./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --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/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:52:30,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:52:30,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:52:30,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:52:30,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:52:30,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:52:30,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:52:30,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:52:30,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:52:30,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:52:30,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:52:30,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:52:30,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:52:30,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:52:30,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:52:30,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:52:30,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:52:30,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:52:30,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:52:30,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:52:30,227 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:52:30,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:52:30,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:52:30,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:52:30,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:52:30,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:52:30,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:52:30,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:52:30,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:52:30,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:52:30,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:52:30,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:52:30,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:52:30,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:52:30,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:52:30,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:52:30,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:52:30,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:52:30,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:52:30,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:52:30,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:52:30,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:52:30,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:52:30,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:52:30,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:52:30,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:52:30,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:52:30,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:52:30,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:52:30,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:52:30,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:52:30,271 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:52:30,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:52:30,272 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:52:30,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:52:30,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:52:30,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:52:30,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:52:30,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:52:30,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:52:30,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:52:30,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:52:30,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:52:30,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:52:30,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:52:30,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:52:30,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:52:30,276 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:52:30,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:52:30,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:52:30,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-07-21 08:52:30,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:52:30,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:52:30,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:52:30,521 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:52:30,521 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:52:30,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-07-21 08:52:30,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6888ee70/0299972e012347a9a088a23b32acf83e/FLAG5c20574f5 [2022-07-21 08:52:31,137 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:52:31,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-07-21 08:52:31,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6888ee70/0299972e012347a9a088a23b32acf83e/FLAG5c20574f5 [2022-07-21 08:52:31,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6888ee70/0299972e012347a9a088a23b32acf83e [2022-07-21 08:52:31,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:52:31,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:52:31,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:52:31,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:52:31,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:52:31,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:52:31" (1/1) ... [2022-07-21 08:52:31,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113c4318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:31, skipping insertion in model container [2022-07-21 08:52:31,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:52:31" (1/1) ... [2022-07-21 08:52:31,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:52:31,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:52:31,939 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-07-21 08:52:31,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:52:31,986 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:52:32,009 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-07-21 08:52:32,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:52:32,059 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:52:32,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32 WrapperNode [2022-07-21 08:52:32,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:52:32,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:52:32,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:52:32,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:52:32,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,133 INFO L137 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-07-21 08:52:32,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:52:32,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:52:32,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:52:32,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:52:32,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:52:32,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:52:32,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:52:32,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:52:32,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (1/1) ... [2022-07-21 08:52:32,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:52:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:32,189 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 08:52:32,203 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 08:52:32,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:52:32,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:52:32,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:52:32,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:52:32,219 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:52:32,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:52:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-21 08:52:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-21 08:52:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:52:32,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:52:32,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:52:32,224 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 08:52:32,348 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:52:32,349 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:52:32,535 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:52:32,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:52:32,541 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2022-07-21 08:52:32,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:52:32 BoogieIcfgContainer [2022-07-21 08:52:32,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:52:32,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:52:32,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:52:32,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:52:32,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:52:31" (1/3) ... [2022-07-21 08:52:32,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf57fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:52:32, skipping insertion in model container [2022-07-21 08:52:32,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:52:32" (2/3) ... [2022-07-21 08:52:32,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf57fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:52:32, skipping insertion in model container [2022-07-21 08:52:32,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:52:32" (3/3) ... [2022-07-21 08:52:32,548 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-07-21 08:52:32,551 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:52:32,557 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:52:32,557 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:52:32,557 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:52:32,608 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:52:32,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 408 flow [2022-07-21 08:52:32,676 INFO L129 PetriNetUnfolder]: 45/272 cut-off events. [2022-07-21 08:52:32,677 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-21 08:52:32,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 272 events. 45/272 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 842 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 150. Up to 8 conditions per place. [2022-07-21 08:52:32,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 408 flow [2022-07-21 08:52:32,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 395 flow [2022-07-21 08:52:32,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:32,694 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@38bfb607, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26ecf6e4 [2022-07-21 08:52:32,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 08:52:32,707 INFO L129 PetriNetUnfolder]: 14/131 cut-off events. [2022-07-21 08:52:32,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:52:32,708 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:32,708 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:32,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:52:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash -959674574, now seen corresponding path program 1 times [2022-07-21 08:52:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:32,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458496982] [2022-07-21 08:52:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:32,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458496982] [2022-07-21 08:52:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458496982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:32,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:32,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94987734] [2022-07-21 08:52:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:32,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:32,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:32,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:32,956 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 200 [2022-07-21 08:52:32,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:32,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:32,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 200 [2022-07-21 08:52:32,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:33,015 INFO L129 PetriNetUnfolder]: 4/228 cut-off events. [2022-07-21 08:52:33,015 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:52:33,018 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 228 events. 4/228 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 629 event pairs, 0 based on Foata normal form. 39/254 useless extension candidates. Maximal degree in co-relation 125. Up to 9 conditions per place. [2022-07-21 08:52:33,019 INFO L132 encePairwiseOnDemand]: 170/200 looper letters, 10 selfloop transitions, 2 changer transitions 1/170 dead transitions. [2022-07-21 08:52:33,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 170 transitions, 369 flow [2022-07-21 08:52:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2022-07-21 08:52:33,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8783333333333333 [2022-07-21 08:52:33,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2022-07-21 08:52:33,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2022-07-21 08:52:33,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:33,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2022-07-21 08:52:33,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 08:52:33,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 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 08:52:33,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 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 08:52:33,049 INFO L186 Difference]: Start difference. First operand has 168 places, 195 transitions, 395 flow. Second operand 3 states and 527 transitions. [2022-07-21 08:52:33,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 170 transitions, 369 flow [2022-07-21 08:52:33,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 170 transitions, 369 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:33,054 INFO L242 Difference]: Finished difference. Result has 169 places, 166 transitions, 347 flow [2022-07-21 08:52:33,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2022-07-21 08:52:33,058 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2022-07-21 08:52:33,059 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 347 flow [2022-07-21 08:52:33,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:33,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:33,059 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:33,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:52:33,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:52:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1718762197, now seen corresponding path program 1 times [2022-07-21 08:52:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:33,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409047665] [2022-07-21 08:52:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:33,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:33,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409047665] [2022-07-21 08:52:33,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409047665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405981137] [2022-07-21 08:52:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:33,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:33,133 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 08:52:33,171 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 08:52:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:33,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:33,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405981137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:33,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:33,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462839518] [2022-07-21 08:52:33,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:33,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:33,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-21 08:52:33,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 08:52:33,350 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:33,350 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-21 08:52:33,350 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:33,453 INFO L129 PetriNetUnfolder]: 4/234 cut-off events. [2022-07-21 08:52:33,453 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:52:33,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 234 events. 4/234 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 227. Up to 6 conditions per place. [2022-07-21 08:52:33,454 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 11 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2022-07-21 08:52:33,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 176 transitions, 409 flow [2022-07-21 08:52:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1471 transitions. [2022-07-21 08:52:33,457 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8172222222222222 [2022-07-21 08:52:33,457 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1471 transitions. [2022-07-21 08:52:33,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1471 transitions. [2022-07-21 08:52:33,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:33,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1471 transitions. [2022-07-21 08:52:33,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.44444444444446) internal successors, (1471), 9 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states 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 08:52:33,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 08:52:33,465 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states 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 08:52:33,465 INFO L186 Difference]: Start difference. First operand has 169 places, 166 transitions, 347 flow. Second operand 9 states and 1471 transitions. [2022-07-21 08:52:33,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 176 transitions, 409 flow [2022-07-21 08:52:33,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:33,469 INFO L242 Difference]: Finished difference. Result has 178 places, 172 transitions, 395 flow [2022-07-21 08:52:33,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=178, PETRI_TRANSITIONS=172} [2022-07-21 08:52:33,470 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 10 predicate places. [2022-07-21 08:52:33,470 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 172 transitions, 395 flow [2022-07-21 08:52:33,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states 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 08:52:33,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:33,471 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:33,491 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 08:52:33,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:33,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:52:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2122069387, now seen corresponding path program 2 times [2022-07-21 08:52:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:33,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107872658] [2022-07-21 08:52:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:33,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107872658] [2022-07-21 08:52:33,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107872658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979827893] [2022-07-21 08:52:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:52:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:33,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:33,828 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 08:52:33,838 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 08:52:33,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:52:33,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:52:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:33,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:34,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979827893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:34,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794270563] [2022-07-21 08:52:34,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:34,032 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-21 08:52:34,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 172 transitions, 395 flow. Second operand has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states 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 08:52:34,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:34,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-21 08:52:34,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:34,256 INFO L129 PetriNetUnfolder]: 4/254 cut-off events. [2022-07-21 08:52:34,256 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-21 08:52:34,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 254 events. 4/254 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 4/247 useless extension candidates. Maximal degree in co-relation 221. Up to 11 conditions per place. [2022-07-21 08:52:34,258 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 19 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2022-07-21 08:52:34,258 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 196 transitions, 583 flow [2022-07-21 08:52:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3425 transitions. [2022-07-21 08:52:34,264 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8154761904761905 [2022-07-21 08:52:34,264 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3425 transitions. [2022-07-21 08:52:34,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3425 transitions. [2022-07-21 08:52:34,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:34,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3425 transitions. [2022-07-21 08:52:34,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 163.0952380952381) internal successors, (3425), 21 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states 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 08:52:34,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states 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 08:52:34,276 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states 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 08:52:34,276 INFO L186 Difference]: Start difference. First operand has 178 places, 172 transitions, 395 flow. Second operand 21 states and 3425 transitions. [2022-07-21 08:52:34,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 196 transitions, 583 flow [2022-07-21 08:52:34,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 196 transitions, 569 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:34,281 INFO L242 Difference]: Finished difference. Result has 202 places, 185 transitions, 519 flow [2022-07-21 08:52:34,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=519, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2022-07-21 08:52:34,283 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 34 predicate places. [2022-07-21 08:52:34,283 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 519 flow [2022-07-21 08:52:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.27777777777777) internal successors, (2939), 18 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states 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 08:52:34,284 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:34,284 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:34,301 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 08:52:34,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 08:52:34,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:52:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1016344139, now seen corresponding path program 3 times [2022-07-21 08:52:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:34,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357140822] [2022-07-21 08:52:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357140822] [2022-07-21 08:52:34,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357140822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655169740] [2022-07-21 08:52:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:52:34,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:34,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:34,708 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 08:52:34,709 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 08:52:34,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-21 08:52:34,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:52:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 08:52:35,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655169740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:35,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:35,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-21 08:52:35,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803679485] [2022-07-21 08:52:35,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 08:52:35,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 08:52:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-21 08:52:35,014 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 200 [2022-07-21 08:52:35,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 519 flow. Second operand has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states 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 08:52:35,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:35,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 200 [2022-07-21 08:52:35,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:35,277 INFO L129 PetriNetUnfolder]: 4/269 cut-off events. [2022-07-21 08:52:35,277 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-21 08:52:35,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 269 events. 4/269 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 3/261 useless extension candidates. Maximal degree in co-relation 317. Up to 17 conditions per place. [2022-07-21 08:52:35,278 INFO L132 encePairwiseOnDemand]: 194/200 looper letters, 25 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2022-07-21 08:52:35,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 211 transitions, 775 flow [2022-07-21 08:52:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:52:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:52:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4888 transitions. [2022-07-21 08:52:35,286 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8146666666666667 [2022-07-21 08:52:35,286 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4888 transitions. [2022-07-21 08:52:35,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4888 transitions. [2022-07-21 08:52:35,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:35,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4888 transitions. [2022-07-21 08:52:35,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 162.93333333333334) internal successors, (4888), 30 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states 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 08:52:35,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states 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 08:52:35,303 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states 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 08:52:35,304 INFO L186 Difference]: Start difference. First operand has 202 places, 185 transitions, 519 flow. Second operand 30 states and 4888 transitions. [2022-07-21 08:52:35,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 211 transitions, 775 flow [2022-07-21 08:52:35,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 211 transitions, 745 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:35,321 INFO L242 Difference]: Finished difference. Result has 229 places, 195 transitions, 647 flow [2022-07-21 08:52:35,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=647, PETRI_PLACES=229, PETRI_TRANSITIONS=195} [2022-07-21 08:52:35,323 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 61 predicate places. [2022-07-21 08:52:35,323 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 195 transitions, 647 flow [2022-07-21 08:52:35,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.43478260869566) internal successors, (3759), 23 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states 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 08:52:35,324 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:35,324 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:35,343 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 08:52:35,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:35,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-21 08:52:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash 282089810, now seen corresponding path program 4 times [2022-07-21 08:52:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:35,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974751804] [2022-07-21 08:52:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:35,561 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:35,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:35,600 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:35,601 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 08:52:35,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 08:52:35,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-21 08:52:35,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 08:52:35,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:52:35,603 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1] [2022-07-21 08:52:35,605 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:35,605 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 08:52:35,622 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:52:35,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 568 flow [2022-07-21 08:52:35,672 INFO L129 PetriNetUnfolder]: 75/444 cut-off events. [2022-07-21 08:52:35,673 INFO L130 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-07-21 08:52:35,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 444 events. 75/444 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1728 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 274. Up to 12 conditions per place. [2022-07-21 08:52:35,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 568 flow [2022-07-21 08:52:35,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 568 flow [2022-07-21 08:52:35,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:35,682 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@38bfb607, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26ecf6e4 [2022-07-21 08:52:35,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 08:52:35,688 INFO L129 PetriNetUnfolder]: 15/134 cut-off events. [2022-07-21 08:52:35,688 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:52:35,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:35,689 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:35,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -451559023, now seen corresponding path program 1 times [2022-07-21 08:52:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:35,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715863892] [2022-07-21 08:52:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:35,703 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 08:52:35,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:35,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715863892] [2022-07-21 08:52:35,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715863892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:35,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:35,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:52:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934678153] [2022-07-21 08:52:35,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:52:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:52:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:52:35,706 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 275 [2022-07-21 08:52:35,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 275 transitions, 568 flow. Second operand has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 08:52:35,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:35,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 275 [2022-07-21 08:52:35,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:35,763 INFO L129 PetriNetUnfolder]: 9/373 cut-off events. [2022-07-21 08:52:35,764 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-21 08:52:35,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 373 events. 9/373 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1442 event pairs, 0 based on Foata normal form. 91/443 useless extension candidates. Maximal degree in co-relation 233. Up to 7 conditions per place. [2022-07-21 08:52:35,766 INFO L132 encePairwiseOnDemand]: 236/275 looper letters, 4 selfloop transitions, 0 changer transitions 1/233 dead transitions. [2022-07-21 08:52:35,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 233 transitions, 492 flow [2022-07-21 08:52:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:52:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:52:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 501 transitions. [2022-07-21 08:52:35,769 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9109090909090909 [2022-07-21 08:52:35,769 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 501 transitions. [2022-07-21 08:52:35,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 501 transitions. [2022-07-21 08:52:35,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:35,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 501 transitions. [2022-07-21 08:52:35,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 250.5) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 08:52:35,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 08:52:35,771 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states 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 08:52:35,771 INFO L186 Difference]: Start difference. First operand has 235 places, 275 transitions, 568 flow. Second operand 2 states and 501 transitions. [2022-07-21 08:52:35,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 233 transitions, 492 flow [2022-07-21 08:52:35,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 233 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:35,775 INFO L242 Difference]: Finished difference. Result has 233 places, 232 transitions, 482 flow [2022-07-21 08:52:35,775 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=482, PETRI_PLACES=233, PETRI_TRANSITIONS=232} [2022-07-21 08:52:35,776 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, -2 predicate places. [2022-07-21 08:52:35,776 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 232 transitions, 482 flow [2022-07-21 08:52:35,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 230.0) internal successors, (460), 2 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 08:52:35,776 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:35,777 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:52:35,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2017606803, now seen corresponding path program 1 times [2022-07-21 08:52:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:35,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245018527] [2022-07-21 08:52:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:35,795 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 08:52:35,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:35,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245018527] [2022-07-21 08:52:35,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245018527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:35,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:35,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:35,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192682240] [2022-07-21 08:52:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:35,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:35,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:35,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:35,798 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-07-21 08:52:35,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 232 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 08:52:35,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:35,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-07-21 08:52:35,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:35,844 INFO L129 PetriNetUnfolder]: 9/376 cut-off events. [2022-07-21 08:52:35,844 INFO L130 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-07-21 08:52:35,847 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 376 events. 9/376 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1438 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 404. Up to 14 conditions per place. [2022-07-21 08:52:35,848 INFO L132 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-07-21 08:52:35,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 236 transitions, 520 flow [2022-07-21 08:52:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-21 08:52:35,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-07-21 08:52:35,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-21 08:52:35,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-21 08:52:35,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:35,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-21 08:52:35,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 08:52:35,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 08:52:35,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 08:52:35,853 INFO L186 Difference]: Start difference. First operand has 233 places, 232 transitions, 482 flow. Second operand 3 states and 682 transitions. [2022-07-21 08:52:35,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 236 transitions, 520 flow [2022-07-21 08:52:35,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:35,856 INFO L242 Difference]: Finished difference. Result has 235 places, 233 transitions, 494 flow [2022-07-21 08:52:35,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=235, PETRI_TRANSITIONS=233} [2022-07-21 08:52:35,857 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 0 predicate places. [2022-07-21 08:52:35,857 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 233 transitions, 494 flow [2022-07-21 08:52:35,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 08:52:35,858 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:35,858 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:52:35,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1078955039, now seen corresponding path program 1 times [2022-07-21 08:52:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:35,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619205125] [2022-07-21 08:52:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:35,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:35,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619205125] [2022-07-21 08:52:35,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619205125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:35,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728448762] [2022-07-21 08:52:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:35,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:35,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:35,900 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 08:52:35,901 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 08:52:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:52:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:35,991 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 08:52:35,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:52:35,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728448762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:35,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:52:35,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:52:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177780607] [2022-07-21 08:52:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:35,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:35,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:52:35,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 275 [2022-07-21 08:52:35,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 233 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 08:52:35,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:35,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 275 [2022-07-21 08:52:35,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:36,074 INFO L129 PetriNetUnfolder]: 7/331 cut-off events. [2022-07-21 08:52:36,087 INFO L130 PetriNetUnfolder]: For 21/45 co-relation queries the response was YES. [2022-07-21 08:52:36,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 331 events. 7/331 cut-off events. For 21/45 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1126 event pairs, 0 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 367. Up to 16 conditions per place. [2022-07-21 08:52:36,092 INFO L132 encePairwiseOnDemand]: 272/275 looper letters, 13 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2022-07-21 08:52:36,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 237 transitions, 532 flow [2022-07-21 08:52:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2022-07-21 08:52:36,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2022-07-21 08:52:36,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2022-07-21 08:52:36,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2022-07-21 08:52:36,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:36,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2022-07-21 08:52:36,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states 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 08:52:36,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 08:52:36,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 08:52:36,098 INFO L186 Difference]: Start difference. First operand has 235 places, 233 transitions, 494 flow. Second operand 3 states and 682 transitions. [2022-07-21 08:52:36,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 237 transitions, 532 flow [2022-07-21 08:52:36,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:36,102 INFO L242 Difference]: Finished difference. Result has 237 places, 234 transitions, 504 flow [2022-07-21 08:52:36,111 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=504, PETRI_PLACES=237, PETRI_TRANSITIONS=234} [2022-07-21 08:52:36,112 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 2 predicate places. [2022-07-21 08:52:36,113 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 234 transitions, 504 flow [2022-07-21 08:52:36,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 08:52:36,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:36,113 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:36,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:36,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:36,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1849767997, now seen corresponding path program 1 times [2022-07-21 08:52:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:36,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283797488] [2022-07-21 08:52:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:36,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:36,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283797488] [2022-07-21 08:52:36,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283797488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:36,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818613569] [2022-07-21 08:52:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:36,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:36,388 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 08:52:36,389 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 08:52:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:36,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818613569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:36,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:36,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:36,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796067757] [2022-07-21 08:52:36,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:36,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:36,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-21 08:52:36,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 234 transitions, 504 flow. Second operand has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states 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 08:52:36,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:36,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-21 08:52:36,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:36,596 INFO L129 PetriNetUnfolder]: 7/338 cut-off events. [2022-07-21 08:52:36,596 INFO L130 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-07-21 08:52:36,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 338 events. 7/338 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 385. Up to 11 conditions per place. [2022-07-21 08:52:36,600 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 14 selfloop transitions, 9 changer transitions 0/244 dead transitions. [2022-07-21 08:52:36,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 244 transitions, 572 flow [2022-07-21 08:52:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2014 transitions. [2022-07-21 08:52:36,604 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8137373737373738 [2022-07-21 08:52:36,604 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2014 transitions. [2022-07-21 08:52:36,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2014 transitions. [2022-07-21 08:52:36,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:36,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2014 transitions. [2022-07-21 08:52:36,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.77777777777777) internal successors, (2014), 9 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states 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 08:52:36,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states 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 08:52:36,611 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 275.0) internal successors, (2750), 10 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states 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 08:52:36,611 INFO L186 Difference]: Start difference. First operand has 237 places, 234 transitions, 504 flow. Second operand 9 states and 2014 transitions. [2022-07-21 08:52:36,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 244 transitions, 572 flow [2022-07-21 08:52:36,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 244 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:36,614 INFO L242 Difference]: Finished difference. Result has 247 places, 240 transitions, 552 flow [2022-07-21 08:52:36,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=552, PETRI_PLACES=247, PETRI_TRANSITIONS=240} [2022-07-21 08:52:36,615 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 12 predicate places. [2022-07-21 08:52:36,616 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 240 transitions, 552 flow [2022-07-21 08:52:36,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 223.2) internal successors, (2232), 10 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states 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 08:52:36,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:36,616 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:36,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:36,846 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:36,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1597542211, now seen corresponding path program 2 times [2022-07-21 08:52:36,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:36,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137193544] [2022-07-21 08:52:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:36,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:36,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137193544] [2022-07-21 08:52:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137193544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:36,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259420924] [2022-07-21 08:52:36,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:52:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:36,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:36,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:52:37,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:52:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:52:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:37,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:37,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259420924] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:37,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:37,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:52:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754471245] [2022-07-21 08:52:37,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:52:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:52:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:52:37,147 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-21 08:52:37,150 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 240 transitions, 552 flow. Second operand has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 08:52:37,150 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:37,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-21 08:52:37,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:37,330 INFO L129 PetriNetUnfolder]: 7/358 cut-off events. [2022-07-21 08:52:37,330 INFO L130 PetriNetUnfolder]: For 40/44 co-relation queries the response was YES. [2022-07-21 08:52:37,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 358 events. 7/358 cut-off events. For 40/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 472. Up to 11 conditions per place. [2022-07-21 08:52:37,334 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 22 selfloop transitions, 21 changer transitions 0/264 dead transitions. [2022-07-21 08:52:37,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 264 transitions, 746 flow [2022-07-21 08:52:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:52:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:52:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4688 transitions. [2022-07-21 08:52:37,342 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8117748917748918 [2022-07-21 08:52:37,342 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4688 transitions. [2022-07-21 08:52:37,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4688 transitions. [2022-07-21 08:52:37,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:37,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4688 transitions. [2022-07-21 08:52:37,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 223.23809523809524) internal successors, (4688), 21 states have internal predecessors, (4688), 0 states have call successors, (0), 0 states 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 08:52:37,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states 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 08:52:37,358 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 275.0) internal successors, (6050), 22 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states 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 08:52:37,358 INFO L186 Difference]: Start difference. First operand has 247 places, 240 transitions, 552 flow. Second operand 21 states and 4688 transitions. [2022-07-21 08:52:37,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 264 transitions, 746 flow [2022-07-21 08:52:37,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 264 transitions, 732 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:37,365 INFO L242 Difference]: Finished difference. Result has 271 places, 253 transitions, 676 flow [2022-07-21 08:52:37,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=676, PETRI_PLACES=271, PETRI_TRANSITIONS=253} [2022-07-21 08:52:37,366 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 36 predicate places. [2022-07-21 08:52:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 253 transitions, 676 flow [2022-07-21 08:52:37,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 223.33333333333334) internal successors, (4020), 18 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states 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 08:52:37,367 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:37,368 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:37,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 08:52:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:37,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -755629635, now seen corresponding path program 3 times [2022-07-21 08:52:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:37,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711552499] [2022-07-21 08:52:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711552499] [2022-07-21 08:52:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711552499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993636382] [2022-07-21 08:52:37,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:52:37,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:37,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:37,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:37,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:52:37,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-21 08:52:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:52:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:37,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:37,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 08:52:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993636382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:37,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:37,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-21 08:52:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219211182] [2022-07-21 08:52:37,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:37,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 08:52:37,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 08:52:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-21 08:52:37,963 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 275 [2022-07-21 08:52:37,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 253 transitions, 676 flow. Second operand has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states 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 08:52:37,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:37,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 275 [2022-07-21 08:52:37,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:38,223 INFO L129 PetriNetUnfolder]: 7/373 cut-off events. [2022-07-21 08:52:38,224 INFO L130 PetriNetUnfolder]: For 128/132 co-relation queries the response was YES. [2022-07-21 08:52:38,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 373 events. 7/373 cut-off events. For 128/132 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1121 event pairs, 0 based on Foata normal form. 3/362 useless extension candidates. Maximal degree in co-relation 568. Up to 17 conditions per place. [2022-07-21 08:52:38,228 INFO L132 encePairwiseOnDemand]: 269/275 looper letters, 28 selfloop transitions, 30 changer transitions 0/279 dead transitions. [2022-07-21 08:52:38,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 279 transitions, 938 flow [2022-07-21 08:52:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:52:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:52:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6691 transitions. [2022-07-21 08:52:38,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.811030303030303 [2022-07-21 08:52:38,234 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6691 transitions. [2022-07-21 08:52:38,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6691 transitions. [2022-07-21 08:52:38,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:38,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6691 transitions. [2022-07-21 08:52:38,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 223.03333333333333) internal successors, (6691), 30 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:52:38,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states 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 08:52:38,251 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 275.0) internal successors, (8525), 31 states have internal predecessors, (8525), 0 states have call successors, (0), 0 states 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 08:52:38,251 INFO L186 Difference]: Start difference. First operand has 271 places, 253 transitions, 676 flow. Second operand 30 states and 6691 transitions. [2022-07-21 08:52:38,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 279 transitions, 938 flow [2022-07-21 08:52:38,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 279 transitions, 908 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-07-21 08:52:38,256 INFO L242 Difference]: Finished difference. Result has 298 places, 263 transitions, 804 flow [2022-07-21 08:52:38,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=804, PETRI_PLACES=298, PETRI_TRANSITIONS=263} [2022-07-21 08:52:38,257 INFO L279 CegarLoopForPetriNet]: 235 programPoint places, 63 predicate places. [2022-07-21 08:52:38,257 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 263 transitions, 804 flow [2022-07-21 08:52:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 223.47826086956522) internal successors, (5140), 23 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states 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 08:52:38,258 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:38,258 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:38,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:38,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:38,476 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-21 08:52:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:38,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1849066191, now seen corresponding path program 4 times [2022-07-21 08:52:38,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:38,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60639564] [2022-07-21 08:52:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:38,504 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:52:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:52:38,548 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:52:38,550 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:52:38,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 08:52:38,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 08:52:38,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-21 08:52:38,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 08:52:38,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 08:52:38,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 08:52:38,551 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-07-21 08:52:38,551 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:52:38,551 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 08:52:38,578 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:52:38,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 298 places, 350 transitions, 730 flow [2022-07-21 08:52:38,658 INFO L129 PetriNetUnfolder]: 110/649 cut-off events. [2022-07-21 08:52:38,658 INFO L130 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-07-21 08:52:38,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 649 events. 110/649 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2862 event pairs, 1 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 452. Up to 16 conditions per place. [2022-07-21 08:52:38,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 350 transitions, 730 flow [2022-07-21 08:52:38,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 298 places, 350 transitions, 730 flow [2022-07-21 08:52:38,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:52:38,679 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@38bfb607, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26ecf6e4 [2022-07-21 08:52:38,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 08:52:38,684 INFO L129 PetriNetUnfolder]: 13/134 cut-off events. [2022-07-21 08:52:38,684 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:52:38,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:38,684 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:38,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:52:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:38,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2017601518, now seen corresponding path program 1 times [2022-07-21 08:52:38,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:38,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065319992] [2022-07-21 08:52:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:38,699 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 08:52:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:38,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065319992] [2022-07-21 08:52:38,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065319992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:38,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:38,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:52:38,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918985277] [2022-07-21 08:52:38,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:38,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:38,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:52:38,702 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-07-21 08:52:38,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 350 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 08:52:38,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:38,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-07-21 08:52:38,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:38,818 INFO L129 PetriNetUnfolder]: 16/552 cut-off events. [2022-07-21 08:52:38,818 INFO L130 PetriNetUnfolder]: For 50/59 co-relation queries the response was YES. [2022-07-21 08:52:38,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 552 events. 16/552 cut-off events. For 50/59 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2480 event pairs, 1 based on Foata normal form. 207/728 useless extension candidates. Maximal degree in co-relation 402. Up to 23 conditions per place. [2022-07-21 08:52:38,825 INFO L132 encePairwiseOnDemand]: 296/350 looper letters, 15 selfloop transitions, 2 changer transitions 1/299 dead transitions. [2022-07-21 08:52:38,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 299 transitions, 662 flow [2022-07-21 08:52:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-07-21 08:52:38,827 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8723809523809524 [2022-07-21 08:52:38,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-07-21 08:52:38,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-07-21 08:52:38,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:38,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-07-21 08:52:38,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states 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 08:52:38,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 08:52:38,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 08:52:38,830 INFO L186 Difference]: Start difference. First operand has 298 places, 350 transitions, 730 flow. Second operand 3 states and 916 transitions. [2022-07-21 08:52:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 299 transitions, 662 flow [2022-07-21 08:52:38,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 299 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:52:38,834 INFO L242 Difference]: Finished difference. Result has 297 places, 295 transitions, 630 flow [2022-07-21 08:52:38,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=630, PETRI_PLACES=297, PETRI_TRANSITIONS=295} [2022-07-21 08:52:38,835 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, -1 predicate places. [2022-07-21 08:52:38,835 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 295 transitions, 630 flow [2022-07-21 08:52:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 08:52:38,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:38,835 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:38,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 08:52:38,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:52:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash -115431363, now seen corresponding path program 1 times [2022-07-21 08:52:38,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:38,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954231984] [2022-07-21 08:52:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:38,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:38,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954231984] [2022-07-21 08:52:38,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954231984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895055107] [2022-07-21 08:52:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:38,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:38,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:38,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:38,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 08:52:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:52:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:38,933 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 08:52:38,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:52:38,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895055107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:38,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:52:38,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:52:38,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128779171] [2022-07-21 08:52:38,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:52:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:38,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:52:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:52:38,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 350 [2022-07-21 08:52:38,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 295 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 08:52:38,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:38,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 350 [2022-07-21 08:52:38,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:39,002 INFO L129 PetriNetUnfolder]: 14/506 cut-off events. [2022-07-21 08:52:39,002 INFO L130 PetriNetUnfolder]: For 44/83 co-relation queries the response was YES. [2022-07-21 08:52:39,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 506 events. 14/506 cut-off events. For 44/83 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2174 event pairs, 1 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 538. Up to 30 conditions per place. [2022-07-21 08:52:39,009 INFO L132 encePairwiseOnDemand]: 347/350 looper letters, 15 selfloop transitions, 2 changer transitions 0/299 dead transitions. [2022-07-21 08:52:39,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 299 transitions, 672 flow [2022-07-21 08:52:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:52:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:52:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-07-21 08:52:39,010 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8228571428571428 [2022-07-21 08:52:39,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-07-21 08:52:39,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-07-21 08:52:39,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:39,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-07-21 08:52:39,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states 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 08:52:39,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 08:52:39,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states 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 08:52:39,013 INFO L186 Difference]: Start difference. First operand has 297 places, 295 transitions, 630 flow. Second operand 3 states and 864 transitions. [2022-07-21 08:52:39,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 299 transitions, 672 flow [2022-07-21 08:52:39,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 299 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:39,045 INFO L242 Difference]: Finished difference. Result has 298 places, 296 transitions, 640 flow [2022-07-21 08:52:39,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=298, PETRI_TRANSITIONS=296} [2022-07-21 08:52:39,046 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 0 predicate places. [2022-07-21 08:52:39,046 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 296 transitions, 640 flow [2022-07-21 08:52:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states 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 08:52:39,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:39,047 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:39,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:39,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 08:52:39,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:52:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash 417894738, now seen corresponding path program 1 times [2022-07-21 08:52:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:39,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782907971] [2022-07-21 08:52:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:39,274 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 08:52:39,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782907971] [2022-07-21 08:52:39,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782907971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011271819] [2022-07-21 08:52:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:39,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:39,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:39,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:39,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 08:52:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:52:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:39,389 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 08:52:39,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:39,408 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 08:52:39,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011271819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:39,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:39,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:52:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857005833] [2022-07-21 08:52:39,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:39,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:52:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:52:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:52:39,411 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-07-21 08:52:39,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 296 transitions, 640 flow. Second operand has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states 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 08:52:39,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:39,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-07-21 08:52:39,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:39,547 INFO L129 PetriNetUnfolder]: 14/513 cut-off events. [2022-07-21 08:52:39,548 INFO L130 PetriNetUnfolder]: For 51/60 co-relation queries the response was YES. [2022-07-21 08:52:39,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 513 events. 14/513 cut-off events. For 51/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2169 event pairs, 1 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 520. Up to 20 conditions per place. [2022-07-21 08:52:39,560 INFO L132 encePairwiseOnDemand]: 344/350 looper letters, 16 selfloop transitions, 9 changer transitions 0/306 dead transitions. [2022-07-21 08:52:39,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 306 transitions, 712 flow [2022-07-21 08:52:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:52:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:52:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2556 transitions. [2022-07-21 08:52:39,563 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8114285714285714 [2022-07-21 08:52:39,563 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2556 transitions. [2022-07-21 08:52:39,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2556 transitions. [2022-07-21 08:52:39,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:39,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2556 transitions. [2022-07-21 08:52:39,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 284.0) internal successors, (2556), 9 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states 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 08:52:39,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states 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 08:52:39,570 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states 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 08:52:39,570 INFO L186 Difference]: Start difference. First operand has 298 places, 296 transitions, 640 flow. Second operand 9 states and 2556 transitions. [2022-07-21 08:52:39,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 306 transitions, 712 flow [2022-07-21 08:52:39,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 306 transitions, 710 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:39,576 INFO L242 Difference]: Finished difference. Result has 308 places, 302 transitions, 688 flow [2022-07-21 08:52:39,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=308, PETRI_TRANSITIONS=302} [2022-07-21 08:52:39,577 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 10 predicate places. [2022-07-21 08:52:39,577 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 302 transitions, 688 flow [2022-07-21 08:52:39,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 283.1) internal successors, (2831), 10 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states 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 08:52:39,578 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:39,578 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:39,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 08:52:39,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 08:52:39,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:52:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash 575842066, now seen corresponding path program 2 times [2022-07-21 08:52:39,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:39,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112508376] [2022-07-21 08:52:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 08:52:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112508376] [2022-07-21 08:52:39,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112508376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512917736] [2022-07-21 08:52:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:52:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:39,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:39,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 08:52:39,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:52:39,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:52:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:52:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:52:39,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:52:40,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512917736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:40,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:40,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-21 08:52:40,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913860037] [2022-07-21 08:52:40,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:40,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 08:52:40,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 08:52:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-21 08:52:40,014 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 350 [2022-07-21 08:52:40,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 302 transitions, 688 flow. Second operand has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states 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 08:52:40,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:40,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 350 [2022-07-21 08:52:40,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:40,275 INFO L129 PetriNetUnfolder]: 12/488 cut-off events. [2022-07-21 08:52:40,275 INFO L130 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-07-21 08:52:40,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 488 events. 12/488 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1763 event pairs, 2 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 498. Up to 29 conditions per place. [2022-07-21 08:52:40,284 INFO L132 encePairwiseOnDemand]: 339/350 looper letters, 35 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2022-07-21 08:52:40,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 334 transitions, 936 flow [2022-07-21 08:52:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 08:52:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 08:52:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6916 transitions. [2022-07-21 08:52:40,291 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904 [2022-07-21 08:52:40,291 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6916 transitions. [2022-07-21 08:52:40,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6916 transitions. [2022-07-21 08:52:40,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:40,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6916 transitions. [2022-07-21 08:52:40,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 276.64) internal successors, (6916), 25 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states 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 08:52:40,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states 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 08:52:40,335 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 350.0) internal successors, (9100), 26 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states 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 08:52:40,336 INFO L186 Difference]: Start difference. First operand has 308 places, 302 transitions, 688 flow. Second operand 25 states and 6916 transitions. [2022-07-21 08:52:40,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 334 transitions, 936 flow [2022-07-21 08:52:40,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 334 transitions, 922 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:52:40,340 INFO L242 Difference]: Finished difference. Result has 339 places, 318 transitions, 846 flow [2022-07-21 08:52:40,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=846, PETRI_PLACES=339, PETRI_TRANSITIONS=318} [2022-07-21 08:52:40,341 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 41 predicate places. [2022-07-21 08:52:40,341 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 318 transitions, 846 flow [2022-07-21 08:52:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 277.05263157894734) internal successors, (5264), 19 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states 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 08:52:40,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:40,343 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:40,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-21 08:52:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 08:52:40,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:52:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash -302385302, now seen corresponding path program 1 times [2022-07-21 08:52:40,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:40,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688729629] [2022-07-21 08:52:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688729629] [2022-07-21 08:52:40,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688729629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:52:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859250261] [2022-07-21 08:52:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:40,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:52:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:52:40,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:52:40,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 08:52:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:52:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:52:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:40,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:52:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:52:40,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859250261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:52:40,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:52:40,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-21 08:52:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639549468] [2022-07-21 08:52:40,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:52:40,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 08:52:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 08:52:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-21 08:52:40,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 350 [2022-07-21 08:52:40,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 318 transitions, 846 flow. Second operand has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states 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 08:52:40,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:40,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 350 [2022-07-21 08:52:40,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:52:41,358 INFO L129 PetriNetUnfolder]: 12/503 cut-off events. [2022-07-21 08:52:41,358 INFO L130 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-07-21 08:52:41,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 503 events. 12/503 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1767 event pairs, 2 based on Foata normal form. 3/485 useless extension candidates. Maximal degree in co-relation 531. Up to 20 conditions per place. [2022-07-21 08:52:41,370 INFO L132 encePairwiseOnDemand]: 344/350 looper letters, 30 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2022-07-21 08:52:41,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 344 transitions, 1112 flow [2022-07-21 08:52:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:52:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:52:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8493 transitions. [2022-07-21 08:52:41,382 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8088571428571428 [2022-07-21 08:52:41,382 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8493 transitions. [2022-07-21 08:52:41,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8493 transitions. [2022-07-21 08:52:41,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:52:41,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8493 transitions. [2022-07-21 08:52:41,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 283.1) internal successors, (8493), 30 states have internal predecessors, (8493), 0 states have call successors, (0), 0 states 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 08:52:41,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states 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 08:52:41,416 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 350.0) internal successors, (10850), 31 states have internal predecessors, (10850), 0 states have call successors, (0), 0 states 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 08:52:41,416 INFO L186 Difference]: Start difference. First operand has 339 places, 318 transitions, 846 flow. Second operand 30 states and 8493 transitions. [2022-07-21 08:52:41,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 344 transitions, 1112 flow [2022-07-21 08:52:41,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 344 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-21 08:52:41,425 INFO L242 Difference]: Finished difference. Result has 365 places, 328 transitions, 970 flow [2022-07-21 08:52:41,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=970, PETRI_PLACES=365, PETRI_TRANSITIONS=328} [2022-07-21 08:52:41,426 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 67 predicate places. [2022-07-21 08:52:41,426 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 328 transitions, 970 flow [2022-07-21 08:52:41,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 283.4347826086956) internal successors, (6519), 23 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states 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 08:52:41,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:52:41,428 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:52:41,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 08:52:41,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 08:52:41,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:52:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:52:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1140146688, now seen corresponding path program 2 times [2022-07-21 08:52:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:52:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660047768] [2022-07-21 08:52:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:52:41,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:52:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:52:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-21 08:52:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:52:42,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660047768] [2022-07-21 08:52:42,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660047768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:52:42,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:52:42,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 08:52:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159246855] [2022-07-21 08:52:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:52:42,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 08:52:42,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:52:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 08:52:42,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:52:42,018 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 350 [2022-07-21 08:52:42,020 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 328 transitions, 970 flow. Second operand has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 08:52:42,020 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:52:42,020 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 350 [2022-07-21 08:52:42,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:10,786 INFO L129 PetriNetUnfolder]: 62497/170320 cut-off events. [2022-07-21 08:53:10,787 INFO L130 PetriNetUnfolder]: For 13726/13745 co-relation queries the response was YES. [2022-07-21 08:53:12,944 INFO L84 FinitePrefix]: Finished finitePrefix Result has 270609 conditions, 170320 events. 62497/170320 cut-off events. For 13726/13745 co-relation queries the response was YES. Maximal size of possible extension queue 4973. Compared 2524319 event pairs, 41170 based on Foata normal form. 19/157532 useless extension candidates. Maximal degree in co-relation 270359. Up to 61103 conditions per place. [2022-07-21 08:53:13,912 INFO L132 encePairwiseOnDemand]: 332/350 looper letters, 264 selfloop transitions, 31 changer transitions 0/554 dead transitions. [2022-07-21 08:53:13,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 554 transitions, 2255 flow [2022-07-21 08:53:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 08:53:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-21 08:53:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5327 transitions. [2022-07-21 08:53:13,917 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6918181818181818 [2022-07-21 08:53:13,917 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5327 transitions. [2022-07-21 08:53:13,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5327 transitions. [2022-07-21 08:53:13,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:13,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5327 transitions. [2022-07-21 08:53:13,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 242.13636363636363) internal successors, (5327), 22 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states 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 08:53:13,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states 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 08:53:13,931 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 350.0) internal successors, (8050), 23 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states 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 08:53:13,931 INFO L186 Difference]: Start difference. First operand has 365 places, 328 transitions, 970 flow. Second operand 22 states and 5327 transitions. [2022-07-21 08:53:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 554 transitions, 2255 flow [2022-07-21 08:53:14,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 554 transitions, 2211 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-07-21 08:53:14,118 INFO L242 Difference]: Finished difference. Result has 378 places, 360 transitions, 1131 flow [2022-07-21 08:53:14,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1131, PETRI_PLACES=378, PETRI_TRANSITIONS=360} [2022-07-21 08:53:14,119 INFO L279 CegarLoopForPetriNet]: 298 programPoint places, 80 predicate places. [2022-07-21 08:53:14,120 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 360 transitions, 1131 flow [2022-07-21 08:53:14,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 231.0) internal successors, (3465), 15 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states 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 08:53:14,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,121 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 08:53:14,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-21 08:53:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2007247325, now seen corresponding path program 1 times [2022-07-21 08:53:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811319988] [2022-07-21 08:53:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:14,143 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:53:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:53:14,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:53:14,170 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:53:14,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 08:53:14,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 08:53:14,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-21 08:53:14,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 08:53:14,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 08:53:14,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 08:53:14,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 08:53:14,171 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-07-21 08:53:14,172 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 08:53:14,172 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 08:53:14,199 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:53:14,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 361 places, 425 transitions, 894 flow [2022-07-21 08:53:14,298 INFO L129 PetriNetUnfolder]: 157/922 cut-off events. [2022-07-21 08:53:14,298 INFO L130 PetriNetUnfolder]: For 48/54 co-relation queries the response was YES. [2022-07-21 08:53:14,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 922 events. 157/922 cut-off events. For 48/54 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4423 event pairs, 6 based on Foata normal form. 0/756 useless extension candidates. Maximal degree in co-relation 669. Up to 32 conditions per place. [2022-07-21 08:53:14,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 361 places, 425 transitions, 894 flow [2022-07-21 08:53:14,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 361 places, 425 transitions, 894 flow [2022-07-21 08:53:14,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:53:14,328 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@38bfb607, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26ecf6e4 [2022-07-21 08:53:14,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:53:14,332 INFO L129 PetriNetUnfolder]: 15/139 cut-off events. [2022-07-21 08:53:14,332 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:53:14,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,333 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1166343758, now seen corresponding path program 1 times [2022-07-21 08:53:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63300898] [2022-07-21 08:53:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,341 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 08:53:14,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63300898] [2022-07-21 08:53:14,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63300898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:14,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:14,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:53:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777341969] [2022-07-21 08:53:14,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 08:53:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 08:53:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 08:53:14,343 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 425 [2022-07-21 08:53:14,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 425 transitions, 894 flow. Second operand has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 08:53:14,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 425 [2022-07-21 08:53:14,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,444 INFO L129 PetriNetUnfolder]: 31/787 cut-off events. [2022-07-21 08:53:14,444 INFO L130 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-07-21 08:53:14,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 787 events. 31/787 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3929 event pairs, 6 based on Foata normal form. 481/1223 useless extension candidates. Maximal degree in co-relation 583. Up to 37 conditions per place. [2022-07-21 08:53:14,457 INFO L132 encePairwiseOnDemand]: 362/425 looper letters, 8 selfloop transitions, 0 changer transitions 1/357 dead transitions. [2022-07-21 08:53:14,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 357 transitions, 774 flow [2022-07-21 08:53:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 08:53:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 08:53:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 769 transitions. [2022-07-21 08:53:14,458 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047058823529411 [2022-07-21 08:53:14,458 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 769 transitions. [2022-07-21 08:53:14,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 769 transitions. [2022-07-21 08:53:14,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 769 transitions. [2022-07-21 08:53:14,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 384.5) internal successors, (769), 2 states have internal predecessors, (769), 0 states have call successors, (0), 0 states 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 08:53:14,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 08:53:14,461 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states 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 08:53:14,461 INFO L186 Difference]: Start difference. First operand has 361 places, 425 transitions, 894 flow. Second operand 2 states and 769 transitions. [2022-07-21 08:53:14,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 357 transitions, 774 flow [2022-07-21 08:53:14,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 357 transitions, 774 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:14,465 INFO L242 Difference]: Finished difference. Result has 357 places, 356 transitions, 756 flow [2022-07-21 08:53:14,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=756, PETRI_PLACES=357, PETRI_TRANSITIONS=356} [2022-07-21 08:53:14,466 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, -4 predicate places. [2022-07-21 08:53:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 356 transitions, 756 flow [2022-07-21 08:53:14,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states 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 08:53:14,466 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,466 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 08:53:14,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash -204729741, now seen corresponding path program 1 times [2022-07-21 08:53:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937266271] [2022-07-21 08:53:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,478 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 08:53:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937266271] [2022-07-21 08:53:14,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937266271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:14,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:14,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:53:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122957837] [2022-07-21 08:53:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:14,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:14,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:53:14,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-07-21 08:53:14,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 356 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 08:53:14,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-07-21 08:53:14,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,592 INFO L129 PetriNetUnfolder]: 31/790 cut-off events. [2022-07-21 08:53:14,592 INFO L130 PetriNetUnfolder]: For 123/138 co-relation queries the response was YES. [2022-07-21 08:53:14,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 790 events. 31/790 cut-off events. For 123/138 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3924 event pairs, 6 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 887. Up to 44 conditions per place. [2022-07-21 08:53:14,609 INFO L132 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/360 dead transitions. [2022-07-21 08:53:14,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 360 transitions, 802 flow [2022-07-21 08:53:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-07-21 08:53:14,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-07-21 08:53:14,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-07-21 08:53:14,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-07-21 08:53:14,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-07-21 08:53:14,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 08:53:14,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 08:53:14,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 08:53:14,613 INFO L186 Difference]: Start difference. First operand has 357 places, 356 transitions, 756 flow. Second operand 3 states and 1046 transitions. [2022-07-21 08:53:14,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 360 transitions, 802 flow [2022-07-21 08:53:14,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 360 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:53:14,619 INFO L242 Difference]: Finished difference. Result has 359 places, 357 transitions, 768 flow [2022-07-21 08:53:14,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=359, PETRI_TRANSITIONS=357} [2022-07-21 08:53:14,620 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, -2 predicate places. [2022-07-21 08:53:14,620 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 357 transitions, 768 flow [2022-07-21 08:53:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 08:53:14,620 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,620 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 08:53:14,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1258974330, now seen corresponding path program 1 times [2022-07-21 08:53:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:14,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513883303] [2022-07-21 08:53:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:14,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513883303] [2022-07-21 08:53:14,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513883303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876510378] [2022-07-21 08:53:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:14,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:14,660 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:14,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 08:53:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:53:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:14,769 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 08:53:14,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:53:14,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876510378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:14,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:53:14,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:53:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980671078] [2022-07-21 08:53:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:14,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:53:14,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:53:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:53:14,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 425 [2022-07-21 08:53:14,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 357 transitions, 768 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 08:53:14,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:14,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 425 [2022-07-21 08:53:14,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:14,902 INFO L129 PetriNetUnfolder]: 29/745 cut-off events. [2022-07-21 08:53:14,902 INFO L130 PetriNetUnfolder]: For 113/175 co-relation queries the response was YES. [2022-07-21 08:53:14,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 745 events. 29/745 cut-off events. For 113/175 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3648 event pairs, 6 based on Foata normal form. 1/706 useless extension candidates. Maximal degree in co-relation 860. Up to 56 conditions per place. [2022-07-21 08:53:14,918 INFO L132 encePairwiseOnDemand]: 422/425 looper letters, 17 selfloop transitions, 2 changer transitions 0/361 dead transitions. [2022-07-21 08:53:14,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 361 transitions, 814 flow [2022-07-21 08:53:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:53:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:53:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2022-07-21 08:53:14,920 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8203921568627451 [2022-07-21 08:53:14,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2022-07-21 08:53:14,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2022-07-21 08:53:14,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:14,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2022-07-21 08:53:14,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states 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 08:53:14,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 08:53:14,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states 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 08:53:14,923 INFO L186 Difference]: Start difference. First operand has 359 places, 357 transitions, 768 flow. Second operand 3 states and 1046 transitions. [2022-07-21 08:53:14,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 361 transitions, 814 flow [2022-07-21 08:53:14,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 361 transitions, 812 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:14,927 INFO L242 Difference]: Finished difference. Result has 361 places, 358 transitions, 778 flow [2022-07-21 08:53:14,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=778, PETRI_PLACES=361, PETRI_TRANSITIONS=358} [2022-07-21 08:53:14,928 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 0 predicate places. [2022-07-21 08:53:14,928 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 358 transitions, 778 flow [2022-07-21 08:53:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states 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 08:53:14,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:14,929 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:14,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-21 08:53:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 08:53:15,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1713893572, now seen corresponding path program 1 times [2022-07-21 08:53:15,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:15,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381711706] [2022-07-21 08:53:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:15,168 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 08:53:15,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381711706] [2022-07-21 08:53:15,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381711706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:15,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944221148] [2022-07-21 08:53:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:15,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:15,188 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:15,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 08:53:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:15,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:53:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:15,310 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 08:53:15,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:15,327 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 08:53:15,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944221148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:15,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:15,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:53:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366591143] [2022-07-21 08:53:15,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:15,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:53:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:53:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:53:15,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-07-21 08:53:15,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 358 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states 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 08:53:15,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:15,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-07-21 08:53:15,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:15,488 INFO L129 PetriNetUnfolder]: 29/752 cut-off events. [2022-07-21 08:53:15,488 INFO L130 PetriNetUnfolder]: For 124/139 co-relation queries the response was YES. [2022-07-21 08:53:15,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 752 events. 29/752 cut-off events. For 124/139 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3640 event pairs, 6 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 872. Up to 41 conditions per place. [2022-07-21 08:53:15,503 INFO L132 encePairwiseOnDemand]: 419/425 looper letters, 18 selfloop transitions, 9 changer transitions 0/368 dead transitions. [2022-07-21 08:53:15,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 368 transitions, 854 flow [2022-07-21 08:53:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:53:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:53:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3098 transitions. [2022-07-21 08:53:15,509 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8099346405228758 [2022-07-21 08:53:15,509 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3098 transitions. [2022-07-21 08:53:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3098 transitions. [2022-07-21 08:53:15,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:15,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3098 transitions. [2022-07-21 08:53:15,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 344.22222222222223) internal successors, (3098), 9 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states 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 08:53:15,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 08:53:15,516 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 425.0) internal successors, (4250), 10 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 08:53:15,516 INFO L186 Difference]: Start difference. First operand has 361 places, 358 transitions, 778 flow. Second operand 9 states and 3098 transitions. [2022-07-21 08:53:15,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 368 transitions, 854 flow [2022-07-21 08:53:15,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 368 transitions, 852 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:15,521 INFO L242 Difference]: Finished difference. Result has 371 places, 364 transitions, 826 flow [2022-07-21 08:53:15,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=371, PETRI_TRANSITIONS=364} [2022-07-21 08:53:15,522 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 10 predicate places. [2022-07-21 08:53:15,522 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 364 transitions, 826 flow [2022-07-21 08:53:15,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 343.1) internal successors, (3431), 10 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states 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 08:53:15,523 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:15,523 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:15,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 08:53:15,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -499580700, now seen corresponding path program 2 times [2022-07-21 08:53:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015708389] [2022-07-21 08:53:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 08:53:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015708389] [2022-07-21 08:53:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015708389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130567188] [2022-07-21 08:53:15,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:53:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:15,820 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:15,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 08:53:15,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:53:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:53:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:53:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:53:15,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:53:16,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130567188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:16,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:16,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-07-21 08:53:16,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141379252] [2022-07-21 08:53:16,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:16,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 08:53:16,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 08:53:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-21 08:53:16,060 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 425 [2022-07-21 08:53:16,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 364 transitions, 826 flow. Second operand has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states 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 08:53:16,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:16,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 425 [2022-07-21 08:53:16,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:16,357 INFO L129 PetriNetUnfolder]: 27/727 cut-off events. [2022-07-21 08:53:16,357 INFO L130 PetriNetUnfolder]: For 134/179 co-relation queries the response was YES. [2022-07-21 08:53:16,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 727 events. 27/727 cut-off events. For 134/179 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3309 event pairs, 7 based on Foata normal form. 6/699 useless extension candidates. Maximal degree in co-relation 939. Up to 56 conditions per place. [2022-07-21 08:53:16,372 INFO L132 encePairwiseOnDemand]: 414/425 looper letters, 37 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2022-07-21 08:53:16,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 396 transitions, 1078 flow [2022-07-21 08:53:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 08:53:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 08:53:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 8418 transitions. [2022-07-21 08:53:16,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922823529411764 [2022-07-21 08:53:16,379 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 8418 transitions. [2022-07-21 08:53:16,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 8418 transitions. [2022-07-21 08:53:16,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:16,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 8418 transitions. [2022-07-21 08:53:16,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 336.72) internal successors, (8418), 25 states have internal predecessors, (8418), 0 states have call successors, (0), 0 states 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 08:53:16,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states 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 08:53:16,395 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 425.0) internal successors, (11050), 26 states have internal predecessors, (11050), 0 states have call successors, (0), 0 states 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 08:53:16,395 INFO L186 Difference]: Start difference. First operand has 371 places, 364 transitions, 826 flow. Second operand 25 states and 8418 transitions. [2022-07-21 08:53:16,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 396 transitions, 1078 flow [2022-07-21 08:53:16,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 396 transitions, 1064 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-21 08:53:16,400 INFO L242 Difference]: Finished difference. Result has 402 places, 380 transitions, 984 flow [2022-07-21 08:53:16,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=984, PETRI_PLACES=402, PETRI_TRANSITIONS=380} [2022-07-21 08:53:16,401 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 41 predicate places. [2022-07-21 08:53:16,401 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 380 transitions, 984 flow [2022-07-21 08:53:16,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 337.05263157894734) internal successors, (6404), 19 states have internal predecessors, (6404), 0 states have call successors, (0), 0 states 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 08:53:16,402 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:16,402 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:16,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:16,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:16,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash 546551868, now seen corresponding path program 1 times [2022-07-21 08:53:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:16,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290312245] [2022-07-21 08:53:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:16,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290312245] [2022-07-21 08:53:16,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290312245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:53:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902677304] [2022-07-21 08:53:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:53:16,749 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:53:16,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 08:53:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:53:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:53:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:16,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:53:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:53:17,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902677304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:53:17,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:53:17,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-07-21 08:53:17,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407890603] [2022-07-21 08:53:17,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:53:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 08:53:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 08:53:17,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-07-21 08:53:17,015 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 425 [2022-07-21 08:53:17,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 380 transitions, 984 flow. Second operand has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states 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 08:53:17,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:17,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 425 [2022-07-21 08:53:17,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:53:17,382 INFO L129 PetriNetUnfolder]: 27/742 cut-off events. [2022-07-21 08:53:17,382 INFO L130 PetriNetUnfolder]: For 244/253 co-relation queries the response was YES. [2022-07-21 08:53:17,395 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 742 events. 27/742 cut-off events. For 244/253 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3314 event pairs, 7 based on Foata normal form. 3/711 useless extension candidates. Maximal degree in co-relation 1029. Up to 41 conditions per place. [2022-07-21 08:53:17,398 INFO L132 encePairwiseOnDemand]: 419/425 looper letters, 32 selfloop transitions, 30 changer transitions 0/406 dead transitions. [2022-07-21 08:53:17,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 406 transitions, 1254 flow [2022-07-21 08:53:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 08:53:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 08:53:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10295 transitions. [2022-07-21 08:53:17,406 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8074509803921569 [2022-07-21 08:53:17,406 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10295 transitions. [2022-07-21 08:53:17,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10295 transitions. [2022-07-21 08:53:17,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:53:17,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10295 transitions. [2022-07-21 08:53:17,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 343.1666666666667) internal successors, (10295), 30 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states 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 08:53:17,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states 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 08:53:17,425 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 425.0) internal successors, (13175), 31 states have internal predecessors, (13175), 0 states have call successors, (0), 0 states 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 08:53:17,425 INFO L186 Difference]: Start difference. First operand has 402 places, 380 transitions, 984 flow. Second operand 30 states and 10295 transitions. [2022-07-21 08:53:17,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 406 transitions, 1254 flow [2022-07-21 08:53:17,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 406 transitions, 1220 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-07-21 08:53:17,432 INFO L242 Difference]: Finished difference. Result has 428 places, 390 transitions, 1108 flow [2022-07-21 08:53:17,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1108, PETRI_PLACES=428, PETRI_TRANSITIONS=390} [2022-07-21 08:53:17,433 INFO L279 CegarLoopForPetriNet]: 361 programPoint places, 67 predicate places. [2022-07-21 08:53:17,434 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 390 transitions, 1108 flow [2022-07-21 08:53:17,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 343.4347826086956) internal successors, (7899), 23 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states 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 08:53:17,435 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:53:17,435 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:53:17,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 08:53:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:53:17,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-21 08:53:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:53:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash 961894633, now seen corresponding path program 2 times [2022-07-21 08:53:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:53:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044815512] [2022-07-21 08:53:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:53:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:53:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:53:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-21 08:53:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:53:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044815512] [2022-07-21 08:53:17,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044815512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:53:17,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:53:17,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-21 08:53:17,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788825032] [2022-07-21 08:53:17,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:53:17,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 08:53:17,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:53:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 08:53:17,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-21 08:53:17,972 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 425 [2022-07-21 08:53:17,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 390 transitions, 1108 flow. Second operand has 15 states, 15 states have (on average 284.0) internal successors, (4260), 15 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states 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 08:53:17,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:53:17,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 425 [2022-07-21 08:53:17,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand