386756, now seen corresponding path program 1 times [2022-07-13 21:41:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:03,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565387931] [2022-07-13 21:41:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:03,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:41:03,579 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:41:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:41:03,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:41:03,617 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:41:03,617 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-07-13 21:41:03,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2022-07-13 21:41:03,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2022-07-13 21:41:03,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2022-07-13 21:41:03,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2022-07-13 21:41:03,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2022-07-13 21:41:03,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2022-07-13 21:41:03,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2022-07-13 21:41:03,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2022-07-13 21:41:03,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2022-07-13 21:41:03,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:41:03,622 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 21:41:03,623 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:41:03,628 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:41:03,672 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:41:03,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 219 places, 240 transitions, 501 flow [2022-07-13 21:41:03,752 INFO L129 PetriNetUnfolder]: 31/277 cut-off events. [2022-07-13 21:41:03,752 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:41:03,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 277 events. 31/277 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 908 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 220. Up to 8 conditions per place. [2022-07-13 21:41:03,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 240 transitions, 501 flow [2022-07-13 21:41:03,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 240 transitions, 501 flow [2022-07-13 21:41:03,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:41:03,774 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@3b444d93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fa3c374 [2022-07-13 21:41:03,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-13 21:41:03,793 INFO L129 PetriNetUnfolder]: 7/115 cut-off events. [2022-07-13 21:41:03,793 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:41:03,793 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:03,793 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:41:03,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-07-13 21:41:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:03,798 INFO L85 PathProgramCache]: Analyzing trace with hash 41592902, now seen corresponding path program 1 times [2022-07-13 21:41:03,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:03,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957321780] [2022-07-13 21:41:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:03,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:41:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:41:03,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:41:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957321780] [2022-07-13 21:41:03,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957321780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:41:03,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:41:03,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:41:03,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133012011] [2022-07-13 21:41:03,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:41:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:41:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:41:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:41:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:41:03,984 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 240 [2022-07-13 21:41:03,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 240 transitions, 501 flow. Second operand has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 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) [2022-07-13 21:41:03,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:41:03,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 240 [2022-07-13 21:41:03,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:41:06,023 INFO L129 PetriNetUnfolder]: 4308/14876 cut-off events. [2022-07-13 21:41:06,023 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-13 21:41:06,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21512 conditions, 14876 events. 4308/14876 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 168387 event pairs, 1814 based on Foata normal form. 4581/17529 useless extension candidates. Maximal degree in co-relation 19131. Up to 2688 conditions per place. [2022-07-13 21:41:06,235 INFO L132 encePairwiseOnDemand]: 210/240 looper letters, 96 selfloop transitions, 7 changer transitions 0/269 dead transitions. [2022-07-13 21:41:06,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 269 transitions, 801 flow [2022-07-13 21:41:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:41:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:41:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1040 transitions. [2022-07-13 21:41:06,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8666666666666667 [2022-07-13 21:41:06,253 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1040 transitions. [2022-07-13 21:41:06,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1040 transitions. [2022-07-13 21:41:06,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:41:06,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1040 transitions. [2022-07-13 21:41:06,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 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) [2022-07-13 21:41:06,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2022-07-13 21:41:06,269 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2022-07-13 21:41:06,271 INFO L186 Difference]: Start difference. First operand has 219 places, 240 transitions, 501 flow. Second operand 5 states and 1040 transitions. [2022-07-13 21:41:06,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 269 transitions, 801 flow [2022-07-13 21:41:06,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 269 transitions, 789 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 21:41:06,280 INFO L242 Difference]: Finished difference. Result has 206 places, 207 transitions, 462 flow [2022-07-13 21:41:06,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=206, PETRI_TRANSITIONS=207} [2022-07-13 21:41:06,285 INFO L279 CegarLoopForPetriNet]: 219 programPoint places, -13 predicate places. [2022-07-13 21:41:06,285 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 207 transitions, 462 flow [2022-07-13 21:41:06,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 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) [2022-07-13 21:41:06,286 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:06,286 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:41:06,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:41:06,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2022-07-13 21:41:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1453052402, now seen corresponding path program 1 times [2022-07-13 21:41:06,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032083438] [2022-07-13 21:41:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:06,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:41:06,308 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:41:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:41:06,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:41:06,325 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:41:06,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-07-13 21:41:06,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2022-07-13 21:41:06,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2022-07-13 21:41:06,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2022-07-13 21:41:06,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2022-07-13 21:41:06,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2022-07-13 21:41:06,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2022-07-13 21:41:06,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2022-07-13 21:41:06,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2022-07-13 21:41:06,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2022-07-13 21:41:06,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2022-07-13 21:41:06,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2022-07-13 21:41:06,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2022-07-13 21:41:06,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:41:06,328 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:41:06,329 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:41:06,329 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:41:06,360 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-13 21:41:06,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 282 places, 310 transitions, 652 flow [2022-07-13 21:41:06,415 INFO L129 PetriNetUnfolder]: 41/360 cut-off events. [2022-07-13 21:41:06,415 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:41:06,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 360 events. 41/360 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1335 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-07-13 21:41:06,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 282 places, 310 transitions, 652 flow [2022-07-13 21:41:06,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 310 transitions, 652 flow [2022-07-13 21:41:06,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:41:06,428 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@3b444d93, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fa3c374 [2022-07-13 21:41:06,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-07-13 21:41:06,436 INFO L129 PetriNetUnfolder]: 6/109 cut-off events. [2022-07-13 21:41:06,437 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:41:06,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:06,437 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:41:06,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-07-13 21:41:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1163070273, now seen corresponding path program 1 times [2022-07-13 21:41:06,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:06,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339622388] [2022-07-13 21:41:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:41:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:41:06,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:41:06,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339622388] [2022-07-13 21:41:06,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339622388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:41:06,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:41:06,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:41:06,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012135065] [2022-07-13 21:41:06,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:41:06,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:41:06,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:41:06,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:41:06,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:41:06,501 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 310 [2022-07-13 21:41:06,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 310 transitions, 652 flow. Second operand has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 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) [2022-07-13 21:41:06,503 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:41:06,505 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 310 [2022-07-13 21:41:06,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:41:26,993 INFO L129 PetriNetUnfolder]: 74846/198683 cut-off events. [2022-07-13 21:41:26,994 INFO L130 PetriNetUnfolder]: For 18781/18781 co-relation queries the response was YES. [2022-07-13 21:41:28,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 302055 conditions, 198683 events. 74846/198683 cut-off events. For 18781/18781 co-relation queries the response was YES. Maximal size of possible extension queue 5217. Compared 2900971 event pairs, 30343 based on Foata normal form. 63849/234363 useless extension candidates. Maximal degree in co-relation 268160. Up to 40742 conditions per place. [2022-07-13 21:41:30,265 INFO L132 encePairwiseOnDemand]: 271/310 looper letters, 137 selfloop transitions, 9 changer transitions 0/361 dead transitions. [2022-07-13 21:41:30,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 361 transitions, 1109 flow [2022-07-13 21:41:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:41:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 21:41:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1358 transitions. [2022-07-13 21:41:30,270 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8761290322580645 [2022-07-13 21:41:30,270 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1358 transitions. [2022-07-13 21:41:30,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1358 transitions. [2022-07-13 21:41:30,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:41:30,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1358 transitions. [2022-07-13 21:41:30,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 271.6) internal successors, (1358), 5 states have internal predecessors, (1358), 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) [2022-07-13 21:41:30,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 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) [2022-07-13 21:41:30,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 310.0) internal successors, (1860), 6 states have internal predecessors, (1860), 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) [2022-07-13 21:41:30,278 INFO L186 Difference]: Start difference. First operand has 282 places, 310 transitions, 652 flow. Second operand 5 states and 1358 transitions. [2022-07-13 21:41:30,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 361 transitions, 1109 flow [2022-07-13 21:41:30,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 361 transitions, 1079 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-13 21:41:30,294 INFO L242 Difference]: Finished difference. Result has 265 places, 269 transitions, 603 flow [2022-07-13 21:41:30,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=603, PETRI_PLACES=265, PETRI_TRANSITIONS=269} [2022-07-13 21:41:30,296 INFO L279 CegarLoopForPetriNet]: 282 programPoint places, -17 predicate places. [2022-07-13 21:41:30,296 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 269 transitions, 603 flow [2022-07-13 21:41:30,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 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) [2022-07-13 21:41:30,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:41:30,297 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] [2022-07-13 21:41:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:41:30,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2022-07-13 21:41:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:41:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash 830577576, now seen corresponding path program 1 times [2022-07-13 21:41:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:41:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965606646] [2022-07-13 21:41:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:41:30,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:41:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:41:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:41:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:41:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965606646] [2022-07-13 21:41:30,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965606646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:41:30,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:41:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:41:30,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723611238] [2022-07-13 21:41:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:41:30,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:41:30,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:41:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:41:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:41:30,363 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 310 [2022-07-13 21:41:30,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 269 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 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) [2022-07-13 21:41:30,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:41:30,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 310 [2022-07-13 21:41:30,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand