./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_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_74-tricky_address1_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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:19:29,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:19:29,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:19:29,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:19:29,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:19:29,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:19:29,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:19:29,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:19:29,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:19:29,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:19:29,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:19:29,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:19:29,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:19:29,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:19:29,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:19:29,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:19:29,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:19:29,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:19:29,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:19:29,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:19:29,626 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:19:29,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:19:29,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:19:29,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:19:29,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:19:29,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:19:29,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:19:29,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:19:29,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:19:29,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:19:29,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:19:29,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:19:29,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:19:29,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:19:29,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:19:29,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:19:29,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:19:29,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:19:29,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:19:29,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:19:29,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:19:29,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:19:29,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:19:29,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:19:29,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:19:29,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:19:29,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:19:29,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:19:29,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:19:29,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:19:29,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:19:29,678 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:19:29,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:19:29,679 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:19:29,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:19:29,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:19:29,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:19:29,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:19:29,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:19:29,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:19:29,680 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:19:29,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:19:29,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:19:29,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:19:29,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:19:29,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:19:29,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:19:29,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:19:29,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:19:29,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:19:29,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:19:29,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:19:29,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:19:29,682 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:19:29,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:19:29,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:19:29,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2022-07-19 21:19:29,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:19:29,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:19:29,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:19:29,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:19:29,880 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:19:29,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-07-19 21:19:29,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3366d3427/cca29b63431b466e8866e8a83668739c/FLAGef21e8f6c [2022-07-19 21:19:30,295 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:19:30,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-07-19 21:19:30,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3366d3427/cca29b63431b466e8866e8a83668739c/FLAGef21e8f6c [2022-07-19 21:19:30,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3366d3427/cca29b63431b466e8866e8a83668739c [2022-07-19 21:19:30,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:19:30,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:19:30,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:19:30,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:19:30,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:19:30,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:19:30" (1/1) ... [2022-07-19 21:19:30,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12126e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:30, skipping insertion in model container [2022-07-19 21:19:30,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:19:30" (1/1) ... [2022-07-19 21:19:30,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:19:30,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:19:31,017 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_74-tricky_address1_racefree.i[41323,41336] [2022-07-19 21:19:31,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:19:31,048 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:19:31,070 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_74-tricky_address1_racefree.i[41323,41336] [2022-07-19 21:19:31,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:19:31,124 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:19:31,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31 WrapperNode [2022-07-19 21:19:31,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:19:31,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:19:31,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:19:31,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:19:31,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,189 INFO L137 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-07-19 21:19:31,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:19:31,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:19:31,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:19:31,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:19:31,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:19:31,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:19:31,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:19:31,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:19:31,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (1/1) ... [2022-07-19 21:19:31,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:19:31,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:31,279 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 21:19:31,281 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 21:19:31,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:19:31,314 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:19:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:19:31,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:19:31,315 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 21:19:31,436 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:19:31,438 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:19:31,641 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:19:31,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:19:31,655 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-19 21:19:31,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:19:31 BoogieIcfgContainer [2022-07-19 21:19:31,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:19:31,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:19:31,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:19:31,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:19:31,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:19:30" (1/3) ... [2022-07-19 21:19:31,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbdb2d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:19:31, skipping insertion in model container [2022-07-19 21:19:31,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:19:31" (2/3) ... [2022-07-19 21:19:31,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbdb2d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:19:31, skipping insertion in model container [2022-07-19 21:19:31,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:19:31" (3/3) ... [2022-07-19 21:19:31,673 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2022-07-19 21:19:31,677 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:19:31,683 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:19:31,684 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 21:19:31,684 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:19:31,739 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:19:31,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-07-19 21:19:31,822 INFO L129 PetriNetUnfolder]: 45/269 cut-off events. [2022-07-19 21:19:31,822 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-19 21:19:31,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 860 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-07-19 21:19:31,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-07-19 21:19:31,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-07-19 21:19:31,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:31,848 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@9638293, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b96b5ec [2022-07-19 21:19:31,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:19:31,889 INFO L129 PetriNetUnfolder]: 12/127 cut-off events. [2022-07-19 21:19:31,889 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:31,889 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:31,890 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] [2022-07-19 21:19:31,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1893756395, now seen corresponding path program 1 times [2022-07-19 21:19:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:31,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332859138] [2022-07-19 21:19:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,049 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 21:19:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:32,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332859138] [2022-07-19 21:19:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332859138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:32,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:32,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:32,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870041898] [2022-07-19 21:19:32,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:32,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:32,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:32,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 197 [2022-07-19 21:19:32,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 192 transitions, 389 flow. Second operand has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 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 21:19:32,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:32,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 197 [2022-07-19 21:19:32,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:32,124 INFO L129 PetriNetUnfolder]: 4/221 cut-off events. [2022-07-19 21:19:32,124 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:19:32,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 221 events. 4/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 636 event pairs, 0 based on Foata normal form. 40/248 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2022-07-19 21:19:32,129 INFO L132 encePairwiseOnDemand]: 170/197 looper letters, 1 selfloop transitions, 0 changer transitions 1/163 dead transitions. [2022-07-19 21:19:32,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 163 transitions, 333 flow [2022-07-19 21:19:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 360 transitions. [2022-07-19 21:19:32,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9137055837563451 [2022-07-19 21:19:32,150 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 360 transitions. [2022-07-19 21:19:32,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 360 transitions. [2022-07-19 21:19:32,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:32,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 360 transitions. [2022-07-19 21:19:32,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 180.0) internal successors, (360), 2 states have internal predecessors, (360), 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 21:19:32,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 21:19:32,162 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 21:19:32,163 INFO L186 Difference]: Start difference. First operand has 165 places, 192 transitions, 389 flow. Second operand 2 states and 360 transitions. [2022-07-19 21:19:32,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 163 transitions, 333 flow [2022-07-19 21:19:32,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 163 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:32,169 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 329 flow [2022-07-19 21:19:32,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=329, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2022-07-19 21:19:32,172 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, -1 predicate places. [2022-07-19 21:19:32,173 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 329 flow [2022-07-19 21:19:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 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 21:19:32,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:32,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:19:32,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1763164273, now seen corresponding path program 1 times [2022-07-19 21:19:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:32,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428134941] [2022-07-19 21:19:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428134941] [2022-07-19 21:19:32,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428134941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:32,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:32,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905870607] [2022-07-19 21:19:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:32,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:32,262 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-07-19 21:19:32,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 21:19:32,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:32,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-07-19 21:19:32,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:32,321 INFO L129 PetriNetUnfolder]: 4/224 cut-off events. [2022-07-19 21:19:32,321 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:19:32,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 224 events. 4/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 633 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 239. Up to 9 conditions per place. [2022-07-19 21:19:32,333 INFO L132 encePairwiseOnDemand]: 194/197 looper letters, 10 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-07-19 21:19:32,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 166 transitions, 361 flow [2022-07-19 21:19:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-07-19 21:19:32,338 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291032148900169 [2022-07-19 21:19:32,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-07-19 21:19:32,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-07-19 21:19:32,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:32,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-07-19 21:19:32,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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 21:19:32,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 21:19:32,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 21:19:32,344 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 329 flow. Second operand 3 states and 490 transitions. [2022-07-19 21:19:32,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 166 transitions, 361 flow [2022-07-19 21:19:32,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 361 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:32,351 INFO L242 Difference]: Finished difference. Result has 166 places, 163 transitions, 341 flow [2022-07-19 21:19:32,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-07-19 21:19:32,351 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 1 predicate places. [2022-07-19 21:19:32,352 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 341 flow [2022-07-19 21:19:32,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 21:19:32,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:32,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:32,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:19:32,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2008438335, now seen corresponding path program 1 times [2022-07-19 21:19:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:32,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753768444] [2022-07-19 21:19:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:32,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:32,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:32,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753768444] [2022-07-19 21:19:32,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753768444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:32,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766162327] [2022-07-19 21:19:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:32,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:32,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:32,434 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 21:19:32,448 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 21:19:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 21:19:32,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:32,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:19:32,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766162327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:32,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:19:32,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-19 21:19:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504952144] [2022-07-19 21:19:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:32,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:19:32,562 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-07-19 21:19:32,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 21:19:32,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:32,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-07-19 21:19:32,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:32,586 INFO L129 PetriNetUnfolder]: 3/170 cut-off events. [2022-07-19 21:19:32,588 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:19:32,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 170 events. 3/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 323 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 188. Up to 6 conditions per place. [2022-07-19 21:19:32,591 INFO L132 encePairwiseOnDemand]: 194/197 looper letters, 8 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2022-07-19 21:19:32,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 365 flow [2022-07-19 21:19:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:32,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-07-19 21:19:32,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8257191201353637 [2022-07-19 21:19:32,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-07-19 21:19:32,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-07-19 21:19:32,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:32,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-07-19 21:19:32,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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 21:19:32,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 21:19:32,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 21:19:32,596 INFO L186 Difference]: Start difference. First operand has 166 places, 163 transitions, 341 flow. Second operand 3 states and 488 transitions. [2022-07-19 21:19:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 365 flow [2022-07-19 21:19:32,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:32,601 INFO L242 Difference]: Finished difference. Result has 168 places, 163 transitions, 347 flow [2022-07-19 21:19:32,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2022-07-19 21:19:32,602 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-07-19 21:19:32,603 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 347 flow [2022-07-19 21:19:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 21:19:32,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:32,603 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] [2022-07-19 21:19:32,637 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 21:19:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:32,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:32,820 INFO L85 PathProgramCache]: Analyzing trace with hash -408777690, now seen corresponding path program 1 times [2022-07-19 21:19:32,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:32,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608413449] [2022-07-19 21:19:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:32,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608413449] [2022-07-19 21:19:32,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608413449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:32,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535853316] [2022-07-19 21:19:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:32,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:32,899 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 21:19:32,900 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 21:19:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:32,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:32,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:33,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:33,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535853316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:33,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:33,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509475241] [2022-07-19 21:19:33,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:33,073 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-19 21:19:33,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 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 21:19:33,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:33,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-19 21:19:33,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:33,141 INFO L129 PetriNetUnfolder]: 3/177 cut-off events. [2022-07-19 21:19:33,142 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:19:33,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 177 events. 3/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 209. Up to 6 conditions per place. [2022-07-19 21:19:33,143 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 11 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-07-19 21:19:33,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 173 transitions, 409 flow [2022-07-19 21:19:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2022-07-19 21:19:33,146 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.81443880428652 [2022-07-19 21:19:33,146 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2022-07-19 21:19:33,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2022-07-19 21:19:33,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:33,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2022-07-19 21:19:33,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 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 21:19:33,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 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 21:19:33,152 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 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 21:19:33,152 INFO L186 Difference]: Start difference. First operand has 168 places, 163 transitions, 347 flow. Second operand 9 states and 1444 transitions. [2022-07-19 21:19:33,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 173 transitions, 409 flow [2022-07-19 21:19:33,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:19:33,154 INFO L242 Difference]: Finished difference. Result has 177 places, 169 transitions, 393 flow [2022-07-19 21:19:33,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=177, PETRI_TRANSITIONS=169} [2022-07-19 21:19:33,155 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 12 predicate places. [2022-07-19 21:19:33,155 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 169 transitions, 393 flow [2022-07-19 21:19:33,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 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 21:19:33,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:33,156 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:19:33,175 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 21:19:33,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 21:19:33,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 81295910, now seen corresponding path program 2 times [2022-07-19 21:19:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338934066] [2022-07-19 21:19:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338934066] [2022-07-19 21:19:33,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338934066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145803939] [2022-07-19 21:19:33,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:19:33,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:33,458 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 21:19:33,459 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 21:19:33,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:19:33,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:19:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:33,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:33,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145803939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:33,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:33,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586243061] [2022-07-19 21:19:33,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:33,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:33,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:33,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-19 21:19:33,685 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 169 transitions, 393 flow. Second operand has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 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 21:19:33,685 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:33,685 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-19 21:19:33,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:33,826 INFO L129 PetriNetUnfolder]: 3/197 cut-off events. [2022-07-19 21:19:33,827 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-19 21:19:33,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 197 events. 3/197 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 295. Up to 11 conditions per place. [2022-07-19 21:19:33,828 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 19 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2022-07-19 21:19:33,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 193 transitions, 581 flow [2022-07-19 21:19:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3362 transitions. [2022-07-19 21:19:33,834 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8126661832245589 [2022-07-19 21:19:33,835 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3362 transitions. [2022-07-19 21:19:33,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3362 transitions. [2022-07-19 21:19:33,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:33,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3362 transitions. [2022-07-19 21:19:33,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.0952380952381) internal successors, (3362), 21 states have internal predecessors, (3362), 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 21:19:33,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 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 21:19:33,847 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 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 21:19:33,847 INFO L186 Difference]: Start difference. First operand has 177 places, 169 transitions, 393 flow. Second operand 21 states and 3362 transitions. [2022-07-19 21:19:33,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 193 transitions, 581 flow [2022-07-19 21:19:33,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 567 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:33,851 INFO L242 Difference]: Finished difference. Result has 201 places, 182 transitions, 517 flow [2022-07-19 21:19:33,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=517, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2022-07-19 21:19:33,852 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 36 predicate places. [2022-07-19 21:19:33,852 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 517 flow [2022-07-19 21:19:33,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 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 21:19:33,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:33,854 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:19:33,872 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 21:19:34,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:34,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash 653252134, now seen corresponding path program 3 times [2022-07-19 21:19:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:34,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049062185] [2022-07-19 21:19:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:34,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:34,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049062185] [2022-07-19 21:19:34,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049062185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099817030] [2022-07-19 21:19:34,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:19:34,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:34,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:34,231 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 21:19:34,232 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 21:19:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 21:19:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:19:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:34,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:34,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:19:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099817030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:34,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:34,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-19 21:19:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223883634] [2022-07-19 21:19:34,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:34,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:19:34,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:34,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:19:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:19:34,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-07-19 21:19:34,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 517 flow. Second operand has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 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 21:19:34,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:34,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-07-19 21:19:34,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:34,724 INFO L129 PetriNetUnfolder]: 3/212 cut-off events. [2022-07-19 21:19:34,724 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 21:19:34,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 212 events. 3/212 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 318 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 391. Up to 17 conditions per place. [2022-07-19 21:19:34,726 INFO L132 encePairwiseOnDemand]: 191/197 looper letters, 25 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2022-07-19 21:19:34,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 208 transitions, 773 flow [2022-07-19 21:19:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:19:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:19:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4798 transitions. [2022-07-19 21:19:34,733 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.811844331641286 [2022-07-19 21:19:34,733 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4798 transitions. [2022-07-19 21:19:34,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4798 transitions. [2022-07-19 21:19:34,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:34,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4798 transitions. [2022-07-19 21:19:34,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 159.93333333333334) internal successors, (4798), 30 states have internal predecessors, (4798), 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 21:19:34,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 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 21:19:34,763 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 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 21:19:34,764 INFO L186 Difference]: Start difference. First operand has 201 places, 182 transitions, 517 flow. Second operand 30 states and 4798 transitions. [2022-07-19 21:19:34,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 208 transitions, 773 flow [2022-07-19 21:19:34,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 208 transitions, 743 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:34,769 INFO L242 Difference]: Finished difference. Result has 228 places, 192 transitions, 645 flow [2022-07-19 21:19:34,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=645, PETRI_PLACES=228, PETRI_TRANSITIONS=192} [2022-07-19 21:19:34,769 INFO L279 CegarLoopForPetriNet]: 165 programPoint places, 63 predicate places. [2022-07-19 21:19:34,770 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 192 transitions, 645 flow [2022-07-19 21:19:34,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 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 21:19:34,771 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:34,771 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2022-07-19 21:19:34,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:34,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:19:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2059256618, now seen corresponding path program 4 times [2022-07-19 21:19:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:34,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770595605] [2022-07-19 21:19:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:35,010 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:35,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:35,058 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:35,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:19:35,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:19:35,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:19:35,060 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:19:35,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:19:35,061 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-19 21:19:35,062 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:35,062 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:19:35,090 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:19:35,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-07-19 21:19:35,120 INFO L129 PetriNetUnfolder]: 75/438 cut-off events. [2022-07-19 21:19:35,120 INFO L130 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-07-19 21:19:35,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1746 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-07-19 21:19:35,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-07-19 21:19:35,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-07-19 21:19:35,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:35,129 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@9638293, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b96b5ec [2022-07-19 21:19:35,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:19:35,134 INFO L129 PetriNetUnfolder]: 13/134 cut-off events. [2022-07-19 21:19:35,134 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:19:35,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:35,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:35,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -280318449, now seen corresponding path program 1 times [2022-07-19 21:19:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:35,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177543682] [2022-07-19 21:19:35,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:35,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177543682] [2022-07-19 21:19:35,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177543682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:35,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:35,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:35,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993368335] [2022-07-19 21:19:35,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:35,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:35,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:35,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:35,149 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 269 [2022-07-19 21:19:35,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 556 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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 21:19:35,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:35,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 269 [2022-07-19 21:19:35,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:35,193 INFO L129 PetriNetUnfolder]: 9/367 cut-off events. [2022-07-19 21:19:35,193 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-19 21:19:35,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 367 events. 9/367 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1431 event pairs, 0 based on Foata normal form. 91/437 useless extension candidates. Maximal degree in co-relation 230. Up to 7 conditions per place. [2022-07-19 21:19:35,196 INFO L132 encePairwiseOnDemand]: 230/269 looper letters, 4 selfloop transitions, 0 changer transitions 1/227 dead transitions. [2022-07-19 21:19:35,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 480 flow [2022-07-19 21:19:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 489 transitions. [2022-07-19 21:19:35,198 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9089219330855018 [2022-07-19 21:19:35,198 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 489 transitions. [2022-07-19 21:19:35,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 489 transitions. [2022-07-19 21:19:35,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:35,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 489 transitions. [2022-07-19 21:19:35,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 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 21:19:35,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 21:19:35,200 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 21:19:35,200 INFO L186 Difference]: Start difference. First operand has 229 places, 269 transitions, 556 flow. Second operand 2 states and 489 transitions. [2022-07-19 21:19:35,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 480 flow [2022-07-19 21:19:35,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 227 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:35,203 INFO L242 Difference]: Finished difference. Result has 227 places, 226 transitions, 470 flow [2022-07-19 21:19:35,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=470, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-07-19 21:19:35,204 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, -2 predicate places. [2022-07-19 21:19:35,204 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 470 flow [2022-07-19 21:19:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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 21:19:35,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:35,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:35,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:19:35,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:35,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2106119919, now seen corresponding path program 1 times [2022-07-19 21:19:35,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:35,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101244857] [2022-07-19 21:19:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:35,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101244857] [2022-07-19 21:19:35,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101244857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:35,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:35,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666286922] [2022-07-19 21:19:35,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:35,229 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-07-19 21:19:35,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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 21:19:35,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:35,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-07-19 21:19:35,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:35,269 INFO L129 PetriNetUnfolder]: 9/370 cut-off events. [2022-07-19 21:19:35,269 INFO L130 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-07-19 21:19:35,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 370 events. 9/370 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1428 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 398. Up to 14 conditions per place. [2022-07-19 21:19:35,273 INFO L132 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-07-19 21:19:35,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 508 flow [2022-07-19 21:19:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-07-19 21:19:35,274 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-07-19 21:19:35,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-07-19 21:19:35,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-07-19 21:19:35,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:35,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-07-19 21:19:35,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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 21:19:35,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 21:19:35,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 21:19:35,287 INFO L186 Difference]: Start difference. First operand has 227 places, 226 transitions, 470 flow. Second operand 3 states and 664 transitions. [2022-07-19 21:19:35,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 508 flow [2022-07-19 21:19:35,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:35,291 INFO L242 Difference]: Finished difference. Result has 229 places, 227 transitions, 482 flow [2022-07-19 21:19:35,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2022-07-19 21:19:35,293 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 0 predicate places. [2022-07-19 21:19:35,293 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 482 flow [2022-07-19 21:19:35,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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 21:19:35,294 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:35,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:35,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:19:35,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash 178238190, now seen corresponding path program 1 times [2022-07-19 21:19:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:35,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107823173] [2022-07-19 21:19:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107823173] [2022-07-19 21:19:35,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107823173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:35,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943367253] [2022-07-19 21:19:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:35,336 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 21:19:35,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:19:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 21:19:35,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:35,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:19:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943367253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:35,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:19:35,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-19 21:19:35,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273985921] [2022-07-19 21:19:35,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:35,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:19:35,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-07-19 21:19:35,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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 21:19:35,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:35,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-07-19 21:19:35,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:35,476 INFO L129 PetriNetUnfolder]: 7/325 cut-off events. [2022-07-19 21:19:35,477 INFO L130 PetriNetUnfolder]: For 15/34 co-relation queries the response was YES. [2022-07-19 21:19:35,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 325 events. 7/325 cut-off events. For 15/34 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1109 event pairs, 0 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2022-07-19 21:19:35,481 INFO L132 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/231 dead transitions. [2022-07-19 21:19:35,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 231 transitions, 520 flow [2022-07-19 21:19:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-07-19 21:19:35,483 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-07-19 21:19:35,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-07-19 21:19:35,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-07-19 21:19:35,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:35,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-07-19 21:19:35,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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 21:19:35,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 21:19:35,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 21:19:35,487 INFO L186 Difference]: Start difference. First operand has 229 places, 227 transitions, 482 flow. Second operand 3 states and 664 transitions. [2022-07-19 21:19:35,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 231 transitions, 520 flow [2022-07-19 21:19:35,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 231 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:35,491 INFO L242 Difference]: Finished difference. Result has 231 places, 228 transitions, 492 flow [2022-07-19 21:19:35,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=231, PETRI_TRANSITIONS=228} [2022-07-19 21:19:35,492 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 2 predicate places. [2022-07-19 21:19:35,492 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 228 transitions, 492 flow [2022-07-19 21:19:35,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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 21:19:35,492 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:35,493 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 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] [2022-07-19 21:19:35,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 21:19:35,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1515379677, now seen corresponding path program 1 times [2022-07-19 21:19:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431656927] [2022-07-19 21:19:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:35,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431656927] [2022-07-19 21:19:35,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431656927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475097017] [2022-07-19 21:19:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:35,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:35,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:35,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:19:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:35,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:35,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:35,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475097017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:35,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:35,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233183333] [2022-07-19 21:19:35,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:35,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-19 21:19:35,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 228 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 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 21:19:35,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:35,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-19 21:19:35,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:35,925 INFO L129 PetriNetUnfolder]: 7/332 cut-off events. [2022-07-19 21:19:35,925 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-19 21:19:35,927 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 332 events. 7/332 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 379. Up to 11 conditions per place. [2022-07-19 21:19:35,928 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 14 selfloop transitions, 9 changer transitions 0/238 dead transitions. [2022-07-19 21:19:35,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 238 transitions, 560 flow [2022-07-19 21:19:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1960 transitions. [2022-07-19 21:19:35,943 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8095828170177612 [2022-07-19 21:19:35,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1960 transitions. [2022-07-19 21:19:35,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1960 transitions. [2022-07-19 21:19:35,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:35,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1960 transitions. [2022-07-19 21:19:35,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.77777777777777) internal successors, (1960), 9 states have internal predecessors, (1960), 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 21:19:35,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 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 21:19:35,950 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 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 21:19:35,950 INFO L186 Difference]: Start difference. First operand has 231 places, 228 transitions, 492 flow. Second operand 9 states and 1960 transitions. [2022-07-19 21:19:35,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 238 transitions, 560 flow [2022-07-19 21:19:35,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 238 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:35,954 INFO L242 Difference]: Finished difference. Result has 241 places, 234 transitions, 540 flow [2022-07-19 21:19:35,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=241, PETRI_TRANSITIONS=234} [2022-07-19 21:19:35,956 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 12 predicate places. [2022-07-19 21:19:35,956 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 234 transitions, 540 flow [2022-07-19 21:19:35,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 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 21:19:35,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:35,957 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2022-07-19 21:19:35,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:36,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:36,172 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -412502595, now seen corresponding path program 2 times [2022-07-19 21:19:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255333482] [2022-07-19 21:19:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255333482] [2022-07-19 21:19:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255333482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501353047] [2022-07-19 21:19:36,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:19:36,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:36,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:36,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:19:36,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:19:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:19:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:36,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:36,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501353047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:36,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:36,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596350642] [2022-07-19 21:19:36,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:36,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:36,416 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-19 21:19:36,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 234 transitions, 540 flow. Second operand has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 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 21:19:36,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:36,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-19 21:19:36,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:36,594 INFO L129 PetriNetUnfolder]: 7/352 cut-off events. [2022-07-19 21:19:36,595 INFO L130 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2022-07-19 21:19:36,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 352 events. 7/352 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 4/342 useless extension candidates. Maximal degree in co-relation 466. Up to 11 conditions per place. [2022-07-19 21:19:36,597 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 22 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-07-19 21:19:36,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 258 transitions, 734 flow [2022-07-19 21:19:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 21:19:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-19 21:19:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4562 transitions. [2022-07-19 21:19:36,606 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8075765622234023 [2022-07-19 21:19:36,606 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4562 transitions. [2022-07-19 21:19:36,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4562 transitions. [2022-07-19 21:19:36,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:36,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4562 transitions. [2022-07-19 21:19:36,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 217.23809523809524) internal successors, (4562), 21 states have internal predecessors, (4562), 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 21:19:36,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 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 21:19:36,621 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 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 21:19:36,621 INFO L186 Difference]: Start difference. First operand has 241 places, 234 transitions, 540 flow. Second operand 21 states and 4562 transitions. [2022-07-19 21:19:36,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 258 transitions, 734 flow [2022-07-19 21:19:36,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 258 transitions, 720 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:36,625 INFO L242 Difference]: Finished difference. Result has 265 places, 247 transitions, 664 flow [2022-07-19 21:19:36,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=664, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-07-19 21:19:36,626 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 36 predicate places. [2022-07-19 21:19:36,626 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 664 flow [2022-07-19 21:19:36,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 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 21:19:36,627 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:36,627 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 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] [2022-07-19 21:19:36,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:36,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:36,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:36,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:36,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2002198147, now seen corresponding path program 3 times [2022-07-19 21:19:36,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:36,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604270147] [2022-07-19 21:19:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:36,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:36,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604270147] [2022-07-19 21:19:36,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604270147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:36,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456337818] [2022-07-19 21:19:36,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:19:36,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:36,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:36,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:19:37,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 21:19:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:19:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:37,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:19:37,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456337818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:37,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-19 21:19:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415012339] [2022-07-19 21:19:37,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:37,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:19:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:19:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:19:37,222 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-07-19 21:19:37,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 664 flow. Second operand has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 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 21:19:37,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:37,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-07-19 21:19:37,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:37,474 INFO L129 PetriNetUnfolder]: 7/367 cut-off events. [2022-07-19 21:19:37,474 INFO L130 PetriNetUnfolder]: For 127/131 co-relation queries the response was YES. [2022-07-19 21:19:37,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 367 events. 7/367 cut-off events. For 127/131 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1104 event pairs, 0 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 562. Up to 17 conditions per place. [2022-07-19 21:19:37,477 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 28 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2022-07-19 21:19:37,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 273 transitions, 926 flow [2022-07-19 21:19:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:19:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:19:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6511 transitions. [2022-07-19 21:19:37,482 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8068153655514251 [2022-07-19 21:19:37,482 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6511 transitions. [2022-07-19 21:19:37,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6511 transitions. [2022-07-19 21:19:37,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:37,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6511 transitions. [2022-07-19 21:19:37,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 217.03333333333333) internal successors, (6511), 30 states have internal predecessors, (6511), 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 21:19:37,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 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 21:19:37,497 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 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 21:19:37,497 INFO L186 Difference]: Start difference. First operand has 265 places, 247 transitions, 664 flow. Second operand 30 states and 6511 transitions. [2022-07-19 21:19:37,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 273 transitions, 926 flow [2022-07-19 21:19:37,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 273 transitions, 896 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:37,502 INFO L242 Difference]: Finished difference. Result has 292 places, 257 transitions, 792 flow [2022-07-19 21:19:37,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=792, PETRI_PLACES=292, PETRI_TRANSITIONS=257} [2022-07-19 21:19:37,503 INFO L279 CegarLoopForPetriNet]: 229 programPoint places, 63 predicate places. [2022-07-19 21:19:37,503 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 257 transitions, 792 flow [2022-07-19 21:19:37,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 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 21:19:37,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:37,504 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 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] [2022-07-19 21:19:37,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:37,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:19:37,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:19:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1312549664, now seen corresponding path program 4 times [2022-07-19 21:19:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:37,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394435860] [2022-07-19 21:19:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:37,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:37,732 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:37,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:37,752 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:37,752 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:19:37,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:19:37,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:19:37,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:19:37,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:19:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:19:37,753 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-19 21:19:37,753 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:37,753 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:19:37,772 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:19:37,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-07-19 21:19:37,831 INFO L129 PetriNetUnfolder]: 110/640 cut-off events. [2022-07-19 21:19:37,831 INFO L130 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-07-19 21:19:37,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2841 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-07-19 21:19:37,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-07-19 21:19:37,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-07-19 21:19:37,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:37,844 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@9638293, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b96b5ec [2022-07-19 21:19:37,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:19:37,849 INFO L129 PetriNetUnfolder]: 15/139 cut-off events. [2022-07-19 21:19:37,849 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:19:37,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:37,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:37,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash 936600048, now seen corresponding path program 1 times [2022-07-19 21:19:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:37,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819472987] [2022-07-19 21:19:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:37,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819472987] [2022-07-19 21:19:37,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819472987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:37,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:37,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:19:37,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589436595] [2022-07-19 21:19:37,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:37,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:19:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:37,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:19:37,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:19:37,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 341 [2022-07-19 21:19:37,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 341 transitions, 712 flow. Second operand has 2 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 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 21:19:37,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:37,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 341 [2022-07-19 21:19:37,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:37,916 INFO L129 PetriNetUnfolder]: 16/539 cut-off events. [2022-07-19 21:19:37,916 INFO L130 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-07-19 21:19:37,922 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 539 events. 16/539 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2476 event pairs, 1 based on Foata normal form. 209/717 useless extension candidates. Maximal degree in co-relation 381. Up to 16 conditions per place. [2022-07-19 21:19:37,924 INFO L132 encePairwiseOnDemand]: 290/341 looper letters, 6 selfloop transitions, 0 changer transitions 1/286 dead transitions. [2022-07-19 21:19:37,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 286 transitions, 614 flow [2022-07-19 21:19:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:19:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:19:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-07-19 21:19:37,925 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9046920821114369 [2022-07-19 21:19:37,925 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-07-19 21:19:37,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-07-19 21:19:37,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:37,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-07-19 21:19:37,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 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 21:19:37,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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 21:19:37,927 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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 21:19:37,927 INFO L186 Difference]: Start difference. First operand has 289 places, 341 transitions, 712 flow. Second operand 2 states and 617 transitions. [2022-07-19 21:19:37,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 286 transitions, 614 flow [2022-07-19 21:19:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 286 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:37,930 INFO L242 Difference]: Finished difference. Result has 286 places, 285 transitions, 600 flow [2022-07-19 21:19:37,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=600, PETRI_PLACES=286, PETRI_TRANSITIONS=285} [2022-07-19 21:19:37,931 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, -3 predicate places. [2022-07-19 21:19:37,931 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 285 transitions, 600 flow [2022-07-19 21:19:37,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 280.5) internal successors, (561), 2 states have internal predecessors, (561), 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 21:19:37,932 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:37,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:19:37,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1898214065, now seen corresponding path program 1 times [2022-07-19 21:19:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:37,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065302452] [2022-07-19 21:19:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:37,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:37,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065302452] [2022-07-19 21:19:37,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065302452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:37,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:37,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811548225] [2022-07-19 21:19:37,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:37,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:37,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-07-19 21:19:37,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 285 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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 21:19:37,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:37,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-07-19 21:19:37,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:38,029 INFO L129 PetriNetUnfolder]: 16/542 cut-off events. [2022-07-19 21:19:38,029 INFO L130 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-07-19 21:19:38,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 542 events. 16/542 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2473 event pairs, 1 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 592. Up to 23 conditions per place. [2022-07-19 21:19:38,037 INFO L132 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-07-19 21:19:38,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 289 transitions, 642 flow [2022-07-19 21:19:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-07-19 21:19:38,052 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-19 21:19:38,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-07-19 21:19:38,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-07-19 21:19:38,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:38,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-07-19 21:19:38,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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 21:19:38,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 21:19:38,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 21:19:38,054 INFO L186 Difference]: Start difference. First operand has 286 places, 285 transitions, 600 flow. Second operand 3 states and 837 transitions. [2022-07-19 21:19:38,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 289 transitions, 642 flow [2022-07-19 21:19:38,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 289 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:38,058 INFO L242 Difference]: Finished difference. Result has 288 places, 286 transitions, 612 flow [2022-07-19 21:19:38,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=612, PETRI_PLACES=288, PETRI_TRANSITIONS=286} [2022-07-19 21:19:38,059 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, -1 predicate places. [2022-07-19 21:19:38,059 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 286 transitions, 612 flow [2022-07-19 21:19:38,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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 21:19:38,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:38,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:38,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:19:38,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash -163255965, now seen corresponding path program 1 times [2022-07-19 21:19:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:38,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121869656] [2022-07-19 21:19:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:38,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:38,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121869656] [2022-07-19 21:19:38,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121869656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:38,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371375694] [2022-07-19 21:19:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:38,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:19:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 21:19:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:38,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:19:38,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371375694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:38,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:19:38,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-19 21:19:38,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090704518] [2022-07-19 21:19:38,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:38,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:38,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:19:38,185 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-07-19 21:19:38,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 286 transitions, 612 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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 21:19:38,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:38,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-07-19 21:19:38,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:38,256 INFO L129 PetriNetUnfolder]: 14/497 cut-off events. [2022-07-19 21:19:38,256 INFO L130 PetriNetUnfolder]: For 62/152 co-relation queries the response was YES. [2022-07-19 21:19:38,262 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 497 events. 14/497 cut-off events. For 62/152 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2138 event pairs, 1 based on Foata normal form. 1/472 useless extension candidates. Maximal degree in co-relation 560. Up to 30 conditions per place. [2022-07-19 21:19:38,264 INFO L132 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-07-19 21:19:38,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 290 transitions, 654 flow [2022-07-19 21:19:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-07-19 21:19:38,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-19 21:19:38,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-07-19 21:19:38,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-07-19 21:19:38,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:38,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-07-19 21:19:38,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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 21:19:38,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 21:19:38,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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 21:19:38,269 INFO L186 Difference]: Start difference. First operand has 288 places, 286 transitions, 612 flow. Second operand 3 states and 837 transitions. [2022-07-19 21:19:38,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 290 transitions, 654 flow [2022-07-19 21:19:38,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 290 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:38,273 INFO L242 Difference]: Finished difference. Result has 290 places, 287 transitions, 622 flow [2022-07-19 21:19:38,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=290, PETRI_TRANSITIONS=287} [2022-07-19 21:19:38,274 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2022-07-19 21:19:38,274 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 287 transitions, 622 flow [2022-07-19 21:19:38,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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 21:19:38,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:38,275 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, 1, 1, 1, 1, 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 21:19:38,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:38,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:19:38,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash -522046394, now seen corresponding path program 1 times [2022-07-19 21:19:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611729999] [2022-07-19 21:19:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:38,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611729999] [2022-07-19 21:19:38,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611729999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:38,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406265987] [2022-07-19 21:19:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:38,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:38,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:38,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:19:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:38,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:38,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:38,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406265987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:38,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:38,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:38,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097606946] [2022-07-19 21:19:38,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:38,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:38,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:38,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:38,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:38,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-07-19 21:19:38,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 287 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 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 21:19:38,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:38,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-07-19 21:19:38,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:38,750 INFO L129 PetriNetUnfolder]: 14/504 cut-off events. [2022-07-19 21:19:38,751 INFO L130 PetriNetUnfolder]: For 54/69 co-relation queries the response was YES. [2022-07-19 21:19:38,754 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 504 events. 14/504 cut-off events. For 54/69 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2133 event pairs, 1 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 575. Up to 20 conditions per place. [2022-07-19 21:19:38,756 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 16 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-07-19 21:19:38,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 297 transitions, 694 flow [2022-07-19 21:19:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2475 transitions. [2022-07-19 21:19:38,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-07-19 21:19:38,759 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2475 transitions. [2022-07-19 21:19:38,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2475 transitions. [2022-07-19 21:19:38,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:38,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2475 transitions. [2022-07-19 21:19:38,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.0) internal successors, (2475), 9 states have internal predecessors, (2475), 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 21:19:38,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 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 21:19:38,765 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 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 21:19:38,765 INFO L186 Difference]: Start difference. First operand has 290 places, 287 transitions, 622 flow. Second operand 9 states and 2475 transitions. [2022-07-19 21:19:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 297 transitions, 694 flow [2022-07-19 21:19:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 297 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:38,769 INFO L242 Difference]: Finished difference. Result has 300 places, 293 transitions, 670 flow [2022-07-19 21:19:38,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=300, PETRI_TRANSITIONS=293} [2022-07-19 21:19:38,769 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 11 predicate places. [2022-07-19 21:19:38,770 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 670 flow [2022-07-19 21:19:38,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 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 21:19:38,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:38,771 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:38,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:38,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:19:38,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:38,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2078839546, now seen corresponding path program 2 times [2022-07-19 21:19:38,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:38,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009665690] [2022-07-19 21:19:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:38,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 21:19:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009665690] [2022-07-19 21:19:39,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009665690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754543919] [2022-07-19 21:19:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:19:39,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:39,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:39,017 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:19:39,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:19:39,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:19:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:39,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:19:39,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754543919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:39,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:39,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-19 21:19:39,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221400425] [2022-07-19 21:19:39,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:39,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:19:39,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:39,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:19:39,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:19:39,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 341 [2022-07-19 21:19:39,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 293 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 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 21:19:39,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:39,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 341 [2022-07-19 21:19:39,222 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:39,488 INFO L129 PetriNetUnfolder]: 12/479 cut-off events. [2022-07-19 21:19:39,488 INFO L130 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-07-19 21:19:39,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 479 events. 12/479 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1720 event pairs, 2 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 636. Up to 29 conditions per place. [2022-07-19 21:19:39,493 INFO L132 encePairwiseOnDemand]: 330/341 looper letters, 35 selfloop transitions, 26 changer transitions 0/325 dead transitions. [2022-07-19 21:19:39,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 325 transitions, 918 flow [2022-07-19 21:19:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 21:19:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-19 21:19:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6691 transitions. [2022-07-19 21:19:39,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7848680351906159 [2022-07-19 21:19:39,497 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6691 transitions. [2022-07-19 21:19:39,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6691 transitions. [2022-07-19 21:19:39,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:39,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6691 transitions. [2022-07-19 21:19:39,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 267.64) internal successors, (6691), 25 states have internal predecessors, (6691), 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 21:19:39,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 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 21:19:39,511 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 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 21:19:39,511 INFO L186 Difference]: Start difference. First operand has 300 places, 293 transitions, 670 flow. Second operand 25 states and 6691 transitions. [2022-07-19 21:19:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 325 transitions, 918 flow [2022-07-19 21:19:39,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 325 transitions, 904 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:39,515 INFO L242 Difference]: Finished difference. Result has 331 places, 309 transitions, 828 flow [2022-07-19 21:19:39,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=828, PETRI_PLACES=331, PETRI_TRANSITIONS=309} [2022-07-19 21:19:39,516 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 42 predicate places. [2022-07-19 21:19:39,516 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 309 transitions, 828 flow [2022-07-19 21:19:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 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 21:19:39,517 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:39,517 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:39,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:39,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -497132495, now seen corresponding path program 1 times [2022-07-19 21:19:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882075214] [2022-07-19 21:19:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882075214] [2022-07-19 21:19:39,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882075214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:39,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664759031] [2022-07-19 21:19:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:39,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:39,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:39,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:39,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:19:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 21:19:39,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:39,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:40,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664759031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:40,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:40,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-19 21:19:40,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357423871] [2022-07-19 21:19:40,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:19:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:19:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:19:40,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-07-19 21:19:40,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 309 transitions, 828 flow. Second operand has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 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 21:19:40,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:40,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-07-19 21:19:40,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:40,370 INFO L129 PetriNetUnfolder]: 12/494 cut-off events. [2022-07-19 21:19:40,371 INFO L130 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-07-19 21:19:40,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 494 events. 12/494 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1721 event pairs, 2 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 728. Up to 20 conditions per place. [2022-07-19 21:19:40,377 INFO L132 encePairwiseOnDemand]: 335/341 looper letters, 30 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2022-07-19 21:19:40,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 335 transitions, 1094 flow [2022-07-19 21:19:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 21:19:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-19 21:19:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8223 transitions. [2022-07-19 21:19:40,381 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038123167155425 [2022-07-19 21:19:40,382 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8223 transitions. [2022-07-19 21:19:40,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8223 transitions. [2022-07-19 21:19:40,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:40,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8223 transitions. [2022-07-19 21:19:40,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 274.1) internal successors, (8223), 30 states have internal predecessors, (8223), 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 21:19:40,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 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 21:19:40,401 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 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 21:19:40,401 INFO L186 Difference]: Start difference. First operand has 331 places, 309 transitions, 828 flow. Second operand 30 states and 8223 transitions. [2022-07-19 21:19:40,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 335 transitions, 1094 flow [2022-07-19 21:19:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 335 transitions, 1060 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-19 21:19:40,407 INFO L242 Difference]: Finished difference. Result has 357 places, 319 transitions, 952 flow [2022-07-19 21:19:40,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=952, PETRI_PLACES=357, PETRI_TRANSITIONS=319} [2022-07-19 21:19:40,408 INFO L279 CegarLoopForPetriNet]: 289 programPoint places, 68 predicate places. [2022-07-19 21:19:40,408 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 319 transitions, 952 flow [2022-07-19 21:19:40,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 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 21:19:40,409 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:40,410 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:19:40,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:40,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:40,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:19:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 28146467, now seen corresponding path program 2 times [2022-07-19 21:19:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:40,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047962073] [2022-07-19 21:19:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:40,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-19 21:19:40,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047962073] [2022-07-19 21:19:40,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047962073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:40,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:40,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-19 21:19:40,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024887967] [2022-07-19 21:19:40,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:40,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 21:19:40,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 21:19:40,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:19:40,824 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 341 [2022-07-19 21:19:40,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 319 transitions, 952 flow. Second operand has 13 states, 13 states have (on average 203.15384615384616) internal successors, (2641), 13 states have internal predecessors, (2641), 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 21:19:40,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:40,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 341 [2022-07-19 21:19:40,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand