./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:45:10,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:45:10,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:45:10,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:45:10,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:45:10,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:45:10,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:45:10,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:45:10,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:45:10,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:45:10,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:45:10,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:45:10,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:45:10,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:45:10,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:45:10,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:45:10,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:45:10,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:45:10,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:45:10,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:45:10,176 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:45:10,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:45:10,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:45:10,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:45:10,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:45:10,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:45:10,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:45:10,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:45:10,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:45:10,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:45:10,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:45:10,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:45:10,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:45:10,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:45:10,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:45:10,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:45:10,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:45:10,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:45:10,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:45:10,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:45:10,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:45:10,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:45:10,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:45:10,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:45:10,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:45:10,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:45:10,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:45:10,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:45:10,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:45:10,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:45:10,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:45:10,207 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:45:10,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:45:10,207 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:45:10,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:45:10,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:45:10,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:45:10,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:45:10,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:45:10,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:45:10,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:45:10,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:45:10,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:45:10,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:45:10,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-07-19 21:45:10,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:45:10,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:45:10,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:45:10,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:45:10,402 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:45:10,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-07-19 21:45:10,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176841264/dc4c936bbbb94572bf4502ef95517a71/FLAGe83dfbb00 [2022-07-19 21:45:10,804 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:45:10,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-07-19 21:45:10,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176841264/dc4c936bbbb94572bf4502ef95517a71/FLAGe83dfbb00 [2022-07-19 21:45:11,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/176841264/dc4c936bbbb94572bf4502ef95517a71 [2022-07-19 21:45:11,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:45:11,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:45:11,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:45:11,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:45:11,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:45:11,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47bf5deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11, skipping insertion in model container [2022-07-19 21:45:11,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:45:11,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:45:11,426 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/unroll-3.wvr.c[2500,2513] [2022-07-19 21:45:11,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:45:11,441 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:45:11,455 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/unroll-3.wvr.c[2500,2513] [2022-07-19 21:45:11,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:45:11,469 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:45:11,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11 WrapperNode [2022-07-19 21:45:11,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:45:11,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:45:11,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:45:11,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:45:11,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,498 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-07-19 21:45:11,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:45:11,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:45:11,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:45:11,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:45:11,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:45:11,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:45:11,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:45:11,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:45:11,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (1/1) ... [2022-07-19 21:45:11,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:45:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:11,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:45:11,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:45:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:45:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:45:11,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:45:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:45:11,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:45:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:45:11,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:45:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:45:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:45:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:45:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:45:11,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:45:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:45:11,589 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:45:11,646 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:45:11,647 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:45:11,905 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:45:11,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:45:11,913 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:45:11,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:11 BoogieIcfgContainer [2022-07-19 21:45:11,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:45:11,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:45:11,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:45:11,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:45:11,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:45:11" (1/3) ... [2022-07-19 21:45:11,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a145fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:11, skipping insertion in model container [2022-07-19 21:45:11,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:11" (2/3) ... [2022-07-19 21:45:11,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a145fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:11, skipping insertion in model container [2022-07-19 21:45:11,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:11" (3/3) ... [2022-07-19 21:45:11,921 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-07-19 21:45:11,925 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:45:11,933 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:45:11,933 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:45:11,933 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:45:11,991 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:45:12,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2022-07-19 21:45:12,057 INFO L129 PetriNetUnfolder]: 15/183 cut-off events. [2022-07-19 21:45:12,057 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:45:12,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 176 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-19 21:45:12,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2022-07-19 21:45:12,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2022-07-19 21:45:12,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:45:12,076 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@50d29c56, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5efe6c33 [2022-07-19 21:45:12,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:45:12,099 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-19 21:45:12,100 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:45:12,100 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:12,101 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:12,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1353629831, now seen corresponding path program 1 times [2022-07-19 21:45:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639542236] [2022-07-19 21:45:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:12,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:12,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639542236] [2022-07-19 21:45:12,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639542236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:12,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:12,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:45:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054530465] [2022-07-19 21:45:12,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:12,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:45:12,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:45:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:45:12,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 185 [2022-07-19 21:45:12,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 174 transitions, 360 flow. Second operand 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) [2022-07-19 21:45:12,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:12,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 185 [2022-07-19 21:45:12,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:12,630 INFO L129 PetriNetUnfolder]: 20/296 cut-off events. [2022-07-19 21:45:12,632 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-19 21:45:12,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 296 events. 20/296 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 694 event pairs, 7 based on Foata normal form. 32/301 useless extension candidates. Maximal degree in co-relation 216. Up to 60 conditions per place. [2022-07-19 21:45:12,635 INFO L132 encePairwiseOnDemand]: 165/185 looper letters, 37 selfloop transitions, 7 changer transitions 5/166 dead transitions. [2022-07-19 21:45:12,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 166 transitions, 442 flow [2022-07-19 21:45:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:45:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:45:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1079 transitions. [2022-07-19 21:45:12,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7290540540540541 [2022-07-19 21:45:12,652 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1079 transitions. [2022-07-19 21:45:12,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1079 transitions. [2022-07-19 21:45:12,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:12,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1079 transitions. [2022-07-19 21:45:12,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.875) internal successors, (1079), 8 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,669 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,671 INFO L186 Difference]: Start difference. First operand has 166 places, 174 transitions, 360 flow. Second operand 8 states and 1079 transitions. [2022-07-19 21:45:12,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 166 transitions, 442 flow [2022-07-19 21:45:12,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 166 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:45:12,677 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 340 flow [2022-07-19 21:45:12,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=170, PETRI_TRANSITIONS=158} [2022-07-19 21:45:12,682 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 4 predicate places. [2022-07-19 21:45:12,682 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 340 flow [2022-07-19 21:45:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-19 21:45:12,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:12,683 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] [2022-07-19 21:45:12,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:45:12,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 379398891, now seen corresponding path program 1 times [2022-07-19 21:45:12,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:12,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099633109] [2022-07-19 21:45:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:12,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:12,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:12,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099633109] [2022-07-19 21:45:12,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099633109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:12,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:12,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:45:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281242513] [2022-07-19 21:45:12,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:12,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:45:12,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:45:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:45:12,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 185 [2022-07-19 21:45:12,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 158 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:12,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 185 [2022-07-19 21:45:12,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:12,967 INFO L129 PetriNetUnfolder]: 97/658 cut-off events. [2022-07-19 21:45:12,967 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 21:45:12,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 658 events. 97/658 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3417 event pairs, 29 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 818. Up to 106 conditions per place. [2022-07-19 21:45:12,973 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 59 selfloop transitions, 5 changer transitions 4/188 dead transitions. [2022-07-19 21:45:12,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 188 transitions, 541 flow [2022-07-19 21:45:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:45:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:45:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 843 transitions. [2022-07-19 21:45:12,975 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7594594594594595 [2022-07-19 21:45:12,975 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 843 transitions. [2022-07-19 21:45:12,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 843 transitions. [2022-07-19 21:45:12,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:12,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 843 transitions. [2022-07-19 21:45:12,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.5) internal successors, (843), 6 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,980 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,980 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 340 flow. Second operand 6 states and 843 transitions. [2022-07-19 21:45:12,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 188 transitions, 541 flow [2022-07-19 21:45:12,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 188 transitions, 529 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:45:12,988 INFO L242 Difference]: Finished difference. Result has 167 places, 161 transitions, 357 flow [2022-07-19 21:45:12,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=167, PETRI_TRANSITIONS=161} [2022-07-19 21:45:12,990 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 1 predicate places. [2022-07-19 21:45:12,991 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 357 flow [2022-07-19 21:45:12,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 133.33333333333334) internal successors, (800), 6 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:12,992 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:12,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:12,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:45:12,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:12,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1977040316, now seen corresponding path program 1 times [2022-07-19 21:45:12,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:12,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443582609] [2022-07-19 21:45:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:12,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443582609] [2022-07-19 21:45:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443582609] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942506934] [2022-07-19 21:45:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:13,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:13,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:13,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:45:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:45:13,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:13,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:13,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942506934] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:13,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:45:13,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-19 21:45:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113149734] [2022-07-19 21:45:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:13,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:45:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:45:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:45:13,541 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-07-19 21:45:13,543 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 161 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:13,543 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:13,543 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-07-19 21:45:13,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:13,640 INFO L129 PetriNetUnfolder]: 97/704 cut-off events. [2022-07-19 21:45:13,640 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:45:13,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 704 events. 97/704 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3575 event pairs, 8 based on Foata normal form. 0/621 useless extension candidates. Maximal degree in co-relation 924. Up to 111 conditions per place. [2022-07-19 21:45:13,643 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 24 selfloop transitions, 5 changer transitions 1/173 dead transitions. [2022-07-19 21:45:13,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 445 flow [2022-07-19 21:45:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:45:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:45:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2022-07-19 21:45:13,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8743243243243243 [2022-07-19 21:45:13,646 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2022-07-19 21:45:13,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2022-07-19 21:45:13,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:13,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2022-07-19 21:45:13,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:13,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:13,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 185.0) internal successors, (925), 5 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:13,650 INFO L186 Difference]: Start difference. First operand has 167 places, 161 transitions, 357 flow. Second operand 4 states and 647 transitions. [2022-07-19 21:45:13,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 445 flow [2022-07-19 21:45:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 173 transitions, 441 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:45:13,654 INFO L242 Difference]: Finished difference. Result has 169 places, 165 transitions, 389 flow [2022-07-19 21:45:13,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=169, PETRI_TRANSITIONS=165} [2022-07-19 21:45:13,655 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 3 predicate places. [2022-07-19 21:45:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 165 transitions, 389 flow [2022-07-19 21:45:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:13,655 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:13,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:13,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:45:13,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:13,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash -43481260, now seen corresponding path program 2 times [2022-07-19 21:45:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:13,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142324532] [2022-07-19 21:45:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:13,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142324532] [2022-07-19 21:45:13,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142324532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:13,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:13,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:45:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972061695] [2022-07-19 21:45:13,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:13,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:45:13,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:13,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:45:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:45:13,972 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-07-19 21:45:13,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 165 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:13,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:13,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-07-19 21:45:13,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:14,080 INFO L129 PetriNetUnfolder]: 112/800 cut-off events. [2022-07-19 21:45:14,082 INFO L130 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2022-07-19 21:45:14,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 800 events. 112/800 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4108 event pairs, 26 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 1129. Up to 157 conditions per place. [2022-07-19 21:45:14,086 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 27 selfloop transitions, 6 changer transitions 0/176 dead transitions. [2022-07-19 21:45:14,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 176 transitions, 496 flow [2022-07-19 21:45:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:45:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:45:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2022-07-19 21:45:14,089 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8637837837837837 [2022-07-19 21:45:14,089 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2022-07-19 21:45:14,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2022-07-19 21:45:14,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:14,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2022-07-19 21:45:14,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,096 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,096 INFO L186 Difference]: Start difference. First operand has 169 places, 165 transitions, 389 flow. Second operand 5 states and 799 transitions. [2022-07-19 21:45:14,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 176 transitions, 496 flow [2022-07-19 21:45:14,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 176 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:45:14,100 INFO L242 Difference]: Finished difference. Result has 175 places, 167 transitions, 424 flow [2022-07-19 21:45:14,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=175, PETRI_TRANSITIONS=167} [2022-07-19 21:45:14,102 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 9 predicate places. [2022-07-19 21:45:14,102 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 167 transitions, 424 flow [2022-07-19 21:45:14,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,102 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:14,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:14,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:45:14,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1970492588, now seen corresponding path program 3 times [2022-07-19 21:45:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077314589] [2022-07-19 21:45:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:14,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077314589] [2022-07-19 21:45:14,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077314589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744415104] [2022-07-19 21:45:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:45:14,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:14,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:14,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:45:14,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:45:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:45:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:14,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:14,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744415104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:14,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:14,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-19 21:45:14,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91992454] [2022-07-19 21:45:14,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:14,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:45:14,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:45:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-19 21:45:14,532 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-19 21:45:14,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 167 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:14,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-19 21:45:14,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:14,667 INFO L129 PetriNetUnfolder]: 195/1309 cut-off events. [2022-07-19 21:45:14,667 INFO L130 PetriNetUnfolder]: For 621/621 co-relation queries the response was YES. [2022-07-19 21:45:14,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 1309 events. 195/1309 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 8491 event pairs, 59 based on Foata normal form. 13/1244 useless extension candidates. Maximal degree in co-relation 2122. Up to 308 conditions per place. [2022-07-19 21:45:14,674 INFO L132 encePairwiseOnDemand]: 175/185 looper letters, 39 selfloop transitions, 23 changer transitions 3/205 dead transitions. [2022-07-19 21:45:14,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 205 transitions, 719 flow [2022-07-19 21:45:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:45:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:45:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1117 transitions. [2022-07-19 21:45:14,676 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625482625482626 [2022-07-19 21:45:14,677 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1117 transitions. [2022-07-19 21:45:14,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1117 transitions. [2022-07-19 21:45:14,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:14,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1117 transitions. [2022-07-19 21:45:14,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.57142857142858) internal successors, (1117), 7 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,681 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,681 INFO L186 Difference]: Start difference. First operand has 175 places, 167 transitions, 424 flow. Second operand 7 states and 1117 transitions. [2022-07-19 21:45:14,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 205 transitions, 719 flow [2022-07-19 21:45:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 205 transitions, 709 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:45:14,685 INFO L242 Difference]: Finished difference. Result has 184 places, 189 transitions, 638 flow [2022-07-19 21:45:14,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=184, PETRI_TRANSITIONS=189} [2022-07-19 21:45:14,686 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 18 predicate places. [2022-07-19 21:45:14,686 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 189 transitions, 638 flow [2022-07-19 21:45:14,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 153.66666666666666) internal successors, (1383), 9 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:14,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:14,687 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:14,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:45:14,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:14,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:14,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1202560105, now seen corresponding path program 4 times [2022-07-19 21:45:14,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:14,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112517150] [2022-07-19 21:45:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:14,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112517150] [2022-07-19 21:45:15,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112517150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694649616] [2022-07-19 21:45:15,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:45:15,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:15,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:15,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:15,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:45:15,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:45:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 21:45:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:15,854 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-19 21:45:15,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-19 21:45:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:15,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:16,131 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:45:16,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-19 21:45:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:17,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694649616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:17,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:17,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 23, 19] total 40 [2022-07-19 21:45:17,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310701850] [2022-07-19 21:45:17,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 21:45:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 21:45:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 21:45:17,100 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-07-19 21:45:17,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 189 transitions, 638 flow. Second operand has 40 states, 40 states have (on average 85.5) internal successors, (3420), 40 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:17,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:17,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-07-19 21:45:17,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:21,951 INFO L129 PetriNetUnfolder]: 7154/16363 cut-off events. [2022-07-19 21:45:21,951 INFO L130 PetriNetUnfolder]: For 17192/17192 co-relation queries the response was YES. [2022-07-19 21:45:22,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39576 conditions, 16363 events. 7154/16363 cut-off events. For 17192/17192 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 154570 event pairs, 815 based on Foata normal form. 79/15583 useless extension candidates. Maximal degree in co-relation 34790. Up to 2695 conditions per place. [2022-07-19 21:45:22,176 INFO L132 encePairwiseOnDemand]: 143/185 looper letters, 562 selfloop transitions, 143 changer transitions 162/937 dead transitions. [2022-07-19 21:45:22,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 937 transitions, 5723 flow [2022-07-19 21:45:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-19 21:45:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-19 21:45:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6583 transitions. [2022-07-19 21:45:22,205 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.487449092928545 [2022-07-19 21:45:22,205 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6583 transitions. [2022-07-19 21:45:22,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6583 transitions. [2022-07-19 21:45:22,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:22,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6583 transitions. [2022-07-19 21:45:22,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 90.17808219178082) internal successors, (6583), 73 states have internal predecessors, (6583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:22,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 185.0) internal successors, (13690), 74 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:22,250 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 185.0) internal successors, (13690), 74 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:22,250 INFO L186 Difference]: Start difference. First operand has 184 places, 189 transitions, 638 flow. Second operand 73 states and 6583 transitions. [2022-07-19 21:45:22,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 937 transitions, 5723 flow [2022-07-19 21:45:22,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 937 transitions, 5639 flow, removed 42 selfloop flow, removed 0 redundant places. [2022-07-19 21:45:22,302 INFO L242 Difference]: Finished difference. Result has 312 places, 325 transitions, 2035 flow [2022-07-19 21:45:22,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=2035, PETRI_PLACES=312, PETRI_TRANSITIONS=325} [2022-07-19 21:45:22,305 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 146 predicate places. [2022-07-19 21:45:22,305 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 325 transitions, 2035 flow [2022-07-19 21:45:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 85.5) internal successors, (3420), 40 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:22,306 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:22,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:22,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:45:22,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:22,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:22,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1833230058, now seen corresponding path program 1 times [2022-07-19 21:45:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:22,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598339723] [2022-07-19 21:45:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:22,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:22,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598339723] [2022-07-19 21:45:22,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598339723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:22,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:22,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:45:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28197836] [2022-07-19 21:45:22,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:45:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:45:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:45:22,581 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2022-07-19 21:45:22,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 325 transitions, 2035 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:22,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:22,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2022-07-19 21:45:22,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:23,073 INFO L129 PetriNetUnfolder]: 467/2997 cut-off events. [2022-07-19 21:45:23,074 INFO L130 PetriNetUnfolder]: For 16207/16334 co-relation queries the response was YES. [2022-07-19 21:45:23,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 2997 events. 467/2997 cut-off events. For 16207/16334 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 26621 event pairs, 84 based on Foata normal form. 70/2921 useless extension candidates. Maximal degree in co-relation 9296. Up to 547 conditions per place. [2022-07-19 21:45:23,102 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 51 selfloop transitions, 19 changer transitions 5/337 dead transitions. [2022-07-19 21:45:23,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 337 transitions, 2282 flow [2022-07-19 21:45:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:45:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:45:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2022-07-19 21:45:23,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8821621621621621 [2022-07-19 21:45:23,104 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2022-07-19 21:45:23,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2022-07-19 21:45:23,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:23,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2022-07-19 21:45:23,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,107 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 185.0) internal successors, (1110), 6 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,107 INFO L186 Difference]: Start difference. First operand has 312 places, 325 transitions, 2035 flow. Second operand 5 states and 816 transitions. [2022-07-19 21:45:23,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 337 transitions, 2282 flow [2022-07-19 21:45:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 337 transitions, 2136 flow, removed 50 selfloop flow, removed 20 redundant places. [2022-07-19 21:45:23,148 INFO L242 Difference]: Finished difference. Result has 282 places, 321 transitions, 1920 flow [2022-07-19 21:45:23,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1920, PETRI_PLACES=282, PETRI_TRANSITIONS=321} [2022-07-19 21:45:23,149 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 116 predicate places. [2022-07-19 21:45:23,149 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 321 transitions, 1920 flow [2022-07-19 21:45:23,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:23,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:23,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:45:23,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 401386038, now seen corresponding path program 2 times [2022-07-19 21:45:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:23,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917473173] [2022-07-19 21:45:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917473173] [2022-07-19 21:45:23,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917473173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:23,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:23,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:45:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182611703] [2022-07-19 21:45:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:45:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:45:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:45:23,256 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-19 21:45:23,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 321 transitions, 1920 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:23,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-19 21:45:23,257 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:23,832 INFO L129 PetriNetUnfolder]: 646/3445 cut-off events. [2022-07-19 21:45:23,833 INFO L130 PetriNetUnfolder]: For 16941/17079 co-relation queries the response was YES. [2022-07-19 21:45:23,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10826 conditions, 3445 events. 646/3445 cut-off events. For 16941/17079 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 30034 event pairs, 176 based on Foata normal form. 53/3341 useless extension candidates. Maximal degree in co-relation 9266. Up to 853 conditions per place. [2022-07-19 21:45:23,866 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 84 selfloop transitions, 40 changer transitions 4/357 dead transitions. [2022-07-19 21:45:23,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 357 transitions, 2411 flow [2022-07-19 21:45:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:45:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:45:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2022-07-19 21:45:23,868 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8702702702702703 [2022-07-19 21:45:23,868 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2022-07-19 21:45:23,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2022-07-19 21:45:23,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:23,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2022-07-19 21:45:23,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,872 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,872 INFO L186 Difference]: Start difference. First operand has 282 places, 321 transitions, 1920 flow. Second operand 6 states and 966 transitions. [2022-07-19 21:45:23,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 357 transitions, 2411 flow [2022-07-19 21:45:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 357 transitions, 2387 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-19 21:45:23,918 INFO L242 Difference]: Finished difference. Result has 287 places, 324 transitions, 2042 flow [2022-07-19 21:45:23,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2042, PETRI_PLACES=287, PETRI_TRANSITIONS=324} [2022-07-19 21:45:23,919 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 121 predicate places. [2022-07-19 21:45:23,919 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 324 transitions, 2042 flow [2022-07-19 21:45:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:23,920 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:23,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:45:23,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1349633416, now seen corresponding path program 3 times [2022-07-19 21:45:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:23,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851240038] [2022-07-19 21:45:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:24,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851240038] [2022-07-19 21:45:24,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851240038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:24,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:24,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:45:24,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874101650] [2022-07-19 21:45:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:24,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:45:24,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:45:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:45:24,003 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-19 21:45:24,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 324 transitions, 2042 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:24,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:24,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-19 21:45:24,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:24,764 INFO L129 PetriNetUnfolder]: 692/3805 cut-off events. [2022-07-19 21:45:24,765 INFO L130 PetriNetUnfolder]: For 17484/17617 co-relation queries the response was YES. [2022-07-19 21:45:24,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11489 conditions, 3805 events. 692/3805 cut-off events. For 17484/17617 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 34236 event pairs, 142 based on Foata normal form. 98/3735 useless extension candidates. Maximal degree in co-relation 10676. Up to 529 conditions per place. [2022-07-19 21:45:24,800 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 74 selfloop transitions, 53 changer transitions 2/358 dead transitions. [2022-07-19 21:45:24,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 358 transitions, 2597 flow [2022-07-19 21:45:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:45:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:45:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 963 transitions. [2022-07-19 21:45:24,802 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8675675675675676 [2022-07-19 21:45:24,803 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 963 transitions. [2022-07-19 21:45:24,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 963 transitions. [2022-07-19 21:45:24,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:24,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 963 transitions. [2022-07-19 21:45:24,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.5) internal successors, (963), 6 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:24,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:24,806 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 185.0) internal successors, (1295), 7 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:24,806 INFO L186 Difference]: Start difference. First operand has 287 places, 324 transitions, 2042 flow. Second operand 6 states and 963 transitions. [2022-07-19 21:45:24,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 358 transitions, 2597 flow [2022-07-19 21:45:24,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 358 transitions, 2536 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-07-19 21:45:24,855 INFO L242 Difference]: Finished difference. Result has 293 places, 330 transitions, 2203 flow [2022-07-19 21:45:24,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2203, PETRI_PLACES=293, PETRI_TRANSITIONS=330} [2022-07-19 21:45:24,856 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 127 predicate places. [2022-07-19 21:45:24,856 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 330 transitions, 2203 flow [2022-07-19 21:45:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:24,857 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:24,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:24,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:45:24,857 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1439286922, now seen corresponding path program 4 times [2022-07-19 21:45:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428466275] [2022-07-19 21:45:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:24,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:24,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:24,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428466275] [2022-07-19 21:45:24,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428466275] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:24,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:24,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:45:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933239049] [2022-07-19 21:45:24,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:24,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:45:24,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:45:24,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:45:24,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-19 21:45:24,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 330 transitions, 2203 flow. Second operand has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:24,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:24,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-19 21:45:24,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:25,599 INFO L129 PetriNetUnfolder]: 701/3822 cut-off events. [2022-07-19 21:45:25,600 INFO L130 PetriNetUnfolder]: For 15122/15188 co-relation queries the response was YES. [2022-07-19 21:45:25,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11959 conditions, 3822 events. 701/3822 cut-off events. For 15122/15188 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 34166 event pairs, 120 based on Foata normal form. 22/3683 useless extension candidates. Maximal degree in co-relation 11412. Up to 598 conditions per place. [2022-07-19 21:45:25,643 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 80 selfloop transitions, 44 changer transitions 2/355 dead transitions. [2022-07-19 21:45:25,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 355 transitions, 2635 flow [2022-07-19 21:45:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:45:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:45:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2022-07-19 21:45:25,645 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8602316602316602 [2022-07-19 21:45:25,645 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2022-07-19 21:45:25,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2022-07-19 21:45:25,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:25,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2022-07-19 21:45:25,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.14285714285714) internal successors, (1114), 7 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:25,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:25,649 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:25,649 INFO L186 Difference]: Start difference. First operand has 293 places, 330 transitions, 2203 flow. Second operand 7 states and 1114 transitions. [2022-07-19 21:45:25,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 355 transitions, 2635 flow [2022-07-19 21:45:25,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 355 transitions, 2531 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-07-19 21:45:25,703 INFO L242 Difference]: Finished difference. Result has 295 places, 331 transitions, 2216 flow [2022-07-19 21:45:25,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2216, PETRI_PLACES=295, PETRI_TRANSITIONS=331} [2022-07-19 21:45:25,704 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 129 predicate places. [2022-07-19 21:45:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 331 transitions, 2216 flow [2022-07-19 21:45:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:25,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:25,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:45:25,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2053872919, now seen corresponding path program 1 times [2022-07-19 21:45:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:25,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263891814] [2022-07-19 21:45:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:25,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:25,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263891814] [2022-07-19 21:45:25,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263891814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:25,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138043011] [2022-07-19 21:45:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:25,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:25,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:45:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:26,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 21:45:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:26,581 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 21:45:26,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-07-19 21:45:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:26,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:27,023 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:45:27,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 21:45:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:27,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138043011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:27,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:27,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-07-19 21:45:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933691873] [2022-07-19 21:45:27,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:27,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 21:45:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 21:45:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 21:45:27,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2022-07-19 21:45:27,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 331 transitions, 2216 flow. Second operand has 36 states, 36 states have (on average 89.97222222222223) internal successors, (3239), 36 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:27,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:27,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2022-07-19 21:45:27,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:45,766 INFO L129 PetriNetUnfolder]: 18574/39594 cut-off events. [2022-07-19 21:45:45,767 INFO L130 PetriNetUnfolder]: For 160855/162297 co-relation queries the response was YES. [2022-07-19 21:45:46,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136291 conditions, 39594 events. 18574/39594 cut-off events. For 160855/162297 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 395588 event pairs, 1475 based on Foata normal form. 864/38783 useless extension candidates. Maximal degree in co-relation 132166. Up to 8260 conditions per place. [2022-07-19 21:45:46,486 INFO L132 encePairwiseOnDemand]: 136/185 looper letters, 811 selfloop transitions, 361 changer transitions 585/1869 dead transitions. [2022-07-19 21:45:46,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1869 transitions, 13338 flow [2022-07-19 21:45:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-07-19 21:45:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2022-07-19 21:45:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 15826 transitions. [2022-07-19 21:45:46,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5002686897423739 [2022-07-19 21:45:46,510 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 15826 transitions. [2022-07-19 21:45:46,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 15826 transitions. [2022-07-19 21:45:46,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:46,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 15826 transitions. [2022-07-19 21:45:46,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 172 states, 171 states have (on average 92.54970760233918) internal successors, (15826), 171 states have internal predecessors, (15826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:46,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 172 states, 172 states have (on average 185.0) internal successors, (31820), 172 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:46,591 INFO L81 ComplementDD]: Finished complementDD. Result has 172 states, 172 states have (on average 185.0) internal successors, (31820), 172 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:46,592 INFO L186 Difference]: Start difference. First operand has 295 places, 331 transitions, 2216 flow. Second operand 171 states and 15826 transitions. [2022-07-19 21:45:46,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1869 transitions, 13338 flow [2022-07-19 21:45:47,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1869 transitions, 13039 flow, removed 59 selfloop flow, removed 5 redundant places. [2022-07-19 21:45:47,275 INFO L242 Difference]: Finished difference. Result has 573 places, 609 transitions, 5702 flow [2022-07-19 21:45:47,275 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=5702, PETRI_PLACES=573, PETRI_TRANSITIONS=609} [2022-07-19 21:45:47,276 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 407 predicate places. [2022-07-19 21:45:47,276 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 609 transitions, 5702 flow [2022-07-19 21:45:47,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 89.97222222222223) internal successors, (3239), 36 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:47,292 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:47,292 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:47,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:45:47,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:47,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:47,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1459653458, now seen corresponding path program 2 times [2022-07-19 21:45:47,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:47,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235928305] [2022-07-19 21:45:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:45:48,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235928305] [2022-07-19 21:45:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235928305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:45:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995590255] [2022-07-19 21:45:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:45:48,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:45:48,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:48,020 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:45:48,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:45:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:45:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:45:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 21:45:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:45:48,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:45:48,282 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:45:48,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:45:48,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 21:45:48,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:45:48,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:45:49,252 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 21:45:49,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-19 21:45:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:45:49,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:45:52,006 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:45:52,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-19 21:45:52,017 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:45:52,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2022-07-19 21:45:52,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:45:52,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2022-07-19 21:45:52,031 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:45:52,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2022-07-19 21:45:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 21:45:52,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995590255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:45:52,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:45:52,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29, 27] total 67 [2022-07-19 21:45:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058293080] [2022-07-19 21:45:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:45:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-19 21:45:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-19 21:45:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3961, Unknown=131, NotChecked=0, Total=4422 [2022-07-19 21:45:52,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 185 [2022-07-19 21:45:52,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 609 transitions, 5702 flow. Second operand has 67 states, 67 states have (on average 57.492537313432834) internal successors, (3852), 67 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:52,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:52,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 185 [2022-07-19 21:45:52,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand