./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c -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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:59:37,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:59:37,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:59:37,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:59:37,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:59:37,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:59:37,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:59:37,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:59:37,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:59:37,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:59:37,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:59:37,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:59:37,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:59:37,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:59:37,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:59:37,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:59:37,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:59:37,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:59:37,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:59:37,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:59:37,197 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:59:37,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:59:37,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:59:37,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:59:37,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:59:37,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:59:37,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:59:37,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:59:37,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:59:37,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:59:37,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:59:37,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:59:37,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:59:37,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:59:37,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:59:37,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:59:37,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:59:37,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:59:37,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:59:37,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:59:37,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:59:37,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:59:37,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:59:37,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:59:37,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:59:37,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:59:37,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:59:37,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:59:37,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:59:37,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:59:37,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:59:37,253 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:59:37,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:59:37,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:59:37,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:59:37,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:59:37,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:59:37,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:59:37,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:59:37,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:59:37,256 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:59:37,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:59:37,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:59:37,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:59:37,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:59:37,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:59:37,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:59:37,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:59:37,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:59:37,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:59:37,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:59:37,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:59:37,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:59:37,259 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:59:37,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:59:37,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:59:37,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 [2022-07-13 21:59:37,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:59:37,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:59:37,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:59:37,482 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:59:37,483 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:59:37,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-07-13 21:59:37,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a61e9645/76e64d25b61f4d4bb035fccb649ab8c8/FLAGf30ffed61 [2022-07-13 21:59:37,892 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:59:37,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-07-13 21:59:37,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a61e9645/76e64d25b61f4d4bb035fccb649ab8c8/FLAGf30ffed61 [2022-07-13 21:59:38,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a61e9645/76e64d25b61f4d4bb035fccb649ab8c8 [2022-07-13 21:59:38,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:59:38,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:59:38,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:59:38,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:59:38,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:59:38,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d9a83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38, skipping insertion in model container [2022-07-13 21:59:38,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:59:38,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:59:38,514 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/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-07-13 21:59:38,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:59:38,523 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:59:38,544 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/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-07-13 21:59:38,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:59:38,557 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:59:38,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38 WrapperNode [2022-07-13 21:59:38,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:59:38,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:59:38,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:59:38,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:59:38,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,615 INFO L137 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-13 21:59:38,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:59:38,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:59:38,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:59:38,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:59:38,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:59:38,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:59:38,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:59:38,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:59:38,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (1/1) ... [2022-07-13 21:59:38,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:59:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:38,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:59:38,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:59:38,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:59:38,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 21:59:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 21:59:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 21:59:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 21:59:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 21:59:38,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 21:59:38,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 21:59:38,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 21:59:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:59:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:59:38,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:59:38,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:59:38,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:59:38,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:59:38,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:59:38,745 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:59:38,837 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:59:38,838 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:59:39,095 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:59:39,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:59:39,108 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 21:59:39,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:59:39 BoogieIcfgContainer [2022-07-13 21:59:39,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:59:39,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:59:39,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:59:39,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:59:39,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:59:38" (1/3) ... [2022-07-13 21:59:39,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68938780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:59:39, skipping insertion in model container [2022-07-13 21:59:39,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:59:38" (2/3) ... [2022-07-13 21:59:39,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68938780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:59:39, skipping insertion in model container [2022-07-13 21:59:39,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:59:39" (3/3) ... [2022-07-13 21:59:39,121 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2022-07-13 21:59:39,125 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:59:39,132 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:59:39,132 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:59:39,133 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:59:39,183 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:59:39,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 125 transitions, 282 flow [2022-07-13 21:59:39,271 INFO L129 PetriNetUnfolder]: 10/121 cut-off events. [2022-07-13 21:59:39,271 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:59:39,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 121 events. 10/121 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2022-07-13 21:59:39,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 125 transitions, 282 flow [2022-07-13 21:59:39,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 108 transitions, 240 flow [2022-07-13 21:59:39,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:59:39,300 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@2f5b2ebd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@383905b1 [2022-07-13 21:59:39,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 21:59:39,328 INFO L129 PetriNetUnfolder]: 10/107 cut-off events. [2022-07-13 21:59:39,328 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:59:39,328 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:39,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:39,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:39,334 INFO L85 PathProgramCache]: Analyzing trace with hash 129648811, now seen corresponding path program 1 times [2022-07-13 21:59:39,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:39,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778360494] [2022-07-13 21:59:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:39,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:39,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778360494] [2022-07-13 21:59:39,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778360494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:39,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:39,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:59:39,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792126300] [2022-07-13 21:59:39,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:59:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:59:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:59:39,669 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 125 [2022-07-13 21:59:39,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 240 flow. Second operand has 2 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:39,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:39,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 125 [2022-07-13 21:59:39,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:39,751 INFO L129 PetriNetUnfolder]: 4/102 cut-off events. [2022-07-13 21:59:39,751 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:59:39,753 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 102 events. 4/102 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 18/114 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-13 21:59:39,755 INFO L132 encePairwiseOnDemand]: 119/125 looper letters, 8 selfloop transitions, 0 changer transitions 2/102 dead transitions. [2022-07-13 21:59:39,755 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 244 flow [2022-07-13 21:59:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:59:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:59:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 234 transitions. [2022-07-13 21:59:39,769 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.936 [2022-07-13 21:59:39,770 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 234 transitions. [2022-07-13 21:59:39,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 234 transitions. [2022-07-13 21:59:39,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:39,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 234 transitions. [2022-07-13 21:59:39,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:39,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:39,791 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:39,793 INFO L186 Difference]: Start difference. First operand has 111 places, 108 transitions, 240 flow. Second operand 2 states and 234 transitions. [2022-07-13 21:59:39,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 244 flow [2022-07-13 21:59:39,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 21:59:39,804 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 208 flow [2022-07-13 21:59:39,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=208, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-13 21:59:39,810 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-07-13 21:59:39,810 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 208 flow [2022-07-13 21:59:39,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:39,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:39,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:39,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:59:39,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:39,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:39,814 INFO L85 PathProgramCache]: Analyzing trace with hash 560355165, now seen corresponding path program 1 times [2022-07-13 21:59:39,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:39,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562209923] [2022-07-13 21:59:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:39,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:40,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562209923] [2022-07-13 21:59:40,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562209923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:40,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:40,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:59:40,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575901274] [2022-07-13 21:59:40,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:40,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:59:40,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:59:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:59:40,232 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 125 [2022-07-13 21:59:40,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:40,233 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:40,233 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 125 [2022-07-13 21:59:40,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:40,594 INFO L129 PetriNetUnfolder]: 895/1458 cut-off events. [2022-07-13 21:59:40,595 INFO L130 PetriNetUnfolder]: For 80/134 co-relation queries the response was YES. [2022-07-13 21:59:40,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2774 conditions, 1458 events. 895/1458 cut-off events. For 80/134 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6472 event pairs, 272 based on Foata normal form. 1/1011 useless extension candidates. Maximal degree in co-relation 2771. Up to 796 conditions per place. [2022-07-13 21:59:40,611 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 47 selfloop transitions, 7 changer transitions 4/122 dead transitions. [2022-07-13 21:59:40,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 122 transitions, 375 flow [2022-07-13 21:59:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:59:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:59:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2022-07-13 21:59:40,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7074285714285714 [2022-07-13 21:59:40,616 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2022-07-13 21:59:40,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2022-07-13 21:59:40,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:40,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2022-07-13 21:59:40,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:40,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:40,637 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:40,637 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 208 flow. Second operand 7 states and 619 transitions. [2022-07-13 21:59:40,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 122 transitions, 375 flow [2022-07-13 21:59:40,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 122 transitions, 375 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:59:40,642 INFO L242 Difference]: Finished difference. Result has 111 places, 104 transitions, 249 flow [2022-07-13 21:59:40,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2022-07-13 21:59:40,644 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 0 predicate places. [2022-07-13 21:59:40,644 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 249 flow [2022-07-13 21:59:40,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:40,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:40,645 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:40,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:59:40,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1559793883, now seen corresponding path program 1 times [2022-07-13 21:59:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:40,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141815014] [2022-07-13 21:59:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:40,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:40,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141815014] [2022-07-13 21:59:40,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141815014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:40,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:40,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:59:40,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842736193] [2022-07-13 21:59:40,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:40,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:59:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:59:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:59:40,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 125 [2022-07-13 21:59:40,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:40,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:40,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 125 [2022-07-13 21:59:40,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:41,226 INFO L129 PetriNetUnfolder]: 1043/2032 cut-off events. [2022-07-13 21:59:41,226 INFO L130 PetriNetUnfolder]: For 229/268 co-relation queries the response was YES. [2022-07-13 21:59:41,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 2032 events. 1043/2032 cut-off events. For 229/268 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11929 event pairs, 266 based on Foata normal form. 1/1431 useless extension candidates. Maximal degree in co-relation 3999. Up to 512 conditions per place. [2022-07-13 21:59:41,275 INFO L132 encePairwiseOnDemand]: 112/125 looper letters, 58 selfloop transitions, 19 changer transitions 0/147 dead transitions. [2022-07-13 21:59:41,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 147 transitions, 522 flow [2022-07-13 21:59:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:59:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 21:59:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 662 transitions. [2022-07-13 21:59:41,278 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7565714285714286 [2022-07-13 21:59:41,278 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 662 transitions. [2022-07-13 21:59:41,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 662 transitions. [2022-07-13 21:59:41,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:41,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 662 transitions. [2022-07-13 21:59:41,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.57142857142857) internal successors, (662), 7 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:41,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:41,282 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 125.0) internal successors, (1000), 8 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:41,283 INFO L186 Difference]: Start difference. First operand has 111 places, 104 transitions, 249 flow. Second operand 7 states and 662 transitions. [2022-07-13 21:59:41,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 147 transitions, 522 flow [2022-07-13 21:59:41,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 503 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-13 21:59:41,288 INFO L242 Difference]: Finished difference. Result has 113 places, 114 transitions, 342 flow [2022-07-13 21:59:41,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=113, PETRI_TRANSITIONS=114} [2022-07-13 21:59:41,289 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 2 predicate places. [2022-07-13 21:59:41,289 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 114 transitions, 342 flow [2022-07-13 21:59:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:41,290 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:41,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:41,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:59:41,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash 920643877, now seen corresponding path program 1 times [2022-07-13 21:59:41,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:41,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330139725] [2022-07-13 21:59:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330139725] [2022-07-13 21:59:41,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330139725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843308297] [2022-07-13 21:59:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:41,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:41,490 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) [2022-07-13 21:59:41,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:59:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:59:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:41,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:42,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843308297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:42,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:42,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 21:59:42,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041151481] [2022-07-13 21:59:42,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:42,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 21:59:42,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 21:59:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 21:59:42,078 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 21:59:42,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 114 transitions, 342 flow. Second operand has 14 states, 14 states have (on average 81.71428571428571) internal successors, (1144), 14 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:42,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:42,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 21:59:42,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:43,271 INFO L129 PetriNetUnfolder]: 2556/4598 cut-off events. [2022-07-13 21:59:43,271 INFO L130 PetriNetUnfolder]: For 3486/3505 co-relation queries the response was YES. [2022-07-13 21:59:43,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 4598 events. 2556/4598 cut-off events. For 3486/3505 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29747 event pairs, 270 based on Foata normal form. 1/4004 useless extension candidates. Maximal degree in co-relation 11811. Up to 1129 conditions per place. [2022-07-13 21:59:43,336 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 175 selfloop transitions, 30 changer transitions 1/268 dead transitions. [2022-07-13 21:59:43,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 268 transitions, 1440 flow [2022-07-13 21:59:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:59:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 21:59:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1252 transitions. [2022-07-13 21:59:43,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7154285714285714 [2022-07-13 21:59:43,341 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1252 transitions. [2022-07-13 21:59:43,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1252 transitions. [2022-07-13 21:59:43,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:43,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1252 transitions. [2022-07-13 21:59:43,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.42857142857143) internal successors, (1252), 14 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:43,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:43,348 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:43,348 INFO L186 Difference]: Start difference. First operand has 113 places, 114 transitions, 342 flow. Second operand 14 states and 1252 transitions. [2022-07-13 21:59:43,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 268 transitions, 1440 flow [2022-07-13 21:59:43,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 268 transitions, 1436 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 21:59:43,362 INFO L242 Difference]: Finished difference. Result has 133 places, 132 transitions, 549 flow [2022-07-13 21:59:43,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=549, PETRI_PLACES=133, PETRI_TRANSITIONS=132} [2022-07-13 21:59:43,363 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 22 predicate places. [2022-07-13 21:59:43,363 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 132 transitions, 549 flow [2022-07-13 21:59:43,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.71428571428571) internal successors, (1144), 14 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:43,364 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:43,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:43,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:43,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:43,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash -571222771, now seen corresponding path program 2 times [2022-07-13 21:59:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:43,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106348130] [2022-07-13 21:59:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:43,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106348130] [2022-07-13 21:59:43,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106348130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:43,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:43,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:59:43,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566403169] [2022-07-13 21:59:43,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:43,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:59:43,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:43,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:59:43,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:59:43,792 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 21:59:43,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 132 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:43,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:43,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 21:59:43,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:44,471 INFO L129 PetriNetUnfolder]: 2506/4537 cut-off events. [2022-07-13 21:59:44,471 INFO L130 PetriNetUnfolder]: For 9876/9971 co-relation queries the response was YES. [2022-07-13 21:59:44,485 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15051 conditions, 4537 events. 2506/4537 cut-off events. For 9876/9971 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29778 event pairs, 896 based on Foata normal form. 26/4246 useless extension candidates. Maximal degree in co-relation 15034. Up to 3151 conditions per place. [2022-07-13 21:59:44,512 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 81 selfloop transitions, 15 changer transitions 2/160 dead transitions. [2022-07-13 21:59:44,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 885 flow [2022-07-13 21:59:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:59:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:59:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2022-07-13 21:59:44,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2022-07-13 21:59:44,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2022-07-13 21:59:44,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2022-07-13 21:59:44,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:44,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2022-07-13 21:59:44,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:44,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:44,518 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:44,519 INFO L186 Difference]: Start difference. First operand has 133 places, 132 transitions, 549 flow. Second operand 6 states and 538 transitions. [2022-07-13 21:59:44,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 885 flow [2022-07-13 21:59:44,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 160 transitions, 868 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 21:59:44,533 INFO L242 Difference]: Finished difference. Result has 136 places, 134 transitions, 587 flow [2022-07-13 21:59:44,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=587, PETRI_PLACES=136, PETRI_TRANSITIONS=134} [2022-07-13 21:59:44,534 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 25 predicate places. [2022-07-13 21:59:44,534 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 134 transitions, 587 flow [2022-07-13 21:59:44,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:44,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:44,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:59:44,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1166830447, now seen corresponding path program 2 times [2022-07-13 21:59:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:44,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368830352] [2022-07-13 21:59:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368830352] [2022-07-13 21:59:44,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368830352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:44,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:44,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:59:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283118676] [2022-07-13 21:59:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:59:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:59:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:59:44,694 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 21:59:44,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 134 transitions, 587 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:44,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:44,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 21:59:44,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:45,446 INFO L129 PetriNetUnfolder]: 2307/4169 cut-off events. [2022-07-13 21:59:45,446 INFO L130 PetriNetUnfolder]: For 10203/10286 co-relation queries the response was YES. [2022-07-13 21:59:45,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14651 conditions, 4169 events. 2307/4169 cut-off events. For 10203/10286 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26701 event pairs, 1058 based on Foata normal form. 32/3915 useless extension candidates. Maximal degree in co-relation 14631. Up to 2939 conditions per place. [2022-07-13 21:59:45,576 INFO L132 encePairwiseOnDemand]: 114/125 looper letters, 82 selfloop transitions, 18 changer transitions 5/167 dead transitions. [2022-07-13 21:59:45,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 167 transitions, 1009 flow [2022-07-13 21:59:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:59:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:59:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2022-07-13 21:59:45,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7173333333333334 [2022-07-13 21:59:45,615 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2022-07-13 21:59:45,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2022-07-13 21:59:45,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:45,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2022-07-13 21:59:45,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:45,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:45,618 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:45,618 INFO L186 Difference]: Start difference. First operand has 136 places, 134 transitions, 587 flow. Second operand 6 states and 538 transitions. [2022-07-13 21:59:45,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 167 transitions, 1009 flow [2022-07-13 21:59:45,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 167 transitions, 987 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 21:59:45,632 INFO L242 Difference]: Finished difference. Result has 140 places, 139 transitions, 689 flow [2022-07-13 21:59:45,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2022-07-13 21:59:45,633 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 29 predicate places. [2022-07-13 21:59:45,633 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 689 flow [2022-07-13 21:59:45,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:45,633 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:45,634 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:45,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:59:45,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 557506817, now seen corresponding path program 1 times [2022-07-13 21:59:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641232004] [2022-07-13 21:59:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:45,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:45,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641232004] [2022-07-13 21:59:45,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641232004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:45,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480830057] [2022-07-13 21:59:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:45,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:45,873 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) [2022-07-13 21:59:45,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:59:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:59:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:46,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:46,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480830057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:46,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:46,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 21:59:46,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606941373] [2022-07-13 21:59:46,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:46,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 21:59:46,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 21:59:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 21:59:46,434 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 21:59:46,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 689 flow. Second operand has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:46,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:46,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 21:59:46,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:47,679 INFO L129 PetriNetUnfolder]: 3235/5863 cut-off events. [2022-07-13 21:59:47,679 INFO L130 PetriNetUnfolder]: For 16618/16722 co-relation queries the response was YES. [2022-07-13 21:59:47,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21013 conditions, 5863 events. 3235/5863 cut-off events. For 16618/16722 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40482 event pairs, 458 based on Foata normal form. 177/5802 useless extension candidates. Maximal degree in co-relation 20991. Up to 1542 conditions per place. [2022-07-13 21:59:47,743 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 206 selfloop transitions, 34 changer transitions 2/304 dead transitions. [2022-07-13 21:59:47,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 304 transitions, 2235 flow [2022-07-13 21:59:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:59:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 21:59:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1248 transitions. [2022-07-13 21:59:47,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7131428571428572 [2022-07-13 21:59:47,747 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1248 transitions. [2022-07-13 21:59:47,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1248 transitions. [2022-07-13 21:59:47,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:47,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1248 transitions. [2022-07-13 21:59:47,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.14285714285714) internal successors, (1248), 14 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:47,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:47,754 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:47,754 INFO L186 Difference]: Start difference. First operand has 140 places, 139 transitions, 689 flow. Second operand 14 states and 1248 transitions. [2022-07-13 21:59:47,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 304 transitions, 2235 flow [2022-07-13 21:59:47,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 304 transitions, 2157 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-13 21:59:47,781 INFO L242 Difference]: Finished difference. Result has 157 places, 149 transitions, 842 flow [2022-07-13 21:59:47,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=842, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2022-07-13 21:59:47,782 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 46 predicate places. [2022-07-13 21:59:47,782 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 842 flow [2022-07-13 21:59:47,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.28571428571429) internal successors, (1152), 14 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:47,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:47,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:47,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:48,007 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,SelfDestructingSolverStorable6 [2022-07-13 21:59:48,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:48,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1750943981, now seen corresponding path program 2 times [2022-07-13 21:59:48,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:48,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747969311] [2022-07-13 21:59:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:48,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:48,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747969311] [2022-07-13 21:59:48,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747969311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:59:48,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:59:48,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:59:48,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445495469] [2022-07-13 21:59:48,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:59:48,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:59:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:48,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:59:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:59:48,213 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 21:59:48,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:48,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:48,214 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 21:59:48,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:48,934 INFO L129 PetriNetUnfolder]: 3125/5514 cut-off events. [2022-07-13 21:59:48,934 INFO L130 PetriNetUnfolder]: For 18961/19023 co-relation queries the response was YES. [2022-07-13 21:59:48,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22407 conditions, 5514 events. 3125/5514 cut-off events. For 18961/19023 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37200 event pairs, 848 based on Foata normal form. 10/5332 useless extension candidates. Maximal degree in co-relation 22379. Up to 4139 conditions per place. [2022-07-13 21:59:49,007 INFO L132 encePairwiseOnDemand]: 115/125 looper letters, 89 selfloop transitions, 17 changer transitions 8/176 dead transitions. [2022-07-13 21:59:49,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 176 transitions, 1224 flow [2022-07-13 21:59:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:59:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 21:59:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2022-07-13 21:59:49,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.716 [2022-07-13 21:59:49,010 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2022-07-13 21:59:49,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2022-07-13 21:59:49,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:49,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2022-07-13 21:59:49,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:49,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:49,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 125.0) internal successors, (875), 7 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:49,014 INFO L186 Difference]: Start difference. First operand has 157 places, 149 transitions, 842 flow. Second operand 6 states and 537 transitions. [2022-07-13 21:59:49,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 176 transitions, 1224 flow [2022-07-13 21:59:49,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 176 transitions, 1189 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-13 21:59:49,082 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 858 flow [2022-07-13 21:59:49,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=858, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2022-07-13 21:59:49,083 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 48 predicate places. [2022-07-13 21:59:49,083 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 858 flow [2022-07-13 21:59:49,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:49,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:49,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:49,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:59:49,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1325521599, now seen corresponding path program 3 times [2022-07-13 21:59:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:49,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444696039] [2022-07-13 21:59:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:49,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444696039] [2022-07-13 21:59:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444696039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604799417] [2022-07-13 21:59:49,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:59:49,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:49,196 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) [2022-07-13 21:59:49,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:59:49,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 21:59:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:59:49,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:59:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:49,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604799417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:49,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:49,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-13 21:59:49,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611935085] [2022-07-13 21:59:49,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:59:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:59:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:59:49,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 125 [2022-07-13 21:59:49,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 858 flow. Second operand has 10 states, 10 states have (on average 88.4) internal successors, (884), 10 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:49,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:49,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 125 [2022-07-13 21:59:49,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:50,547 INFO L129 PetriNetUnfolder]: 3265/6219 cut-off events. [2022-07-13 21:59:50,548 INFO L130 PetriNetUnfolder]: For 20783/20885 co-relation queries the response was YES. [2022-07-13 21:59:50,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24384 conditions, 6219 events. 3265/6219 cut-off events. For 20783/20885 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46909 event pairs, 373 based on Foata normal form. 158/6131 useless extension candidates. Maximal degree in co-relation 24353. Up to 2069 conditions per place. [2022-07-13 21:59:50,641 INFO L132 encePairwiseOnDemand]: 112/125 looper letters, 131 selfloop transitions, 30 changer transitions 0/240 dead transitions. [2022-07-13 21:59:50,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 240 transitions, 1771 flow [2022-07-13 21:59:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:59:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-13 21:59:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1106 transitions. [2022-07-13 21:59:50,645 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7373333333333333 [2022-07-13 21:59:50,645 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1106 transitions. [2022-07-13 21:59:50,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1106 transitions. [2022-07-13 21:59:50,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:50,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1106 transitions. [2022-07-13 21:59:50,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.16666666666667) internal successors, (1106), 12 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:50,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:50,652 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 125.0) internal successors, (1625), 13 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:50,652 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 858 flow. Second operand 12 states and 1106 transitions. [2022-07-13 21:59:50,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 240 transitions, 1771 flow [2022-07-13 21:59:50,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 240 transitions, 1746 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-13 21:59:50,740 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 996 flow [2022-07-13 21:59:50,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=996, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2022-07-13 21:59:50,741 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 59 predicate places. [2022-07-13 21:59:50,742 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 996 flow [2022-07-13 21:59:50,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 88.4) internal successors, (884), 10 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:50,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:50,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:50,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:59:50,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:50,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:50,967 INFO L85 PathProgramCache]: Analyzing trace with hash -13600267, now seen corresponding path program 1 times [2022-07-13 21:59:50,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:50,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303059236] [2022-07-13 21:59:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:50,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303059236] [2022-07-13 21:59:51,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303059236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483766708] [2022-07-13 21:59:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:51,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:51,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:51,156 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) [2022-07-13 21:59:51,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:59:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:59:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:59:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:51,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:59:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483766708] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:59:51,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:59:51,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 21:59:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193337580] [2022-07-13 21:59:51,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:59:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 21:59:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:59:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 21:59:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 21:59:51,615 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 21:59:51,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 996 flow. Second operand has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:51,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:59:51,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 21:59:51,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:59:52,916 INFO L129 PetriNetUnfolder]: 5063/8597 cut-off events. [2022-07-13 21:59:52,916 INFO L130 PetriNetUnfolder]: For 40129/40192 co-relation queries the response was YES. [2022-07-13 21:59:52,978 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38136 conditions, 8597 events. 5063/8597 cut-off events. For 40129/40192 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60765 event pairs, 980 based on Foata normal form. 132/8573 useless extension candidates. Maximal degree in co-relation 38103. Up to 3224 conditions per place. [2022-07-13 21:59:53,034 INFO L132 encePairwiseOnDemand]: 110/125 looper letters, 296 selfloop transitions, 32 changer transitions 2/392 dead transitions. [2022-07-13 21:59:53,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 392 transitions, 3771 flow [2022-07-13 21:59:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:59:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 21:59:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1246 transitions. [2022-07-13 21:59:53,038 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.712 [2022-07-13 21:59:53,039 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1246 transitions. [2022-07-13 21:59:53,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1246 transitions. [2022-07-13 21:59:53,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:59:53,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1246 transitions. [2022-07-13 21:59:53,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:53,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:53,141 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 125.0) internal successors, (1875), 15 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:53,141 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 996 flow. Second operand 14 states and 1246 transitions. [2022-07-13 21:59:53,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 392 transitions, 3771 flow [2022-07-13 21:59:53,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 392 transitions, 3571 flow, removed 70 selfloop flow, removed 6 redundant places. [2022-07-13 21:59:53,392 INFO L242 Difference]: Finished difference. Result has 181 places, 164 transitions, 1091 flow [2022-07-13 21:59:53,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1091, PETRI_PLACES=181, PETRI_TRANSITIONS=164} [2022-07-13 21:59:53,393 INFO L279 CegarLoopForPetriNet]: 111 programPoint places, 70 predicate places. [2022-07-13 21:59:53,393 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 164 transitions, 1091 flow [2022-07-13 21:59:53,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:59:53,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:59:53,394 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:59:53,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 21:59:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:53,597 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 21:59:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:59:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash -95233455, now seen corresponding path program 1 times [2022-07-13 21:59:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:59:53,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893366144] [2022-07-13 21:59:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:59:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:59:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:59:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893366144] [2022-07-13 21:59:54,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893366144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:59:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238747930] [2022-07-13 21:59:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:59:54,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:59:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:59:54,028 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) [2022-07-13 21:59:54,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:59:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:59:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 21:59:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:00:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:15,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:00:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:00:38,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238747930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:00:38,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:00:38,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-07-13 22:00:38,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608004908] [2022-07-13 22:00:38,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:00:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 22:00:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:00:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 22:00:38,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=546, Unknown=5, NotChecked=0, Total=702 [2022-07-13 22:00:38,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 125 [2022-07-13 22:00:38,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 164 transitions, 1091 flow. Second operand has 27 states, 27 states have (on average 80.5925925925926) internal successors, (2176), 27 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:00:38,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:00:38,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 125 [2022-07-13 22:00:38,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:00:40,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:00:42,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:00:44,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:00:46,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:00:49,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:00:56,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:00:58,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:00,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:02,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:04,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:06,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:07,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:14,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:17,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:26,093 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 62 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:01:30,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:32,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:34,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:36,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:38,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:47,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:49,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:51,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:01:55,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:16,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:25,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:27,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:30,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:35,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:36,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:38,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:02:47,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:09,692 WARN L233 SmtUtils]: Spent 19.88s on a formula simplification. DAG size of input: 79 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:03:27,882 WARN L233 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 82 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:03:29,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:32,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:34,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:36,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:40,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:43,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:45,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-13 22:03:46,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []