./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/popl20-proofs-counter-add-4-semi-Q67.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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:38:35,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:38:35,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:38:35,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:38:35,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:38:35,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:38:35,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:38:35,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:38:35,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:38:35,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:38:35,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:38:35,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:38:35,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:38:35,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:38:35,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:38:35,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:38:35,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:38:35,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:38:35,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:38:35,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:38:35,127 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:38:35,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:38:35,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:38:35,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:38:35,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:38:35,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:38:35,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:38:35,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:38:35,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:38:35,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:38:35,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:38:35,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:38:35,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:38:35,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:38:35,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:38:35,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:38:35,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:38:35,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:38:35,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:38:35,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:38:35,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:38:35,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:38:35,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:38:35,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:38:35,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:38:35,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:38:35,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:38:35,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:38:35,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:38:35,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:38:35,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:38:35,169 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:38:35,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:38:35,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:38:35,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:38:35,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:38:35,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:38:35,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:38:35,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:38:35,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:38:35,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:38:35,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:38:35,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:38:35,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:38:35,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:38:35,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:38:35,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:38:35,173 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:38:35,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:38:35,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:38:35,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-07-12 10:38:35,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:38:35,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:38:35,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:38:35,413 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:38:35,413 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:38:35,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-12 10:38:35,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79153be2/a5a8284dd8e146b5ba820d613a2d0916/FLAG503e6c613 [2022-07-12 10:38:35,837 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:38:35,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-12 10:38:35,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79153be2/a5a8284dd8e146b5ba820d613a2d0916/FLAG503e6c613 [2022-07-12 10:38:35,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a79153be2/a5a8284dd8e146b5ba820d613a2d0916 [2022-07-12 10:38:35,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:38:35,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:38:35,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:38:35,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:38:35,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:38:35,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:38:35" (1/1) ... [2022-07-12 10:38:35,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6cefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:35, skipping insertion in model container [2022-07-12 10:38:35,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:38:35" (1/1) ... [2022-07-12 10:38:35,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:38:35,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:38:36,074 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/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-07-12 10:38:36,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:38:36,085 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:38:36,120 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/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-07-12 10:38:36,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:38:36,133 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:38:36,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36 WrapperNode [2022-07-12 10:38:36,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:38:36,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:38:36,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:38:36,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:38:36,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,175 INFO L137 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-07-12 10:38:36,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:38:36,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:38:36,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:38:36,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:38:36,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:38:36,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:38:36,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:38:36,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:38:36,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (1/1) ... [2022-07-12 10:38:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:38:36,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:36,236 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) [2022-07-12 10:38:36,241 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 [2022-07-12 10:38:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:38:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:38:36,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:38:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:38:36,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:38:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:38:36,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:38:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-12 10:38:36,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-12 10:38:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:38:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:38:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:38:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:38:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:38:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:38:36,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:38:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:38:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:38:36,279 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:38:36,333 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:38:36,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:38:36,552 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:38:36,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:38:36,602 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:38:36,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:38:36 BoogieIcfgContainer [2022-07-12 10:38:36,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:38:36,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:38:36,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:38:36,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:38:36,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:38:35" (1/3) ... [2022-07-12 10:38:36,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445188d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:38:36, skipping insertion in model container [2022-07-12 10:38:36,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:38:36" (2/3) ... [2022-07-12 10:38:36,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445188d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:38:36, skipping insertion in model container [2022-07-12 10:38:36,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:38:36" (3/3) ... [2022-07-12 10:38:36,610 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-07-12 10:38:36,613 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:38:36,619 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:38:36,619 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:38:36,619 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:38:36,683 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:38:36,721 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 294 flow [2022-07-12 10:38:36,777 INFO L129 PetriNetUnfolder]: 10/127 cut-off events. [2022-07-12 10:38:36,777 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:38:36,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2022-07-12 10:38:36,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 294 flow [2022-07-12 10:38:36,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2022-07-12 10:38:36,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:38:36,801 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@7b75d29, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d6a9a60 [2022-07-12 10:38:36,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-12 10:38:36,841 INFO L129 PetriNetUnfolder]: 10/113 cut-off events. [2022-07-12 10:38:36,841 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:38:36,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:36,842 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, 1, 1] [2022-07-12 10:38:36,843 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)] === [2022-07-12 10:38:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1136845032, now seen corresponding path program 1 times [2022-07-12 10:38:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:36,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671077765] [2022-07-12 10:38:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:36,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:37,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:37,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671077765] [2022-07-12 10:38:37,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671077765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:37,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:37,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:38:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665738789] [2022-07-12 10:38:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:37,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:38:37,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:37,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:38:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:38:37,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 131 [2022-07-12 10:38:37,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 252 flow. Second operand has 2 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) [2022-07-12 10:38:37,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:37,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 131 [2022-07-12 10:38:37,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:37,180 INFO L129 PetriNetUnfolder]: 16/120 cut-off events. [2022-07-12 10:38:37,181 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:38:37,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 120 events. 16/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 18/132 useless extension candidates. Maximal degree in co-relation 98. Up to 25 conditions per place. [2022-07-12 10:38:37,183 INFO L132 encePairwiseOnDemand]: 125/131 looper letters, 12 selfloop transitions, 0 changer transitions 2/108 dead transitions. [2022-07-12 10:38:37,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 264 flow [2022-07-12 10:38:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:38:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:38:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 242 transitions. [2022-07-12 10:38:37,192 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9236641221374046 [2022-07-12 10:38:37,193 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 242 transitions. [2022-07-12 10:38:37,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 242 transitions. [2022-07-12 10:38:37,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:37,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 242 transitions. [2022-07-12 10:38:37,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,201 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,202 INFO L186 Difference]: Start difference. First operand has 117 places, 114 transitions, 252 flow. Second operand 2 states and 242 transitions. [2022-07-12 10:38:37,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 264 flow [2022-07-12 10:38:37,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:38:37,209 INFO L242 Difference]: Finished difference. Result has 110 places, 106 transitions, 220 flow [2022-07-12 10:38:37,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2022-07-12 10:38:37,214 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -7 predicate places. [2022-07-12 10:38:37,216 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 220 flow [2022-07-12 10:38:37,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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) [2022-07-12 10:38:37,216 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:37,217 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, 1, 1] [2022-07-12 10:38:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:38:37,217 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)] === [2022-07-12 10:38:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash 274536458, now seen corresponding path program 1 times [2022-07-12 10:38:37,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:37,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952885849] [2022-07-12 10:38:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:37,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:37,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952885849] [2022-07-12 10:38:37,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952885849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:37,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:37,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:38:37,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436877044] [2022-07-12 10:38:37,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:37,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:38:37,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:38:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:38:37,417 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-07-12 10:38:37,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:37,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-07-12 10:38:37,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:37,505 INFO L129 PetriNetUnfolder]: 23/173 cut-off events. [2022-07-12 10:38:37,506 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:38:37,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 173 events. 23/173 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 233 event pairs, 0 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 231. Up to 36 conditions per place. [2022-07-12 10:38:37,521 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 25 selfloop transitions, 3 changer transitions 5/118 dead transitions. [2022-07-12 10:38:37,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 317 flow [2022-07-12 10:38:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:38:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:38:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2022-07-12 10:38:37,527 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8259541984732824 [2022-07-12 10:38:37,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2022-07-12 10:38:37,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2022-07-12 10:38:37,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:37,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2022-07-12 10:38:37,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,533 INFO L186 Difference]: Start difference. First operand has 110 places, 106 transitions, 220 flow. Second operand 5 states and 541 transitions. [2022-07-12 10:38:37,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 317 flow [2022-07-12 10:38:37,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 317 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:38:37,537 INFO L242 Difference]: Finished difference. Result has 115 places, 108 transitions, 247 flow [2022-07-12 10:38:37,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2022-07-12 10:38:37,538 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, -2 predicate places. [2022-07-12 10:38:37,538 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 247 flow [2022-07-12 10:38:37,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:37,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:37,539 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, 1, 1, 1, 1] [2022-07-12 10:38:37,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:38:37,539 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)] === [2022-07-12 10:38:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash -575216244, now seen corresponding path program 1 times [2022-07-12 10:38:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:37,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527902920] [2022-07-12 10:38:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:37,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:37,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527902920] [2022-07-12 10:38:37,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527902920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636661098] [2022-07-12 10:38:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:37,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:37,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:37,796 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) [2022-07-12 10:38:37,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:38:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:37,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:38:37,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:38,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:38:38,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636661098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:38,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:38:38,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-12 10:38:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428454353] [2022-07-12 10:38:38,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:38,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:38:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:38:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:38:38,167 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-12 10:38:38,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 108 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:38,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:38,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-12 10:38:38,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:38,394 INFO L129 PetriNetUnfolder]: 270/677 cut-off events. [2022-07-12 10:38:38,395 INFO L130 PetriNetUnfolder]: For 152/167 co-relation queries the response was YES. [2022-07-12 10:38:38,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 677 events. 270/677 cut-off events. For 152/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2947 event pairs, 86 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 1376. Up to 179 conditions per place. [2022-07-12 10:38:38,400 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 56 selfloop transitions, 12 changer transitions 0/144 dead transitions. [2022-07-12 10:38:38,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 497 flow [2022-07-12 10:38:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:38:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:38:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2022-07-12 10:38:38,403 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7526717557251908 [2022-07-12 10:38:38,403 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2022-07-12 10:38:38,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2022-07-12 10:38:38,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:38,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2022-07-12 10:38:38,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:38,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:38,408 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:38,408 INFO L186 Difference]: Start difference. First operand has 115 places, 108 transitions, 247 flow. Second operand 10 states and 986 transitions. [2022-07-12 10:38:38,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 497 flow [2022-07-12 10:38:38,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 144 transitions, 481 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-12 10:38:38,411 INFO L242 Difference]: Finished difference. Result has 121 places, 115 transitions, 301 flow [2022-07-12 10:38:38,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2022-07-12 10:38:38,412 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 4 predicate places. [2022-07-12 10:38:38,412 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 301 flow [2022-07-12 10:38:38,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:38,413 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:38,413 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, 1, 1, 1, 1] [2022-07-12 10:38:38,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:38,630 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)] === [2022-07-12 10:38:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1981692516, now seen corresponding path program 2 times [2022-07-12 10:38:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:38,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873495408] [2022-07-12 10:38:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:38,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873495408] [2022-07-12 10:38:38,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873495408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383546062] [2022-07-12 10:38:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:38,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:38,786 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) [2022-07-12 10:38:38,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:38:38,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:38,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:38:38,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:39,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:38:39,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383546062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:39,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:38:39,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-12 10:38:39,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598262439] [2022-07-12 10:38:39,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:39,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:38:39,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:38:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:38:39,153 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-12 10:38:39,154 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,154 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:39,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-12 10:38:39,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:39,364 INFO L129 PetriNetUnfolder]: 241/544 cut-off events. [2022-07-12 10:38:39,364 INFO L130 PetriNetUnfolder]: For 205/217 co-relation queries the response was YES. [2022-07-12 10:38:39,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 544 events. 241/544 cut-off events. For 205/217 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2014 event pairs, 59 based on Foata normal form. 5/489 useless extension candidates. Maximal degree in co-relation 1235. Up to 169 conditions per place. [2022-07-12 10:38:39,368 INFO L132 encePairwiseOnDemand]: 119/131 looper letters, 47 selfloop transitions, 12 changer transitions 0/135 dead transitions. [2022-07-12 10:38:39,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 480 flow [2022-07-12 10:38:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:38:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:38:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-07-12 10:38:39,371 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7442748091603053 [2022-07-12 10:38:39,371 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-07-12 10:38:39,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-07-12 10:38:39,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:39,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-07-12 10:38:39,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,375 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,375 INFO L186 Difference]: Start difference. First operand has 121 places, 115 transitions, 301 flow. Second operand 10 states and 975 transitions. [2022-07-12 10:38:39,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 480 flow [2022-07-12 10:38:39,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 135 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:39,379 INFO L242 Difference]: Finished difference. Result has 127 places, 114 transitions, 323 flow [2022-07-12 10:38:39,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2022-07-12 10:38:39,379 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 10 predicate places. [2022-07-12 10:38:39,380 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 323 flow [2022-07-12 10:38:39,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,380 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:39,380 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, 1, 1, 1, 1] [2022-07-12 10:38:39,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:39,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 10:38:39,596 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)] === [2022-07-12 10:38:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1358218546, now seen corresponding path program 1 times [2022-07-12 10:38:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:39,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82563875] [2022-07-12 10:38:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:39,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:39,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:39,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82563875] [2022-07-12 10:38:39,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82563875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:39,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:39,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:38:39,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904128490] [2022-07-12 10:38:39,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:39,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:38:39,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:38:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:38:39,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-12 10:38:39,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:39,713 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:39,713 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-12 10:38:39,713 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:40,112 INFO L129 PetriNetUnfolder]: 1833/3130 cut-off events. [2022-07-12 10:38:40,112 INFO L130 PetriNetUnfolder]: For 1785/1842 co-relation queries the response was YES. [2022-07-12 10:38:40,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 3130 events. 1833/3130 cut-off events. For 1785/1842 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18033 event pairs, 320 based on Foata normal form. 13/2625 useless extension candidates. Maximal degree in co-relation 7653. Up to 1083 conditions per place. [2022-07-12 10:38:40,131 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 83 selfloop transitions, 10 changer transitions 2/163 dead transitions. [2022-07-12 10:38:40,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 163 transitions, 682 flow [2022-07-12 10:38:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:38:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:38:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 761 transitions. [2022-07-12 10:38:40,133 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.726145038167939 [2022-07-12 10:38:40,133 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 761 transitions. [2022-07-12 10:38:40,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 761 transitions. [2022-07-12 10:38:40,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:40,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 761 transitions. [2022-07-12 10:38:40,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.125) internal successors, (761), 8 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,138 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 131.0) internal successors, (1179), 9 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,138 INFO L186 Difference]: Start difference. First operand has 127 places, 114 transitions, 323 flow. Second operand 8 states and 761 transitions. [2022-07-12 10:38:40,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 163 transitions, 682 flow [2022-07-12 10:38:40,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 163 transitions, 660 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-07-12 10:38:40,150 INFO L242 Difference]: Finished difference. Result has 130 places, 117 transitions, 357 flow [2022-07-12 10:38:40,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=130, PETRI_TRANSITIONS=117} [2022-07-12 10:38:40,153 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2022-07-12 10:38:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 117 transitions, 357 flow [2022-07-12 10:38:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,153 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:40,154 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, 1, 1, 1, 1] [2022-07-12 10:38:40,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:38:40,154 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)] === [2022-07-12 10:38:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1386724926, now seen corresponding path program 2 times [2022-07-12 10:38:40,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:40,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906565720] [2022-07-12 10:38:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:40,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:40,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:40,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906565720] [2022-07-12 10:38:40,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906565720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:40,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:40,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 10:38:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398177377] [2022-07-12 10:38:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:40,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:38:40,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:38:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:38:40,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-12 10:38:40,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 117 transitions, 357 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:40,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-12 10:38:40,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:40,866 INFO L129 PetriNetUnfolder]: 1914/3550 cut-off events. [2022-07-12 10:38:40,867 INFO L130 PetriNetUnfolder]: For 3151/3197 co-relation queries the response was YES. [2022-07-12 10:38:40,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8896 conditions, 3550 events. 1914/3550 cut-off events. For 3151/3197 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22689 event pairs, 721 based on Foata normal form. 32/3203 useless extension candidates. Maximal degree in co-relation 8884. Up to 1069 conditions per place. [2022-07-12 10:38:40,890 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 92 selfloop transitions, 12 changer transitions 10/182 dead transitions. [2022-07-12 10:38:40,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 824 flow [2022-07-12 10:38:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:38:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:38:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 946 transitions. [2022-07-12 10:38:40,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7221374045801526 [2022-07-12 10:38:40,893 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 946 transitions. [2022-07-12 10:38:40,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 946 transitions. [2022-07-12 10:38:40,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:40,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 946 transitions. [2022-07-12 10:38:40,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.6) internal successors, (946), 10 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,924 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,924 INFO L186 Difference]: Start difference. First operand has 130 places, 117 transitions, 357 flow. Second operand 10 states and 946 transitions. [2022-07-12 10:38:40,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 824 flow [2022-07-12 10:38:40,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 810 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:38:40,936 INFO L242 Difference]: Finished difference. Result has 136 places, 119 transitions, 390 flow [2022-07-12 10:38:40,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2022-07-12 10:38:40,939 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2022-07-12 10:38:40,939 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 390 flow [2022-07-12 10:38:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:40,939 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:40,940 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, 1, 1, 1, 1] [2022-07-12 10:38:40,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:38:40,940 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)] === [2022-07-12 10:38:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1632214562, now seen corresponding path program 3 times [2022-07-12 10:38:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:40,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256485059] [2022-07-12 10:38:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:41,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256485059] [2022-07-12 10:38:41,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256485059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:41,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:41,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 10:38:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44762753] [2022-07-12 10:38:41,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:41,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:38:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:41,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:38:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:38:41,097 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-12 10:38:41,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 390 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:41,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:41,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-12 10:38:41,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:41,535 INFO L129 PetriNetUnfolder]: 1433/2624 cut-off events. [2022-07-12 10:38:41,535 INFO L130 PetriNetUnfolder]: For 2756/2756 co-relation queries the response was YES. [2022-07-12 10:38:41,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7160 conditions, 2624 events. 1433/2624 cut-off events. For 2756/2756 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15541 event pairs, 314 based on Foata normal form. 72/2444 useless extension candidates. Maximal degree in co-relation 7146. Up to 1319 conditions per place. [2022-07-12 10:38:41,605 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 63 selfloop transitions, 11 changer transitions 9/151 dead transitions. [2022-07-12 10:38:41,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 151 transitions, 674 flow [2022-07-12 10:38:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:38:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:38:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 834 transitions. [2022-07-12 10:38:41,608 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7073791348600509 [2022-07-12 10:38:41,608 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 834 transitions. [2022-07-12 10:38:41,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 834 transitions. [2022-07-12 10:38:41,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:41,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 834 transitions. [2022-07-12 10:38:41,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.66666666666667) internal successors, (834), 9 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:41,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:41,611 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:41,611 INFO L186 Difference]: Start difference. First operand has 136 places, 119 transitions, 390 flow. Second operand 9 states and 834 transitions. [2022-07-12 10:38:41,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 151 transitions, 674 flow [2022-07-12 10:38:41,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 151 transitions, 653 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-07-12 10:38:41,615 INFO L242 Difference]: Finished difference. Result has 138 places, 116 transitions, 373 flow [2022-07-12 10:38:41,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=138, PETRI_TRANSITIONS=116} [2022-07-12 10:38:41,616 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2022-07-12 10:38:41,616 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 116 transitions, 373 flow [2022-07-12 10:38:41,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:41,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:41,617 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, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:41,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:38:41,617 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)] === [2022-07-12 10:38:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:41,617 INFO L85 PathProgramCache]: Analyzing trace with hash -381570272, now seen corresponding path program 1 times [2022-07-12 10:38:41,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:41,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801019752] [2022-07-12 10:38:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:41,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801019752] [2022-07-12 10:38:41,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801019752] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443316186] [2022-07-12 10:38:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:41,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:41,784 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) [2022-07-12 10:38:41,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:38:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:38:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:41,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:42,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443316186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:42,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:42,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-07-12 10:38:42,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975696143] [2022-07-12 10:38:42,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:42,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:38:42,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:38:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:38:42,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-07-12 10:38:42,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 116 transitions, 373 flow. Second operand has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:42,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:42,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-07-12 10:38:42,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:42,924 INFO L129 PetriNetUnfolder]: 4250/7066 cut-off events. [2022-07-12 10:38:42,924 INFO L130 PetriNetUnfolder]: For 8476/8523 co-relation queries the response was YES. [2022-07-12 10:38:42,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19721 conditions, 7066 events. 4250/7066 cut-off events. For 8476/8523 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47320 event pairs, 526 based on Foata normal form. 554/7022 useless extension candidates. Maximal degree in co-relation 19706. Up to 1749 conditions per place. [2022-07-12 10:38:42,971 INFO L132 encePairwiseOnDemand]: 115/131 looper letters, 145 selfloop transitions, 34 changer transitions 8/254 dead transitions. [2022-07-12 10:38:42,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 254 transitions, 1293 flow [2022-07-12 10:38:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 10:38:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-07-12 10:38:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1598 transitions. [2022-07-12 10:38:42,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7175572519083969 [2022-07-12 10:38:42,975 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1598 transitions. [2022-07-12 10:38:42,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1598 transitions. [2022-07-12 10:38:42,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:42,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1598 transitions. [2022-07-12 10:38:42,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.0) internal successors, (1598), 17 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:42,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 131.0) internal successors, (2358), 18 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:42,982 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 131.0) internal successors, (2358), 18 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:42,982 INFO L186 Difference]: Start difference. First operand has 138 places, 116 transitions, 373 flow. Second operand 17 states and 1598 transitions. [2022-07-12 10:38:42,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 254 transitions, 1293 flow [2022-07-12 10:38:42,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 254 transitions, 1217 flow, removed 15 selfloop flow, removed 11 redundant places. [2022-07-12 10:38:42,992 INFO L242 Difference]: Finished difference. Result has 150 places, 139 transitions, 628 flow [2022-07-12 10:38:42,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=628, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2022-07-12 10:38:42,994 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 33 predicate places. [2022-07-12 10:38:42,995 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 628 flow [2022-07-12 10:38:42,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.66666666666667) internal successors, (1315), 15 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:42,995 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:42,996 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:43,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:38:43,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:43,215 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)] === [2022-07-12 10:38:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1954215548, now seen corresponding path program 1 times [2022-07-12 10:38:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:43,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623969106] [2022-07-12 10:38:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:43,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:43,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:43,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623969106] [2022-07-12 10:38:43,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623969106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285535054] [2022-07-12 10:38:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:43,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:43,340 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) [2022-07-12 10:38:43,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:38:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:38:43,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:43,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:38:43,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285535054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:43,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:38:43,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-12 10:38:43,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292358606] [2022-07-12 10:38:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:43,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:38:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:38:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:38:43,753 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-12 10:38:43,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:43,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:43,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-12 10:38:43,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:44,197 INFO L129 PetriNetUnfolder]: 1788/3775 cut-off events. [2022-07-12 10:38:44,197 INFO L130 PetriNetUnfolder]: For 13246/13426 co-relation queries the response was YES. [2022-07-12 10:38:44,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13082 conditions, 3775 events. 1788/3775 cut-off events. For 13246/13426 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28604 event pairs, 233 based on Foata normal form. 7/3446 useless extension candidates. Maximal degree in co-relation 13060. Up to 1351 conditions per place. [2022-07-12 10:38:44,230 INFO L132 encePairwiseOnDemand]: 121/131 looper letters, 108 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2022-07-12 10:38:44,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 1358 flow [2022-07-12 10:38:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:38:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:38:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 883 transitions. [2022-07-12 10:38:44,233 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7489397794741306 [2022-07-12 10:38:44,233 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 883 transitions. [2022-07-12 10:38:44,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 883 transitions. [2022-07-12 10:38:44,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:44,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 883 transitions. [2022-07-12 10:38:44,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.11111111111111) internal successors, (883), 9 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,237 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 131.0) internal successors, (1310), 10 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,237 INFO L186 Difference]: Start difference. First operand has 150 places, 139 transitions, 628 flow. Second operand 9 states and 883 transitions. [2022-07-12 10:38:44,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 1358 flow [2022-07-12 10:38:44,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 202 transitions, 1188 flow, removed 66 selfloop flow, removed 11 redundant places. [2022-07-12 10:38:44,252 INFO L242 Difference]: Finished difference. Result has 147 places, 149 transitions, 670 flow [2022-07-12 10:38:44,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=147, PETRI_TRANSITIONS=149} [2022-07-12 10:38:44,253 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 30 predicate places. [2022-07-12 10:38:44,253 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 149 transitions, 670 flow [2022-07-12 10:38:44,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,253 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:44,253 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:44,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:44,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:44,464 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)] === [2022-07-12 10:38:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2147113502, now seen corresponding path program 2 times [2022-07-12 10:38:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:44,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836859610] [2022-07-12 10:38:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:44,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:38:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836859610] [2022-07-12 10:38:44,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836859610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861230293] [2022-07-12 10:38:44,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:44,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:44,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:44,694 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) [2022-07-12 10:38:44,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:38:44,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:44,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:38:44,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:38:45,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:38:45,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861230293] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:45,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:38:45,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 22 [2022-07-12 10:38:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096750460] [2022-07-12 10:38:45,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:38:45,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:38:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-07-12 10:38:45,117 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 131 [2022-07-12 10:38:45,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 149 transitions, 670 flow. Second operand has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:45,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:45,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 131 [2022-07-12 10:38:45,118 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:45,666 INFO L129 PetriNetUnfolder]: 2488/5379 cut-off events. [2022-07-12 10:38:45,666 INFO L130 PetriNetUnfolder]: For 21866/22027 co-relation queries the response was YES. [2022-07-12 10:38:45,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 5379 events. 2488/5379 cut-off events. For 21866/22027 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42815 event pairs, 354 based on Foata normal form. 26/5220 useless extension candidates. Maximal degree in co-relation 19279. Up to 1207 conditions per place. [2022-07-12 10:38:45,718 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 156 selfloop transitions, 24 changer transitions 0/258 dead transitions. [2022-07-12 10:38:45,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 1780 flow [2022-07-12 10:38:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:38:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:38:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 994 transitions. [2022-07-12 10:38:45,721 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587786259541984 [2022-07-12 10:38:45,721 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 994 transitions. [2022-07-12 10:38:45,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 994 transitions. [2022-07-12 10:38:45,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:45,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 994 transitions. [2022-07-12 10:38:45,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:45,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:45,725 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:45,725 INFO L186 Difference]: Start difference. First operand has 147 places, 149 transitions, 670 flow. Second operand 10 states and 994 transitions. [2022-07-12 10:38:45,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 1780 flow [2022-07-12 10:38:45,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 258 transitions, 1767 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:45,741 INFO L242 Difference]: Finished difference. Result has 155 places, 156 transitions, 779 flow [2022-07-12 10:38:45,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=155, PETRI_TRANSITIONS=156} [2022-07-12 10:38:45,741 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 38 predicate places. [2022-07-12 10:38:45,742 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 156 transitions, 779 flow [2022-07-12 10:38:45,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:45,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:45,742 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:45,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:38:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:38:45,959 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)] === [2022-07-12 10:38:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash -562275662, now seen corresponding path program 3 times [2022-07-12 10:38:45,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:45,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617071575] [2022-07-12 10:38:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:45,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:46,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617071575] [2022-07-12 10:38:46,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617071575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:46,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:46,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 10:38:46,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386536029] [2022-07-12 10:38:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:46,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:38:46,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:38:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-12 10:38:46,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-12 10:38:46,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 156 transitions, 779 flow. Second operand has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:46,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:46,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-12 10:38:46,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:47,250 INFO L129 PetriNetUnfolder]: 6731/11642 cut-off events. [2022-07-12 10:38:47,250 INFO L130 PetriNetUnfolder]: For 39293/39293 co-relation queries the response was YES. [2022-07-12 10:38:47,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43407 conditions, 11642 events. 6731/11642 cut-off events. For 39293/39293 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 86834 event pairs, 2836 based on Foata normal form. 43/11558 useless extension candidates. Maximal degree in co-relation 43383. Up to 7480 conditions per place. [2022-07-12 10:38:47,346 INFO L132 encePairwiseOnDemand]: 120/131 looper letters, 103 selfloop transitions, 18 changer transitions 15/204 dead transitions. [2022-07-12 10:38:47,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 204 transitions, 1467 flow [2022-07-12 10:38:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:38:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:38:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 910 transitions. [2022-07-12 10:38:47,348 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6946564885496184 [2022-07-12 10:38:47,349 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 910 transitions. [2022-07-12 10:38:47,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 910 transitions. [2022-07-12 10:38:47,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:47,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 910 transitions. [2022-07-12 10:38:47,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.0) internal successors, (910), 10 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,353 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,353 INFO L186 Difference]: Start difference. First operand has 155 places, 156 transitions, 779 flow. Second operand 10 states and 910 transitions. [2022-07-12 10:38:47,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 204 transitions, 1467 flow [2022-07-12 10:38:47,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 204 transitions, 1435 flow, removed 7 selfloop flow, removed 6 redundant places. [2022-07-12 10:38:47,409 INFO L242 Difference]: Finished difference. Result has 159 places, 159 transitions, 859 flow [2022-07-12 10:38:47,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=859, PETRI_PLACES=159, PETRI_TRANSITIONS=159} [2022-07-12 10:38:47,409 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 42 predicate places. [2022-07-12 10:38:47,409 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 159 transitions, 859 flow [2022-07-12 10:38:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 88.0) internal successors, (792), 9 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:47,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:47,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:38:47,410 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:38:47,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:47,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1797479770, now seen corresponding path program 1 times [2022-07-12 10:38:47,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:47,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129237621] [2022-07-12 10:38:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:47,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:47,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129237621] [2022-07-12 10:38:47,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129237621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110594749] [2022-07-12 10:38:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:47,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:47,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:47,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:47,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:38:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:38:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:47,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:47,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110594749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:47,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:47,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-07-12 10:38:47,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648192823] [2022-07-12 10:38:47,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:47,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:38:47,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:38:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:38:47,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 131 [2022-07-12 10:38:47,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 159 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:47,834 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 131 [2022-07-12 10:38:47,834 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:48,399 INFO L129 PetriNetUnfolder]: 1565/4801 cut-off events. [2022-07-12 10:38:48,399 INFO L130 PetriNetUnfolder]: For 31934/32370 co-relation queries the response was YES. [2022-07-12 10:38:48,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17842 conditions, 4801 events. 1565/4801 cut-off events. For 31934/32370 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46180 event pairs, 216 based on Foata normal form. 174/4821 useless extension candidates. Maximal degree in co-relation 17817. Up to 1194 conditions per place. [2022-07-12 10:38:48,439 INFO L132 encePairwiseOnDemand]: 123/131 looper letters, 59 selfloop transitions, 67 changer transitions 4/226 dead transitions. [2022-07-12 10:38:48,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 226 transitions, 1637 flow [2022-07-12 10:38:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:38:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:38:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-07-12 10:38:48,441 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8429661941112323 [2022-07-12 10:38:48,441 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-07-12 10:38:48,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-07-12 10:38:48,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:48,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-07-12 10:38:48,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:48,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:48,444 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:48,444 INFO L186 Difference]: Start difference. First operand has 159 places, 159 transitions, 859 flow. Second operand 7 states and 773 transitions. [2022-07-12 10:38:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 226 transitions, 1637 flow [2022-07-12 10:38:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 1607 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-12 10:38:48,459 INFO L242 Difference]: Finished difference. Result has 161 places, 194 transitions, 1493 flow [2022-07-12 10:38:48,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1493, PETRI_PLACES=161, PETRI_TRANSITIONS=194} [2022-07-12 10:38:48,460 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 44 predicate places. [2022-07-12 10:38:48,460 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 194 transitions, 1493 flow [2022-07-12 10:38:48,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:48,460 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:48,461 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:48,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:48,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:48,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:38:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1189485944, now seen corresponding path program 2 times [2022-07-12 10:38:48,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:48,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223449145] [2022-07-12 10:38:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:48,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:48,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223449145] [2022-07-12 10:38:48,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223449145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:48,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626179598] [2022-07-12 10:38:48,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:48,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:48,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:48,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:38:48,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:38:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:49,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626179598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:49,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:49,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-12 10:38:49,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273908143] [2022-07-12 10:38:49,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:49,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:38:49,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:38:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:38:49,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 131 [2022-07-12 10:38:49,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 194 transitions, 1493 flow. Second operand has 24 states, 24 states have (on average 87.83333333333333) internal successors, (2108), 24 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:49,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:49,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 131 [2022-07-12 10:38:49,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:57,453 INFO L129 PetriNetUnfolder]: 40001/70006 cut-off events. [2022-07-12 10:38:57,454 INFO L130 PetriNetUnfolder]: For 398299/398495 co-relation queries the response was YES. [2022-07-12 10:38:57,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 285840 conditions, 70006 events. 40001/70006 cut-off events. For 398299/398495 co-relation queries the response was YES. Maximal size of possible extension queue 4215. Compared 693294 event pairs, 7304 based on Foata normal form. 3125/72302 useless extension candidates. Maximal degree in co-relation 285812. Up to 11334 conditions per place. [2022-07-12 10:38:58,149 INFO L132 encePairwiseOnDemand]: 118/131 looper letters, 642 selfloop transitions, 150 changer transitions 0/860 dead transitions. [2022-07-12 10:38:58,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 860 transitions, 10217 flow [2022-07-12 10:38:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 10:38:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-12 10:38:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2303 transitions. [2022-07-12 10:38:58,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7325063613231552 [2022-07-12 10:38:58,173 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2303 transitions. [2022-07-12 10:38:58,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2303 transitions. [2022-07-12 10:38:58,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:58,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2303 transitions. [2022-07-12 10:38:58,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 95.95833333333333) internal successors, (2303), 24 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:58,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:58,194 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 131.0) internal successors, (3275), 25 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:58,194 INFO L186 Difference]: Start difference. First operand has 161 places, 194 transitions, 1493 flow. Second operand 24 states and 2303 transitions. [2022-07-12 10:38:58,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 860 transitions, 10217 flow [2022-07-12 10:38:59,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 860 transitions, 9232 flow, removed 481 selfloop flow, removed 3 redundant places. [2022-07-12 10:38:59,101 INFO L242 Difference]: Finished difference. Result has 194 places, 308 transitions, 3242 flow [2022-07-12 10:38:59,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=131, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3242, PETRI_PLACES=194, PETRI_TRANSITIONS=308} [2022-07-12 10:38:59,102 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 77 predicate places. [2022-07-12 10:38:59,102 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 308 transitions, 3242 flow [2022-07-12 10:38:59,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.83333333333333) internal successors, (2108), 24 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:59,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:59,103 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:59,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:59,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:59,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-12 10:38:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1361124138, now seen corresponding path program 3 times [2022-07-12 10:38:59,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212768643] [2022-07-12 10:38:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:59,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212768643] [2022-07-12 10:38:59,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212768643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915415025] [2022-07-12 10:38:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:38:59,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:59,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:59,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:38:59,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:38:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:38:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:38:59,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:39:00,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915415025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:00,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-07-12 10:39:00,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348262898] [2022-07-12 10:39:00,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:39:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:39:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:39:00,087 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 131 [2022-07-12 10:39:00,088 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 308 transitions, 3242 flow. Second operand has 24 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:00,088 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:00,088 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 131 [2022-07-12 10:39:00,088 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand