./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 35987657 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-?-3598765 [2022-07-21 09:17:41,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:17:41,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:17:41,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:17:41,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:17:41,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:17:41,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:17:41,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:17:41,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:17:41,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:17:41,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:17:41,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:17:41,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:17:41,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:17:41,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:17:41,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:17:41,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:17:41,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:17:41,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:17:41,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:17:41,207 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:17:41,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:17:41,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:17:41,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:17:41,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:17:41,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:17:41,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:17:41,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:17:41,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:17:41,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:17:41,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:17:41,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:17:41,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:17:41,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:17:41,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:17:41,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:17:41,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:17:41,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:17:41,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:17:41,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:17:41,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:17:41,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:17:41,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:17:41,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:17:41,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:17:41,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:17:41,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:17:41,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:17:41,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:17:41,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:17:41,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:17:41,253 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:17:41,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:17:41,254 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:17:41,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:17:41,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:17:41,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:17:41,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:17:41,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:17:41,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:17:41,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:17:41,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:17:41,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:17:41,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:17:41,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-07-21 09:17:41,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:17:41,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:17:41,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:17:41,546 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:17:41,546 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:17:41,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-07-21 09:17:41,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de4ec6b0/5a07d4bdcc344a87bec7549c1777f4bd/FLAG6f0472e53 [2022-07-21 09:17:42,005 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:17:42,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-07-21 09:17:42,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de4ec6b0/5a07d4bdcc344a87bec7549c1777f4bd/FLAG6f0472e53 [2022-07-21 09:17:42,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2de4ec6b0/5a07d4bdcc344a87bec7549c1777f4bd [2022-07-21 09:17:42,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:17:42,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:17:42,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:17:42,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:17:42,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:17:42,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b72b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42, skipping insertion in model container [2022-07-21 09:17:42,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:17:42,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:17:42,200 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] [2022-07-21 09:17:42,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:17:42,247 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:17:42,277 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] [2022-07-21 09:17:42,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:17:42,292 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:17:42,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42 WrapperNode [2022-07-21 09:17:42,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:17:42,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:17:42,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:17:42,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:17:42,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,330 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-07-21 09:17:42,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:17:42,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:17:42,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:17:42,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:17:42,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:17:42,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:17:42,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:17:42,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:17:42,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (1/1) ... [2022-07-21 09:17:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:17:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:42,413 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) [2022-07-21 09:17:42,446 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 [2022-07-21 09:17:42,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:17:42,460 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:17:42,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:17:42,460 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:17:42,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:17:42,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:17:42,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:17:42,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:17:42,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:17:42,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:17:42,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:17:42,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:17:42,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:17:42,463 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:17:42,519 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:17:42,520 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:17:42,789 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:17:42,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:17:42,796 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:17:42,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:17:42 BoogieIcfgContainer [2022-07-21 09:17:42,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:17:42,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:17:42,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:17:42,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:17:42,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:17:42" (1/3) ... [2022-07-21 09:17:42,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8dd817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:17:42, skipping insertion in model container [2022-07-21 09:17:42,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:17:42" (2/3) ... [2022-07-21 09:17:42,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8dd817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:17:42, skipping insertion in model container [2022-07-21 09:17:42,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:17:42" (3/3) ... [2022-07-21 09:17:42,813 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-07-21 09:17:42,816 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:17:42,822 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:17:42,823 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:17:42,823 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:17:42,899 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:17:42,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2022-07-21 09:17:43,013 INFO L129 PetriNetUnfolder]: 15/183 cut-off events. [2022-07-21 09:17:43,013 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:17:43,019 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. [2022-07-21 09:17:43,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2022-07-21 09:17:43,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2022-07-21 09:17:43,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:17:43,038 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@4691070d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@31a549cf [2022-07-21 09:17:43,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:17:43,058 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-21 09:17:43,063 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:17:43,063 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:43,064 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] [2022-07-21 09:17:43,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1353629831, now seen corresponding path program 1 times [2022-07-21 09:17:43,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169916490] [2022-07-21 09:17:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169916490] [2022-07-21 09:17:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169916490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:43,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:17:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483118501] [2022-07-21 09:17:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:17:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:17:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:17:43,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 185 [2022-07-21 09:17:43,460 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) [2022-07-21 09:17:43,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:43,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 185 [2022-07-21 09:17:43,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:43,571 INFO L129 PetriNetUnfolder]: 20/296 cut-off events. [2022-07-21 09:17:43,571 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-21 09:17:43,572 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. [2022-07-21 09:17:43,574 INFO L132 encePairwiseOnDemand]: 165/185 looper letters, 37 selfloop transitions, 7 changer transitions 5/166 dead transitions. [2022-07-21 09:17:43,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 166 transitions, 442 flow [2022-07-21 09:17:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:17:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:17:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1079 transitions. [2022-07-21 09:17:43,586 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7290540540540541 [2022-07-21 09:17:43,587 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1079 transitions. [2022-07-21 09:17:43,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1079 transitions. [2022-07-21 09:17:43,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:43,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1079 transitions. [2022-07-21 09:17:43,594 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) [2022-07-21 09:17:43,599 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) [2022-07-21 09:17:43,600 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) [2022-07-21 09:17:43,601 INFO L186 Difference]: Start difference. First operand has 166 places, 174 transitions, 360 flow. Second operand 8 states and 1079 transitions. [2022-07-21 09:17:43,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 166 transitions, 442 flow [2022-07-21 09:17:43,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 166 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:17:43,607 INFO L242 Difference]: Finished difference. Result has 170 places, 158 transitions, 340 flow [2022-07-21 09:17:43,608 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} [2022-07-21 09:17:43,611 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 4 predicate places. [2022-07-21 09:17:43,612 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 158 transitions, 340 flow [2022-07-21 09:17:43,612 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) [2022-07-21 09:17:43,613 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:43,613 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] [2022-07-21 09:17:43,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:17:43,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash 379398891, now seen corresponding path program 1 times [2022-07-21 09:17:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:43,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225572106] [2022-07-21 09:17:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:43,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:43,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225572106] [2022-07-21 09:17:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225572106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:43,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:43,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:17:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493243497] [2022-07-21 09:17:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:43,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:17:43,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:17:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:17:43,754 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 185 [2022-07-21 09:17:43,755 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) [2022-07-21 09:17:43,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:43,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 185 [2022-07-21 09:17:43,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:43,932 INFO L129 PetriNetUnfolder]: 97/658 cut-off events. [2022-07-21 09:17:43,932 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-21 09:17:43,935 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. [2022-07-21 09:17:43,937 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 59 selfloop transitions, 5 changer transitions 4/188 dead transitions. [2022-07-21 09:17:43,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 188 transitions, 541 flow [2022-07-21 09:17:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:17:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:17:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 843 transitions. [2022-07-21 09:17:43,939 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7594594594594595 [2022-07-21 09:17:43,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 843 transitions. [2022-07-21 09:17:43,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 843 transitions. [2022-07-21 09:17:43,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:43,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 843 transitions. [2022-07-21 09:17:43,942 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) [2022-07-21 09:17:43,943 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) [2022-07-21 09:17:43,944 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) [2022-07-21 09:17:43,944 INFO L186 Difference]: Start difference. First operand has 170 places, 158 transitions, 340 flow. Second operand 6 states and 843 transitions. [2022-07-21 09:17:43,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 188 transitions, 541 flow [2022-07-21 09:17:43,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 188 transitions, 529 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 09:17:43,950 INFO L242 Difference]: Finished difference. Result has 167 places, 161 transitions, 357 flow [2022-07-21 09:17:43,951 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} [2022-07-21 09:17:43,951 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 1 predicate places. [2022-07-21 09:17:43,952 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 357 flow [2022-07-21 09:17:43,952 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) [2022-07-21 09:17:43,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:43,953 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] [2022-07-21 09:17:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:17:43,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:43,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1977040316, now seen corresponding path program 1 times [2022-07-21 09:17:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:43,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701095636] [2022-07-21 09:17:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:44,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:44,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701095636] [2022-07-21 09:17:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701095636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326169470] [2022-07-21 09:17:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:44,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:44,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:44,152 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) [2022-07-21 09:17:44,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:17:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:17:44,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:44,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:44,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326169470] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:44,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:17:44,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-07-21 09:17:44,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455984371] [2022-07-21 09:17:44,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:44,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:17:44,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:44,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:17:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:17:44,391 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-07-21 09:17:44,392 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) [2022-07-21 09:17:44,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:44,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-07-21 09:17:44,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:44,522 INFO L129 PetriNetUnfolder]: 97/704 cut-off events. [2022-07-21 09:17:44,522 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-21 09:17:44,524 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. [2022-07-21 09:17:44,526 INFO L132 encePairwiseOnDemand]: 180/185 looper letters, 24 selfloop transitions, 5 changer transitions 1/173 dead transitions. [2022-07-21 09:17:44,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 173 transitions, 445 flow [2022-07-21 09:17:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:17:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:17:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2022-07-21 09:17:44,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8743243243243243 [2022-07-21 09:17:44,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2022-07-21 09:17:44,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2022-07-21 09:17:44,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:44,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2022-07-21 09:17:44,530 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) [2022-07-21 09:17:44,531 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) [2022-07-21 09:17:44,532 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) [2022-07-21 09:17:44,532 INFO L186 Difference]: Start difference. First operand has 167 places, 161 transitions, 357 flow. Second operand 4 states and 647 transitions. [2022-07-21 09:17:44,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 173 transitions, 445 flow [2022-07-21 09:17:44,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 173 transitions, 441 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:17:44,538 INFO L242 Difference]: Finished difference. Result has 169 places, 165 transitions, 389 flow [2022-07-21 09:17:44,538 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} [2022-07-21 09:17:44,540 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 3 predicate places. [2022-07-21 09:17:44,540 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 165 transitions, 389 flow [2022-07-21 09:17:44,540 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) [2022-07-21 09:17:44,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:44,540 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] [2022-07-21 09:17:44,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:17:44,758 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 [2022-07-21 09:17:44,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash -43481260, now seen corresponding path program 2 times [2022-07-21 09:17:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850740996] [2022-07-21 09:17:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:44,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:44,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850740996] [2022-07-21 09:17:44,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850740996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:44,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:44,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:17:44,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917162384] [2022-07-21 09:17:44,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:44,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:17:44,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:17:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:17:44,830 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 185 [2022-07-21 09:17:44,830 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) [2022-07-21 09:17:44,831 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:44,831 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 185 [2022-07-21 09:17:44,831 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:44,921 INFO L129 PetriNetUnfolder]: 112/800 cut-off events. [2022-07-21 09:17:44,922 INFO L130 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2022-07-21 09:17:44,923 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. [2022-07-21 09:17:44,925 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 27 selfloop transitions, 6 changer transitions 0/176 dead transitions. [2022-07-21 09:17:44,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 176 transitions, 496 flow [2022-07-21 09:17:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:17:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:17:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 799 transitions. [2022-07-21 09:17:44,927 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8637837837837837 [2022-07-21 09:17:44,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 799 transitions. [2022-07-21 09:17:44,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 799 transitions. [2022-07-21 09:17:44,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:44,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 799 transitions. [2022-07-21 09:17:44,929 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) [2022-07-21 09:17:44,930 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) [2022-07-21 09:17:44,931 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) [2022-07-21 09:17:44,931 INFO L186 Difference]: Start difference. First operand has 169 places, 165 transitions, 389 flow. Second operand 5 states and 799 transitions. [2022-07-21 09:17:44,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 176 transitions, 496 flow [2022-07-21 09:17:44,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 176 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:17:44,934 INFO L242 Difference]: Finished difference. Result has 175 places, 167 transitions, 424 flow [2022-07-21 09:17:44,934 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} [2022-07-21 09:17:44,935 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 9 predicate places. [2022-07-21 09:17:44,935 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 167 transitions, 424 flow [2022-07-21 09:17:44,935 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) [2022-07-21 09:17:44,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:44,936 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] [2022-07-21 09:17:44,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:17:44,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1970492588, now seen corresponding path program 3 times [2022-07-21 09:17:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859843842] [2022-07-21 09:17:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:45,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:45,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859843842] [2022-07-21 09:17:45,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859843842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:45,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313096767] [2022-07-21 09:17:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:17:45,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:45,060 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) [2022-07-21 09:17:45,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:17:45,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:17:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 09:17:45,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:45,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313096767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:45,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:45,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-21 09:17:45,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393129739] [2022-07-21 09:17:45,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:45,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:17:45,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:45,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:17:45,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:17:45,378 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-21 09:17:45,379 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) [2022-07-21 09:17:45,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:45,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-21 09:17:45,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:45,501 INFO L129 PetriNetUnfolder]: 195/1309 cut-off events. [2022-07-21 09:17:45,502 INFO L130 PetriNetUnfolder]: For 621/621 co-relation queries the response was YES. [2022-07-21 09:17:45,505 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. [2022-07-21 09:17:45,508 INFO L132 encePairwiseOnDemand]: 175/185 looper letters, 39 selfloop transitions, 23 changer transitions 3/205 dead transitions. [2022-07-21 09:17:45,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 205 transitions, 719 flow [2022-07-21 09:17:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:17:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:17:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1117 transitions. [2022-07-21 09:17:45,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625482625482626 [2022-07-21 09:17:45,511 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1117 transitions. [2022-07-21 09:17:45,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1117 transitions. [2022-07-21 09:17:45,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:45,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1117 transitions. [2022-07-21 09:17:45,513 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) [2022-07-21 09:17:45,514 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) [2022-07-21 09:17:45,515 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) [2022-07-21 09:17:45,515 INFO L186 Difference]: Start difference. First operand has 175 places, 167 transitions, 424 flow. Second operand 7 states and 1117 transitions. [2022-07-21 09:17:45,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 205 transitions, 719 flow [2022-07-21 09:17:45,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 205 transitions, 709 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:17:45,521 INFO L242 Difference]: Finished difference. Result has 184 places, 189 transitions, 638 flow [2022-07-21 09:17:45,521 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} [2022-07-21 09:17:45,522 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 18 predicate places. [2022-07-21 09:17:45,522 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 189 transitions, 638 flow [2022-07-21 09:17:45,522 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) [2022-07-21 09:17:45,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:45,523 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] [2022-07-21 09:17:45,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:45,740 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 [2022-07-21 09:17:45,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1202560105, now seen corresponding path program 4 times [2022-07-21 09:17:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:45,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316727398] [2022-07-21 09:17:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:45,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316727398] [2022-07-21 09:17:45,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316727398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620886794] [2022-07-21 09:17:45,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:17:45,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:45,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:45,900 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) [2022-07-21 09:17:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:17:45,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:17:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:17:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 09:17:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:46,619 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 09:17:46,621 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 [2022-07-21 09:17:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:46,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:46,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:17:46,907 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 [2022-07-21 09:17:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:47,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620886794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:47,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:47,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 23, 19] total 40 [2022-07-21 09:17:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974108895] [2022-07-21 09:17:47,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 09:17:47,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 09:17:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 09:17:47,870 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 185 [2022-07-21 09:17:47,872 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) [2022-07-21 09:17:47,872 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:47,872 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 185 [2022-07-21 09:17:47,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:52,733 INFO L129 PetriNetUnfolder]: 7154/16363 cut-off events. [2022-07-21 09:17:52,733 INFO L130 PetriNetUnfolder]: For 17192/17192 co-relation queries the response was YES. [2022-07-21 09:17:52,768 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. [2022-07-21 09:17:52,873 INFO L132 encePairwiseOnDemand]: 143/185 looper letters, 562 selfloop transitions, 143 changer transitions 162/937 dead transitions. [2022-07-21 09:17:52,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 937 transitions, 5723 flow [2022-07-21 09:17:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 09:17:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-07-21 09:17:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6583 transitions. [2022-07-21 09:17:52,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.487449092928545 [2022-07-21 09:17:52,898 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6583 transitions. [2022-07-21 09:17:52,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6583 transitions. [2022-07-21 09:17:52,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:52,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6583 transitions. [2022-07-21 09:17:52,914 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) [2022-07-21 09:17:52,928 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) [2022-07-21 09:17:52,931 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) [2022-07-21 09:17:52,931 INFO L186 Difference]: Start difference. First operand has 184 places, 189 transitions, 638 flow. Second operand 73 states and 6583 transitions. [2022-07-21 09:17:52,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 937 transitions, 5723 flow [2022-07-21 09:17:52,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 937 transitions, 5639 flow, removed 42 selfloop flow, removed 0 redundant places. [2022-07-21 09:17:52,975 INFO L242 Difference]: Finished difference. Result has 312 places, 325 transitions, 2035 flow [2022-07-21 09:17:52,976 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} [2022-07-21 09:17:52,978 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 146 predicate places. [2022-07-21 09:17:52,978 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 325 transitions, 2035 flow [2022-07-21 09:17:52,979 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) [2022-07-21 09:17:52,979 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:52,980 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] [2022-07-21 09:17:52,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:53,200 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 [2022-07-21 09:17:53,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1833230058, now seen corresponding path program 1 times [2022-07-21 09:17:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:53,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493057705] [2022-07-21 09:17:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:53,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493057705] [2022-07-21 09:17:53,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493057705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:53,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:53,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:17:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641278778] [2022-07-21 09:17:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:17:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:17:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:17:53,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 185 [2022-07-21 09:17:53,264 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) [2022-07-21 09:17:53,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:53,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 185 [2022-07-21 09:17:53,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:53,692 INFO L129 PetriNetUnfolder]: 467/2997 cut-off events. [2022-07-21 09:17:53,692 INFO L130 PetriNetUnfolder]: For 16207/16334 co-relation queries the response was YES. [2022-07-21 09:17:53,712 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. [2022-07-21 09:17:53,725 INFO L132 encePairwiseOnDemand]: 179/185 looper letters, 51 selfloop transitions, 19 changer transitions 5/337 dead transitions. [2022-07-21 09:17:53,726 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 337 transitions, 2282 flow [2022-07-21 09:17:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:17:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:17:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2022-07-21 09:17:53,728 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8821621621621621 [2022-07-21 09:17:53,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2022-07-21 09:17:53,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2022-07-21 09:17:53,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:53,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2022-07-21 09:17:53,730 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) [2022-07-21 09:17:53,731 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) [2022-07-21 09:17:53,732 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) [2022-07-21 09:17:53,732 INFO L186 Difference]: Start difference. First operand has 312 places, 325 transitions, 2035 flow. Second operand 5 states and 816 transitions. [2022-07-21 09:17:53,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 337 transitions, 2282 flow [2022-07-21 09:17:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 337 transitions, 2136 flow, removed 50 selfloop flow, removed 20 redundant places. [2022-07-21 09:17:53,769 INFO L242 Difference]: Finished difference. Result has 282 places, 321 transitions, 1920 flow [2022-07-21 09:17:53,769 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} [2022-07-21 09:17:53,770 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 116 predicate places. [2022-07-21 09:17:53,770 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 321 transitions, 1920 flow [2022-07-21 09:17:53,770 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) [2022-07-21 09:17:53,770 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:53,770 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] [2022-07-21 09:17:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:17:53,771 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 401386038, now seen corresponding path program 2 times [2022-07-21 09:17:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:53,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038917259] [2022-07-21 09:17:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:53,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:53,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038917259] [2022-07-21 09:17:53,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038917259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:53,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:53,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:17:53,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802817441] [2022-07-21 09:17:53,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:53,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:17:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:53,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:17:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:17:53,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-21 09:17:53,902 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) [2022-07-21 09:17:53,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:53,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-21 09:17:53,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:54,487 INFO L129 PetriNetUnfolder]: 646/3445 cut-off events. [2022-07-21 09:17:54,488 INFO L130 PetriNetUnfolder]: For 16941/17079 co-relation queries the response was YES. [2022-07-21 09:17:54,507 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. [2022-07-21 09:17:54,516 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 84 selfloop transitions, 40 changer transitions 4/357 dead transitions. [2022-07-21 09:17:54,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 357 transitions, 2411 flow [2022-07-21 09:17:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:17:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:17:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2022-07-21 09:17:54,518 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8702702702702703 [2022-07-21 09:17:54,518 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2022-07-21 09:17:54,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2022-07-21 09:17:54,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:54,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2022-07-21 09:17:54,520 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) [2022-07-21 09:17:54,522 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) [2022-07-21 09:17:54,522 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) [2022-07-21 09:17:54,522 INFO L186 Difference]: Start difference. First operand has 282 places, 321 transitions, 1920 flow. Second operand 6 states and 966 transitions. [2022-07-21 09:17:54,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 357 transitions, 2411 flow [2022-07-21 09:17:54,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 357 transitions, 2387 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:17:54,565 INFO L242 Difference]: Finished difference. Result has 287 places, 324 transitions, 2042 flow [2022-07-21 09:17:54,566 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} [2022-07-21 09:17:54,568 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 121 predicate places. [2022-07-21 09:17:54,569 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 324 transitions, 2042 flow [2022-07-21 09:17:54,579 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) [2022-07-21 09:17:54,580 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:54,580 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] [2022-07-21 09:17:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:17:54,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1349633416, now seen corresponding path program 3 times [2022-07-21 09:17:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:54,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467684213] [2022-07-21 09:17:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:54,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:54,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:54,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467684213] [2022-07-21 09:17:54,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467684213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:54,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:54,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:17:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868107241] [2022-07-21 09:17:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:17:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:17:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:17:54,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-21 09:17:54,669 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) [2022-07-21 09:17:54,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:54,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-21 09:17:54,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:55,290 INFO L129 PetriNetUnfolder]: 692/3805 cut-off events. [2022-07-21 09:17:55,290 INFO L130 PetriNetUnfolder]: For 17484/17617 co-relation queries the response was YES. [2022-07-21 09:17:55,313 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. [2022-07-21 09:17:55,322 INFO L132 encePairwiseOnDemand]: 177/185 looper letters, 74 selfloop transitions, 53 changer transitions 2/358 dead transitions. [2022-07-21 09:17:55,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 358 transitions, 2597 flow [2022-07-21 09:17:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:17:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:17:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 963 transitions. [2022-07-21 09:17:55,324 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8675675675675676 [2022-07-21 09:17:55,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 963 transitions. [2022-07-21 09:17:55,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 963 transitions. [2022-07-21 09:17:55,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:55,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 963 transitions. [2022-07-21 09:17:55,326 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) [2022-07-21 09:17:55,327 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) [2022-07-21 09:17:55,327 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) [2022-07-21 09:17:55,327 INFO L186 Difference]: Start difference. First operand has 287 places, 324 transitions, 2042 flow. Second operand 6 states and 963 transitions. [2022-07-21 09:17:55,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 358 transitions, 2597 flow [2022-07-21 09:17:55,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 358 transitions, 2536 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-07-21 09:17:55,369 INFO L242 Difference]: Finished difference. Result has 293 places, 330 transitions, 2203 flow [2022-07-21 09:17:55,370 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} [2022-07-21 09:17:55,370 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 127 predicate places. [2022-07-21 09:17:55,370 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 330 transitions, 2203 flow [2022-07-21 09:17:55,371 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) [2022-07-21 09:17:55,371 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:55,371 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] [2022-07-21 09:17:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:17:55,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1439286922, now seen corresponding path program 4 times [2022-07-21 09:17:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888150975] [2022-07-21 09:17:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:55,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888150975] [2022-07-21 09:17:55,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888150975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:17:55,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:17:55,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:17:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708249329] [2022-07-21 09:17:55,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:17:55,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:17:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:17:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:17:55,442 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 185 [2022-07-21 09:17:55,442 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) [2022-07-21 09:17:55,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:55,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 185 [2022-07-21 09:17:55,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:56,065 INFO L129 PetriNetUnfolder]: 701/3822 cut-off events. [2022-07-21 09:17:56,065 INFO L130 PetriNetUnfolder]: For 15122/15188 co-relation queries the response was YES. [2022-07-21 09:17:56,087 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. [2022-07-21 09:17:56,096 INFO L132 encePairwiseOnDemand]: 178/185 looper letters, 80 selfloop transitions, 44 changer transitions 2/355 dead transitions. [2022-07-21 09:17:56,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 355 transitions, 2635 flow [2022-07-21 09:17:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:17:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:17:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1114 transitions. [2022-07-21 09:17:56,098 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8602316602316602 [2022-07-21 09:17:56,098 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1114 transitions. [2022-07-21 09:17:56,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1114 transitions. [2022-07-21 09:17:56,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:56,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1114 transitions. [2022-07-21 09:17:56,100 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) [2022-07-21 09:17:56,101 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) [2022-07-21 09:17:56,101 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) [2022-07-21 09:17:56,102 INFO L186 Difference]: Start difference. First operand has 293 places, 330 transitions, 2203 flow. Second operand 7 states and 1114 transitions. [2022-07-21 09:17:56,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 355 transitions, 2635 flow [2022-07-21 09:17:56,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 355 transitions, 2531 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-07-21 09:17:56,149 INFO L242 Difference]: Finished difference. Result has 295 places, 331 transitions, 2216 flow [2022-07-21 09:17:56,150 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} [2022-07-21 09:17:56,150 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 129 predicate places. [2022-07-21 09:17:56,150 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 331 transitions, 2216 flow [2022-07-21 09:17:56,150 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) [2022-07-21 09:17:56,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:56,151 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] [2022-07-21 09:17:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:17:56,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2053872919, now seen corresponding path program 1 times [2022-07-21 09:17:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183516788] [2022-07-21 09:17:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:56,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:17:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183516788] [2022-07-21 09:17:56,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183516788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232019724] [2022-07-21 09:17:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:56,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:56,372 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) [2022-07-21 09:17:56,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:17:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 09:17:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:56,893 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-21 09:17:56,894 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 [2022-07-21 09:17:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:56,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:57,320 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:17:57,320 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 [2022-07-21 09:17:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:57,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232019724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:57,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:57,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-07-21 09:17:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627899260] [2022-07-21 09:17:57,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:57,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 09:17:57,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 09:17:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 09:17:57,929 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 185 [2022-07-21 09:17:57,930 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) [2022-07-21 09:17:57,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:57,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 185 [2022-07-21 09:17:57,931 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:18:17,470 INFO L129 PetriNetUnfolder]: 18574/39594 cut-off events. [2022-07-21 09:18:17,470 INFO L130 PetriNetUnfolder]: For 160855/162297 co-relation queries the response was YES. [2022-07-21 09:18:18,017 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. [2022-07-21 09:18:18,130 INFO L132 encePairwiseOnDemand]: 136/185 looper letters, 811 selfloop transitions, 361 changer transitions 585/1869 dead transitions. [2022-07-21 09:18:18,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1869 transitions, 13338 flow [2022-07-21 09:18:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-07-21 09:18:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2022-07-21 09:18:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 15826 transitions. [2022-07-21 09:18:18,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5002686897423739 [2022-07-21 09:18:18,145 INFO L72 ComplementDD]: Start complementDD. Operand 171 states and 15826 transitions. [2022-07-21 09:18:18,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 171 states and 15826 transitions. [2022-07-21 09:18:18,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:18:18,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 171 states and 15826 transitions. [2022-07-21 09:18:18,168 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) [2022-07-21 09:18:18,340 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) [2022-07-21 09:18:18,343 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) [2022-07-21 09:18:18,343 INFO L186 Difference]: Start difference. First operand has 295 places, 331 transitions, 2216 flow. Second operand 171 states and 15826 transitions. [2022-07-21 09:18:18,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1869 transitions, 13338 flow [2022-07-21 09:18:18,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 1869 transitions, 13039 flow, removed 59 selfloop flow, removed 5 redundant places. [2022-07-21 09:18:18,861 INFO L242 Difference]: Finished difference. Result has 573 places, 609 transitions, 5702 flow [2022-07-21 09:18:18,862 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} [2022-07-21 09:18:18,863 INFO L279 CegarLoopForPetriNet]: 166 programPoint places, 407 predicate places. [2022-07-21 09:18:18,863 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 609 transitions, 5702 flow [2022-07-21 09:18:18,890 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) [2022-07-21 09:18:18,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:18:18,891 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] [2022-07-21 09:18:18,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 09:18:19,091 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 [2022-07-21 09:18:19,091 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:18:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:18:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1459653458, now seen corresponding path program 2 times [2022-07-21 09:18:19,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:18:19,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849664970] [2022-07-21 09:18:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:18:19,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:18:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:18:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:18:19,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:18:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849664970] [2022-07-21 09:18:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849664970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:18:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144007005] [2022-07-21 09:18:19,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:18:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:18:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:18:19,648 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) [2022-07-21 09:18:19,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:18:19,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:18:19,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:18:19,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 09:18:19,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:18:19,761 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 [2022-07-21 09:18:19,915 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:18:19,915 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 [2022-07-21 09:18:20,015 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 [2022-07-21 09:18:20,243 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 [2022-07-21 09:18:20,283 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 [2022-07-21 09:18:21,043 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:18:21,044 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 [2022-07-21 09:18:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:18:21,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:18:23,750 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:18:23,751 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 [2022-07-21 09:18:23,761 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:18:23,762 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 [2022-07-21 09:18:23,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 09:18:23,769 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 [2022-07-21 09:18:23,777 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:18:23,777 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 [2022-07-21 09:18:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 09:18:24,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144007005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:18:24,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:18:24,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29, 27] total 67 [2022-07-21 09:18:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038751690] [2022-07-21 09:18:24,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:18:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-21 09:18:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:18:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-21 09:18:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3965, Unknown=127, NotChecked=0, Total=4422 [2022-07-21 09:18:24,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 185 [2022-07-21 09:18:24,142 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) [2022-07-21 09:18:24,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:18:24,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 185 [2022-07-21 09:18:24,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand