./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:18:27,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:18:27,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:18:27,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:18:27,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:18:27,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:18:27,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:18:27,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:18:27,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:18:27,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:18:27,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:18:27,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:18:27,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:18:27,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:18:27,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:18:27,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:18:27,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:18:27,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:18:27,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:18:27,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:18:27,146 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:18:27,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:18:27,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:18:27,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:18:27,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:18:27,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:18:27,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:18:27,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:18:27,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:18:27,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:18:27,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:18:27,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:18:27,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:18:27,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:18:27,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:18:27,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:18:27,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:18:27,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:18:27,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:18:27,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:18:27,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:18:27,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:18:27,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:18:27,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:18:27,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:18:27,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:18:27,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:18:27,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:18:27,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:18:27,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:18:27,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:18:27,197 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:18:27,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:18:27,198 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:18:27,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:18:27,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:18:27,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:18:27,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:18:27,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:18:27,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:18:27,199 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:18:27,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:18:27,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:18:27,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:18:27,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:18:27,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:18:27,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:18:27,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:27,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:18:27,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:18:27,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:18:27,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:18:27,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:18:27,203 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:18:27,203 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:18:27,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:18:27,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2022-07-19 21:18:27,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:18:27,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:18:27,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:18:27,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:18:27,470 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:18:27,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-07-19 21:18:27,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/502c7a864/dd1be234f05d4a1c9796472c711c5387/FLAG85cb8528d [2022-07-19 21:18:28,054 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:18:28,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-07-19 21:18:28,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/502c7a864/dd1be234f05d4a1c9796472c711c5387/FLAG85cb8528d [2022-07-19 21:18:28,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/502c7a864/dd1be234f05d4a1c9796472c711c5387 [2022-07-19 21:18:28,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:18:28,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:18:28,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:28,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:18:28,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:18:28,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6533b7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28, skipping insertion in model container [2022-07-19 21:18:28,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:18:28,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:18:28,722 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_24-sound_lock_racing.i[30176,30189] [2022-07-19 21:18:28,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:28,761 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:18:28,794 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_24-sound_lock_racing.i[30176,30189] [2022-07-19 21:18:28,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:18:28,850 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:18:28,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28 WrapperNode [2022-07-19 21:18:28,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:18:28,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:28,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:18:28,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:18:28,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,902 INFO L137 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-07-19 21:18:28,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:18:28,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:18:28,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:18:28,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:18:28,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:18:28,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:18:28,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:18:28,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:18:28,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (1/1) ... [2022-07-19 21:18:28,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:18:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:28,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:18:28,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:18:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:18:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:18:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:18:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:18:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:18:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-19 21:18:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-19 21:18:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:18:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:18:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:18:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:18:29,013 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:18:29,103 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:18:29,105 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:18:29,372 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:18:29,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:18:29,379 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-19 21:18:29,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:29 BoogieIcfgContainer [2022-07-19 21:18:29,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:18:29,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:18:29,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:18:29,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:18:29,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:18:28" (1/3) ... [2022-07-19 21:18:29,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cee2746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:29, skipping insertion in model container [2022-07-19 21:18:29,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:18:28" (2/3) ... [2022-07-19 21:18:29,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cee2746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:18:29, skipping insertion in model container [2022-07-19 21:18:29,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:18:29" (3/3) ... [2022-07-19 21:18:29,390 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2022-07-19 21:18:29,395 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:18:29,403 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:18:29,404 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:18:29,404 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:18:29,484 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:18:29,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 109 places, 119 transitions, 246 flow [2022-07-19 21:18:29,614 INFO L129 PetriNetUnfolder]: 18/155 cut-off events. [2022-07-19 21:18:29,614 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:18:29,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 155 events. 18/155 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 336 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-07-19 21:18:29,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 119 transitions, 246 flow [2022-07-19 21:18:29,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 114 transitions, 233 flow [2022-07-19 21:18:29,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:29,647 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@10470366, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41dc0631 [2022-07-19 21:18:29,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:29,678 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2022-07-19 21:18:29,679 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:29,680 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:29,681 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] [2022-07-19 21:18:29,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -903339966, now seen corresponding path program 1 times [2022-07-19 21:18:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:29,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385660109] [2022-07-19 21:18:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:29,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:29,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385660109] [2022-07-19 21:18:29,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385660109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:29,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:29,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:29,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562706434] [2022-07-19 21:18:29,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:29,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:30,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:30,007 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 119 [2022-07-19 21:18:30,012 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 119 [2022-07-19 21:18:30,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,066 INFO L129 PetriNetUnfolder]: 1/106 cut-off events. [2022-07-19 21:18:30,067 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:30,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 106 events. 1/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 22/124 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2022-07-19 21:18:30,069 INFO L132 encePairwiseOnDemand]: 105/119 looper letters, 8 selfloop transitions, 2 changer transitions 15/104 dead transitions. [2022-07-19 21:18:30,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 104 transitions, 233 flow [2022-07-19 21:18:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2022-07-19 21:18:30,091 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2022-07-19 21:18:30,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2022-07-19 21:18:30,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2022-07-19 21:18:30,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2022-07-19 21:18:30,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,114 INFO L186 Difference]: Start difference. First operand has 105 places, 114 transitions, 233 flow. Second operand 3 states and 323 transitions. [2022-07-19 21:18:30,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 104 transitions, 233 flow [2022-07-19 21:18:30,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 104 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:30,122 INFO L242 Difference]: Finished difference. Result has 107 places, 87 transitions, 187 flow [2022-07-19 21:18:30,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=107, PETRI_TRANSITIONS=87} [2022-07-19 21:18:30,128 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 2 predicate places. [2022-07-19 21:18:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 87 transitions, 187 flow [2022-07-19 21:18:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,130 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, 1] [2022-07-19 21:18:30,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:18:30,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2133244280, now seen corresponding path program 1 times [2022-07-19 21:18:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039562236] [2022-07-19 21:18:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:30,176 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:30,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:30,218 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:30,220 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:30,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:30,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:18:30,222 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:18:30,224 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:30,224 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:18:30,242 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:18:30,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 134 places, 149 transitions, 316 flow [2022-07-19 21:18:30,274 INFO L129 PetriNetUnfolder]: 32/246 cut-off events. [2022-07-19 21:18:30,274 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:30,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 32/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 681 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 157. Up to 8 conditions per place. [2022-07-19 21:18:30,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 149 transitions, 316 flow [2022-07-19 21:18:30,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 149 transitions, 316 flow [2022-07-19 21:18:30,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:30,281 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@10470366, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41dc0631 [2022-07-19 21:18:30,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:30,290 INFO L129 PetriNetUnfolder]: 6/92 cut-off events. [2022-07-19 21:18:30,291 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:30,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,291 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] [2022-07-19 21:18:30,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,292 INFO L85 PathProgramCache]: Analyzing trace with hash -731562878, now seen corresponding path program 1 times [2022-07-19 21:18:30,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215881529] [2022-07-19 21:18:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215881529] [2022-07-19 21:18:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215881529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:30,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:30,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:30,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877475796] [2022-07-19 21:18:30,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:30,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:30,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 149 [2022-07-19 21:18:30,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 149 [2022-07-19 21:18:30,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,435 INFO L129 PetriNetUnfolder]: 3/198 cut-off events. [2022-07-19 21:18:30,435 INFO L130 PetriNetUnfolder]: For 20/31 co-relation queries the response was YES. [2022-07-19 21:18:30,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 198 events. 3/198 cut-off events. For 20/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 407 event pairs, 0 based on Foata normal form. 78/267 useless extension candidates. Maximal degree in co-relation 133. Up to 16 conditions per place. [2022-07-19 21:18:30,439 INFO L132 encePairwiseOnDemand]: 129/149 looper letters, 11 selfloop transitions, 2 changer transitions 21/135 dead transitions. [2022-07-19 21:18:30,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 135 transitions, 318 flow [2022-07-19 21:18:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2022-07-19 21:18:30,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8948545861297539 [2022-07-19 21:18:30,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2022-07-19 21:18:30,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2022-07-19 21:18:30,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2022-07-19 21:18:30,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,448 INFO L186 Difference]: Start difference. First operand has 134 places, 149 transitions, 316 flow. Second operand 3 states and 400 transitions. [2022-07-19 21:18:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 135 transitions, 318 flow [2022-07-19 21:18:30,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 135 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:30,455 INFO L242 Difference]: Finished difference. Result has 136 places, 111 transitions, 244 flow [2022-07-19 21:18:30,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=136, PETRI_TRANSITIONS=111} [2022-07-19 21:18:30,456 INFO L279 CegarLoopForPetriNet]: 134 programPoint places, 2 predicate places. [2022-07-19 21:18:30,457 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 111 transitions, 244 flow [2022-07-19 21:18:30,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,457 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,458 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] [2022-07-19 21:18:30,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:18:30,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash -504268380, now seen corresponding path program 1 times [2022-07-19 21:18:30,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929753214] [2022-07-19 21:18:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:30,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929753214] [2022-07-19 21:18:30,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929753214] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:30,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141549894] [2022-07-19 21:18:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:30,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:30,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:30,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:18:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:30,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141549894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:30,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:30,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277824791] [2022-07-19 21:18:30,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:30,854 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 149 [2022-07-19 21:18:30,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 111 transitions, 244 flow. Second operand has 10 states, 10 states have (on average 121.3) internal successors, (1213), 10 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:30,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 149 [2022-07-19 21:18:30,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:30,934 INFO L129 PetriNetUnfolder]: 1/112 cut-off events. [2022-07-19 21:18:30,935 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:30,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 112 events. 1/112 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2022-07-19 21:18:30,936 INFO L132 encePairwiseOnDemand]: 144/149 looper letters, 9 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2022-07-19 21:18:30,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 106 transitions, 264 flow [2022-07-19 21:18:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1089 transitions. [2022-07-19 21:18:30,940 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8120805369127517 [2022-07-19 21:18:30,940 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1089 transitions. [2022-07-19 21:18:30,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1089 transitions. [2022-07-19 21:18:30,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:30,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1089 transitions. [2022-07-19 21:18:30,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.0) internal successors, (1089), 9 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 149.0) internal successors, (1490), 10 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,947 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 149.0) internal successors, (1490), 10 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,947 INFO L186 Difference]: Start difference. First operand has 136 places, 111 transitions, 244 flow. Second operand 9 states and 1089 transitions. [2022-07-19 21:18:30,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 106 transitions, 264 flow [2022-07-19 21:18:30,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 106 transitions, 260 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:30,954 INFO L242 Difference]: Finished difference. Result has 113 places, 102 transitions, 234 flow [2022-07-19 21:18:30,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=234, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2022-07-19 21:18:30,957 INFO L279 CegarLoopForPetriNet]: 134 programPoint places, -21 predicate places. [2022-07-19 21:18:30,957 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 234 flow [2022-07-19 21:18:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.3) internal successors, (1213), 10 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:30,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:30,961 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, 1] [2022-07-19 21:18:30,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:31,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1440832547, now seen corresponding path program 1 times [2022-07-19 21:18:31,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733407915] [2022-07-19 21:18:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:31,210 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:31,236 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:31,236 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:31,236 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:31,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:31,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:18:31,237 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:18:31,238 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:31,238 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:18:31,280 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:18:31,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 159 places, 179 transitions, 388 flow [2022-07-19 21:18:31,333 INFO L129 PetriNetUnfolder]: 51/370 cut-off events. [2022-07-19 21:18:31,334 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:18:31,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 51/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1172 event pairs, 1 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2022-07-19 21:18:31,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 179 transitions, 388 flow [2022-07-19 21:18:31,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 179 transitions, 388 flow [2022-07-19 21:18:31,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:31,342 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@10470366, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41dc0631 [2022-07-19 21:18:31,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:31,347 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-19 21:18:31,347 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:31,348 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,348 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] [2022-07-19 21:18:31,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash -688367743, now seen corresponding path program 1 times [2022-07-19 21:18:31,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767533211] [2022-07-19 21:18:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767533211] [2022-07-19 21:18:31,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767533211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:31,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:31,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:31,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329602068] [2022-07-19 21:18:31,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:31,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:31,372 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 179 [2022-07-19 21:18:31,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 179 transitions, 388 flow. Second operand has 2 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 179 [2022-07-19 21:18:31,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,424 INFO L129 PetriNetUnfolder]: 9/324 cut-off events. [2022-07-19 21:18:31,424 INFO L130 PetriNetUnfolder]: For 54/68 co-relation queries the response was YES. [2022-07-19 21:18:31,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 324 events. 9/324 cut-off events. For 54/68 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 982 event pairs, 1 based on Foata normal form. 106/413 useless extension candidates. Maximal degree in co-relation 229. Up to 16 conditions per place. [2022-07-19 21:18:31,427 INFO L132 encePairwiseOnDemand]: 156/179 looper letters, 3 selfloop transitions, 0 changer transitions 22/155 dead transitions. [2022-07-19 21:18:31,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 155 transitions, 352 flow [2022-07-19 21:18:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 327 transitions. [2022-07-19 21:18:31,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9134078212290503 [2022-07-19 21:18:31,429 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 327 transitions. [2022-07-19 21:18:31,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 327 transitions. [2022-07-19 21:18:31,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 327 transitions. [2022-07-19 21:18:31,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,431 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,431 INFO L186 Difference]: Start difference. First operand has 159 places, 179 transitions, 388 flow. Second operand 2 states and 327 transitions. [2022-07-19 21:18:31,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 155 transitions, 352 flow [2022-07-19 21:18:31,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 155 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:31,435 INFO L242 Difference]: Finished difference. Result has 159 places, 133 transitions, 287 flow [2022-07-19 21:18:31,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=287, PETRI_PLACES=159, PETRI_TRANSITIONS=133} [2022-07-19 21:18:31,436 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, 0 predicate places. [2022-07-19 21:18:31,436 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 133 transitions, 287 flow [2022-07-19 21:18:31,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,437 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] [2022-07-19 21:18:31,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:18:31,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1809648194, now seen corresponding path program 1 times [2022-07-19 21:18:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666584716] [2022-07-19 21:18:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666584716] [2022-07-19 21:18:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666584716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:31,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:31,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471834283] [2022-07-19 21:18:31,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:31,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:31,476 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 179 [2022-07-19 21:18:31,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 133 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 179 [2022-07-19 21:18:31,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,545 INFO L129 PetriNetUnfolder]: 1/177 cut-off events. [2022-07-19 21:18:31,545 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:18:31,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 177 events. 1/177 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 331 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 211. Up to 18 conditions per place. [2022-07-19 21:18:31,546 INFO L132 encePairwiseOnDemand]: 176/179 looper letters, 12 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2022-07-19 21:18:31,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 137 transitions, 323 flow [2022-07-19 21:18:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-07-19 21:18:31,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8212290502793296 [2022-07-19 21:18:31,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-07-19 21:18:31,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-07-19 21:18:31,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-07-19 21:18:31,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,553 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,553 INFO L186 Difference]: Start difference. First operand has 159 places, 133 transitions, 287 flow. Second operand 3 states and 441 transitions. [2022-07-19 21:18:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 137 transitions, 323 flow [2022-07-19 21:18:31,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 137 transitions, 317 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:31,557 INFO L242 Difference]: Finished difference. Result has 143 places, 134 transitions, 293 flow [2022-07-19 21:18:31,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=143, PETRI_TRANSITIONS=134} [2022-07-19 21:18:31,558 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, -16 predicate places. [2022-07-19 21:18:31,558 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 134 transitions, 293 flow [2022-07-19 21:18:31,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,559 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] [2022-07-19 21:18:31,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:18:31,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash -936714400, now seen corresponding path program 1 times [2022-07-19 21:18:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:31,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610842785] [2022-07-19 21:18:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610842785] [2022-07-19 21:18:31,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610842785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387123097] [2022-07-19 21:18:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:31,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:31,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:31,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:18:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:31,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387123097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:31,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:31,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128202084] [2022-07-19 21:18:31,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:31,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:31,770 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 179 [2022-07-19 21:18:31,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 134 transitions, 293 flow. Second operand has 10 states, 10 states have (on average 143.3) internal successors, (1433), 10 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:31,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 179 [2022-07-19 21:18:31,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:31,849 INFO L129 PetriNetUnfolder]: 1/155 cut-off events. [2022-07-19 21:18:31,849 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-19 21:18:31,850 INFO L84 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 155 events. 1/155 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 193. Up to 7 conditions per place. [2022-07-19 21:18:31,850 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 13 selfloop transitions, 9 changer transitions 0/144 dead transitions. [2022-07-19 21:18:31,850 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 144 transitions, 359 flow [2022-07-19 21:18:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:31,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1293 transitions. [2022-07-19 21:18:31,853 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8026070763500931 [2022-07-19 21:18:31,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1293 transitions. [2022-07-19 21:18:31,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1293 transitions. [2022-07-19 21:18:31,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:31,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1293 transitions. [2022-07-19 21:18:31,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,860 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,861 INFO L186 Difference]: Start difference. First operand has 143 places, 134 transitions, 293 flow. Second operand 9 states and 1293 transitions. [2022-07-19 21:18:31,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 144 transitions, 359 flow [2022-07-19 21:18:31,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 144 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:31,864 INFO L242 Difference]: Finished difference. Result has 153 places, 140 transitions, 341 flow [2022-07-19 21:18:31,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=341, PETRI_PLACES=153, PETRI_TRANSITIONS=140} [2022-07-19 21:18:31,865 INFO L279 CegarLoopForPetriNet]: 159 programPoint places, -6 predicate places. [2022-07-19 21:18:31,865 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 140 transitions, 341 flow [2022-07-19 21:18:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.3) internal successors, (1433), 10 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:31,866 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:31,866 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:31,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:32,080 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,SelfDestructingSolverStorable7 [2022-07-19 21:18:32,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1689933495, now seen corresponding path program 1 times [2022-07-19 21:18:32,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797176476] [2022-07-19 21:18:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:32,101 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:32,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:32,122 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:32,122 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:32,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:32,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:18:32,122 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:18:32,123 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:32,123 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:18:32,144 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:18:32,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 184 places, 209 transitions, 462 flow [2022-07-19 21:18:32,246 INFO L129 PetriNetUnfolder]: 82/562 cut-off events. [2022-07-19 21:18:32,246 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:18:32,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 562 events. 82/562 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2103 event pairs, 6 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-07-19 21:18:32,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 209 transitions, 462 flow [2022-07-19 21:18:32,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 209 transitions, 462 flow [2022-07-19 21:18:32,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:32,263 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@10470366, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41dc0631 [2022-07-19 21:18:32,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:32,269 INFO L129 PetriNetUnfolder]: 7/95 cut-off events. [2022-07-19 21:18:32,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:32,270 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,270 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] [2022-07-19 21:18:32,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash -72689983, now seen corresponding path program 1 times [2022-07-19 21:18:32,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507140496] [2022-07-19 21:18:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507140496] [2022-07-19 21:18:32,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507140496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:32,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:32,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:18:32,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387372144] [2022-07-19 21:18:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:18:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:18:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:18:32,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 209 [2022-07-19 21:18:32,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 209 transitions, 462 flow. Second operand has 2 states, 2 states have (on average 171.5) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 209 [2022-07-19 21:18:32,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,401 INFO L129 PetriNetUnfolder]: 22/497 cut-off events. [2022-07-19 21:18:32,401 INFO L130 PetriNetUnfolder]: For 123/135 co-relation queries the response was YES. [2022-07-19 21:18:32,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 497 events. 22/497 cut-off events. For 123/135 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1894 event pairs, 6 based on Foata normal form. 252/722 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-07-19 21:18:32,406 INFO L132 encePairwiseOnDemand]: 180/209 looper letters, 4 selfloop transitions, 0 changer transitions 23/179 dead transitions. [2022-07-19 21:18:32,406 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 418 flow [2022-07-19 21:18:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:18:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:18:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 379 transitions. [2022-07-19 21:18:32,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9066985645933014 [2022-07-19 21:18:32,408 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 379 transitions. [2022-07-19 21:18:32,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 379 transitions. [2022-07-19 21:18:32,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 379 transitions. [2022-07-19 21:18:32,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,411 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,411 INFO L186 Difference]: Start difference. First operand has 184 places, 209 transitions, 462 flow. Second operand 2 states and 379 transitions. [2022-07-19 21:18:32,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 418 flow [2022-07-19 21:18:32,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 179 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:32,415 INFO L242 Difference]: Finished difference. Result has 184 places, 156 transitions, 344 flow [2022-07-19 21:18:32,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=184, PETRI_TRANSITIONS=156} [2022-07-19 21:18:32,417 INFO L279 CegarLoopForPetriNet]: 184 programPoint places, 0 predicate places. [2022-07-19 21:18:32,417 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 156 transitions, 344 flow [2022-07-19 21:18:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 171.5) internal successors, (343), 2 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,417 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,418 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] [2022-07-19 21:18:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:18:32,418 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1869641342, now seen corresponding path program 1 times [2022-07-19 21:18:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137564242] [2022-07-19 21:18:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137564242] [2022-07-19 21:18:32,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137564242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:32,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:32,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:32,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522231078] [2022-07-19 21:18:32,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:32,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:32,445 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 209 [2022-07-19 21:18:32,446 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 156 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,446 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,446 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 209 [2022-07-19 21:18:32,446 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,503 INFO L129 PetriNetUnfolder]: 1/220 cut-off events. [2022-07-19 21:18:32,503 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:18:32,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 220 events. 1/220 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 474 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 266. Up to 24 conditions per place. [2022-07-19 21:18:32,504 INFO L132 encePairwiseOnDemand]: 206/209 looper letters, 13 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2022-07-19 21:18:32,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 160 transitions, 382 flow [2022-07-19 21:18:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2022-07-19 21:18:32,506 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.810207336523126 [2022-07-19 21:18:32,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2022-07-19 21:18:32,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2022-07-19 21:18:32,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2022-07-19 21:18:32,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,510 INFO L186 Difference]: Start difference. First operand has 184 places, 156 transitions, 344 flow. Second operand 3 states and 508 transitions. [2022-07-19 21:18:32,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 160 transitions, 382 flow [2022-07-19 21:18:32,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 160 transitions, 370 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:32,513 INFO L242 Difference]: Finished difference. Result has 168 places, 157 transitions, 344 flow [2022-07-19 21:18:32,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=168, PETRI_TRANSITIONS=157} [2022-07-19 21:18:32,514 INFO L279 CegarLoopForPetriNet]: 184 programPoint places, -16 predicate places. [2022-07-19 21:18:32,514 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 157 transitions, 344 flow [2022-07-19 21:18:32,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,515 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,515 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] [2022-07-19 21:18:32,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:18:32,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1577858724, now seen corresponding path program 1 times [2022-07-19 21:18:32,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112331070] [2022-07-19 21:18:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:32,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112331070] [2022-07-19 21:18:32,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112331070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135624048] [2022-07-19 21:18:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:32,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:32,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:32,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:18:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:32,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135624048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:32,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:32,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:32,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278290695] [2022-07-19 21:18:32,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:32,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:32,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:32,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 209 [2022-07-19 21:18:32,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 157 transitions, 344 flow. Second operand has 10 states, 10 states have (on average 165.3) internal successors, (1653), 10 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:32,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 209 [2022-07-19 21:18:32,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:32,800 INFO L129 PetriNetUnfolder]: 1/198 cut-off events. [2022-07-19 21:18:32,801 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:18:32,801 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 198 events. 1/198 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 349 event pairs, 0 based on Foata normal form. 2/199 useless extension candidates. Maximal degree in co-relation 248. Up to 11 conditions per place. [2022-07-19 21:18:32,802 INFO L132 encePairwiseOnDemand]: 203/209 looper letters, 14 selfloop transitions, 9 changer transitions 0/167 dead transitions. [2022-07-19 21:18:32,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 167 transitions, 412 flow [2022-07-19 21:18:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:32,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1492 transitions. [2022-07-19 21:18:32,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931951089845827 [2022-07-19 21:18:32,806 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1492 transitions. [2022-07-19 21:18:32,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1492 transitions. [2022-07-19 21:18:32,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:32,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1492 transitions. [2022-07-19 21:18:32,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 165.77777777777777) internal successors, (1492), 9 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 209.0) internal successors, (2090), 10 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,816 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 209.0) internal successors, (2090), 10 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,817 INFO L186 Difference]: Start difference. First operand has 168 places, 157 transitions, 344 flow. Second operand 9 states and 1492 transitions. [2022-07-19 21:18:32,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 167 transitions, 412 flow [2022-07-19 21:18:32,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 167 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:32,821 INFO L242 Difference]: Finished difference. Result has 178 places, 163 transitions, 392 flow [2022-07-19 21:18:32,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=178, PETRI_TRANSITIONS=163} [2022-07-19 21:18:32,823 INFO L279 CegarLoopForPetriNet]: 184 programPoint places, -6 predicate places. [2022-07-19 21:18:32,824 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 163 transitions, 392 flow [2022-07-19 21:18:32,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.3) internal successors, (1653), 10 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:32,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:32,826 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:18:32,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:33,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:33,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash 164240467, now seen corresponding path program 1 times [2022-07-19 21:18:33,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214873992] [2022-07-19 21:18:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:33,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:18:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214873992] [2022-07-19 21:18:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214873992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:33,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:33,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:18:33,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316478991] [2022-07-19 21:18:33,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:18:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:18:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:18:33,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 209 [2022-07-19 21:18:33,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 163 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:33,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:33,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 209 [2022-07-19 21:18:33,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:39,139 INFO L129 PetriNetUnfolder]: 16743/41410 cut-off events. [2022-07-19 21:18:39,139 INFO L130 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-07-19 21:18:39,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64827 conditions, 41410 events. 16743/41410 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 493206 event pairs, 10951 based on Foata normal form. 750/41598 useless extension candidates. Maximal degree in co-relation 64816. Up to 14189 conditions per place. [2022-07-19 21:18:39,580 INFO L132 encePairwiseOnDemand]: 201/209 looper letters, 31 selfloop transitions, 5 changer transitions 53/227 dead transitions. [2022-07-19 21:18:39,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 227 transitions, 713 flow [2022-07-19 21:18:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:18:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:18:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1134 transitions. [2022-07-19 21:18:39,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7751196172248804 [2022-07-19 21:18:39,584 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1134 transitions. [2022-07-19 21:18:39,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1134 transitions. [2022-07-19 21:18:39,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:39,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1134 transitions. [2022-07-19 21:18:39,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,591 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 209.0) internal successors, (1672), 8 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,591 INFO L186 Difference]: Start difference. First operand has 178 places, 163 transitions, 392 flow. Second operand 7 states and 1134 transitions. [2022-07-19 21:18:39,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 227 transitions, 713 flow [2022-07-19 21:18:39,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 227 transitions, 707 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:39,599 INFO L242 Difference]: Finished difference. Result has 188 places, 167 transitions, 443 flow [2022-07-19 21:18:39,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=188, PETRI_TRANSITIONS=167} [2022-07-19 21:18:39,600 INFO L279 CegarLoopForPetriNet]: 184 programPoint places, 4 predicate places. [2022-07-19 21:18:39,600 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 167 transitions, 443 flow [2022-07-19 21:18:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,601 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:18:39,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:18:39,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2101227452, now seen corresponding path program 1 times [2022-07-19 21:18:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006412688] [2022-07-19 21:18:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:39,633 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:18:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:18:39,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:18:39,669 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:18:39,669 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:18:39,670 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:18:39,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:18:39,670 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:18:39,671 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:18:39,672 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:18:39,698 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 21:18:39,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 209 places, 239 transitions, 538 flow [2022-07-19 21:18:39,808 INFO L129 PetriNetUnfolder]: 141/894 cut-off events. [2022-07-19 21:18:39,808 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 21:18:39,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 894 events. 141/894 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4030 event pairs, 23 based on Foata normal form. 0/763 useless extension candidates. Maximal degree in co-relation 607. Up to 80 conditions per place. [2022-07-19 21:18:39,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 239 transitions, 538 flow [2022-07-19 21:18:39,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 239 transitions, 538 flow [2022-07-19 21:18:39,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:18:39,830 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@10470366, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41dc0631 [2022-07-19 21:18:39,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:18:39,834 INFO L129 PetriNetUnfolder]: 5/88 cut-off events. [2022-07-19 21:18:39,834 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:18:39,834 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:39,834 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] [2022-07-19 21:18:39,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1115470402, now seen corresponding path program 1 times [2022-07-19 21:18:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:39,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219355664] [2022-07-19 21:18:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:39,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219355664] [2022-07-19 21:18:39,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219355664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:39,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:39,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:18:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081624220] [2022-07-19 21:18:39,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:39,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:18:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:18:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:18:39,870 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 239 [2022-07-19 21:18:39,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 239 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:39,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:39,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 239 [2022-07-19 21:18:39,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:40,010 INFO L129 PetriNetUnfolder]: 54/785 cut-off events. [2022-07-19 21:18:40,011 INFO L130 PetriNetUnfolder]: For 294/389 co-relation queries the response was YES. [2022-07-19 21:18:40,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 785 events. 54/785 cut-off events. For 294/389 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3641 event pairs, 23 based on Foata normal form. 880/1622 useless extension candidates. Maximal degree in co-relation 585. Up to 110 conditions per place. [2022-07-19 21:18:40,017 INFO L132 encePairwiseOnDemand]: 201/239 looper letters, 14 selfloop transitions, 2 changer transitions 24/207 dead transitions. [2022-07-19 21:18:40,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 207 transitions, 516 flow [2022-07-19 21:18:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:18:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:18:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-07-19 21:18:40,020 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8675034867503487 [2022-07-19 21:18:40,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-07-19 21:18:40,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-07-19 21:18:40,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:40,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-07-19 21:18:40,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,024 INFO L186 Difference]: Start difference. First operand has 209 places, 239 transitions, 538 flow. Second operand 3 states and 622 transitions. [2022-07-19 21:18:40,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 207 transitions, 516 flow [2022-07-19 21:18:40,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 207 transitions, 516 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:18:40,032 INFO L242 Difference]: Finished difference. Result has 211 places, 180 transitions, 415 flow [2022-07-19 21:18:40,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=211, PETRI_TRANSITIONS=180} [2022-07-19 21:18:40,033 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 2 predicate places. [2022-07-19 21:18:40,033 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 180 transitions, 415 flow [2022-07-19 21:18:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,034 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:40,034 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] [2022-07-19 21:18:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:18:40,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1867265944, now seen corresponding path program 1 times [2022-07-19 21:18:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428286896] [2022-07-19 21:18:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428286896] [2022-07-19 21:18:40,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428286896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:18:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482731800] [2022-07-19 21:18:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:18:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:18:40,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:18:40,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:18:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:18:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:18:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:18:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:18:40,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482731800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:18:40,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:18:40,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:18:40,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985784769] [2022-07-19 21:18:40,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:18:40,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:18:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:18:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:18:40,247 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 239 [2022-07-19 21:18:40,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 180 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 187.3) internal successors, (1873), 10 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:40,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 239 [2022-07-19 21:18:40,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:18:40,346 INFO L129 PetriNetUnfolder]: 1/241 cut-off events. [2022-07-19 21:18:40,346 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-19 21:18:40,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 241 events. 1/241 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 489 event pairs, 0 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 249. Up to 15 conditions per place. [2022-07-19 21:18:40,347 INFO L132 encePairwiseOnDemand]: 233/239 looper letters, 15 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2022-07-19 21:18:40,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 190 transitions, 485 flow [2022-07-19 21:18:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:18:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:18:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1691 transitions. [2022-07-19 21:18:40,352 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7861459786145979 [2022-07-19 21:18:40,352 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1691 transitions. [2022-07-19 21:18:40,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1691 transitions. [2022-07-19 21:18:40,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:18:40,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1691 transitions. [2022-07-19 21:18:40,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 187.88888888888889) internal successors, (1691), 9 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 239.0) internal successors, (2390), 10 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,363 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 239.0) internal successors, (2390), 10 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,363 INFO L186 Difference]: Start difference. First operand has 211 places, 180 transitions, 415 flow. Second operand 9 states and 1691 transitions. [2022-07-19 21:18:40,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 190 transitions, 485 flow [2022-07-19 21:18:40,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 190 transitions, 463 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-07-19 21:18:40,369 INFO L242 Difference]: Finished difference. Result has 202 places, 186 transitions, 443 flow [2022-07-19 21:18:40,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=443, PETRI_PLACES=202, PETRI_TRANSITIONS=186} [2022-07-19 21:18:40,370 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -7 predicate places. [2022-07-19 21:18:40,370 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 186 transitions, 443 flow [2022-07-19 21:18:40,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 187.3) internal successors, (1873), 10 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,371 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:18:40,371 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:18:40,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:18:40,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:18:40,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:18:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:18:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1252902023, now seen corresponding path program 1 times [2022-07-19 21:18:40,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:18:40,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127515761] [2022-07-19 21:18:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:18:40,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:18:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:18:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:18:40,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:18:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127515761] [2022-07-19 21:18:40,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127515761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:18:40,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:18:40,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:18:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636768269] [2022-07-19 21:18:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:18:40,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:18:40,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:18:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:18:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:18:40,767 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 239 [2022-07-19 21:18:40,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 186 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:18:40,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:18:40,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 239 [2022-07-19 21:18:40,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:09,613 INFO L129 PetriNetUnfolder]: 110510/244948 cut-off events. [2022-07-19 21:19:09,616 INFO L130 PetriNetUnfolder]: For 2554/2554 co-relation queries the response was YES. [2022-07-19 21:19:11,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389205 conditions, 244948 events. 110510/244948 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 8950. Compared 3343646 event pairs, 76730 based on Foata normal form. 3875/246561 useless extension candidates. Maximal degree in co-relation 247676. Up to 88950 conditions per place. [2022-07-19 21:19:12,819 INFO L132 encePairwiseOnDemand]: 230/239 looper letters, 38 selfloop transitions, 6 changer transitions 65/265 dead transitions. [2022-07-19 21:19:12,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 265 transitions, 839 flow [2022-07-19 21:19:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:19:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:19:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1280 transitions. [2022-07-19 21:19:12,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7650926479378363 [2022-07-19 21:19:12,823 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1280 transitions. [2022-07-19 21:19:12,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1280 transitions. [2022-07-19 21:19:12,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:12,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1280 transitions. [2022-07-19 21:19:12,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 182.85714285714286) internal successors, (1280), 7 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 239.0) internal successors, (1912), 8 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,832 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 239.0) internal successors, (1912), 8 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,832 INFO L186 Difference]: Start difference. First operand has 202 places, 186 transitions, 443 flow. Second operand 7 states and 1280 transitions. [2022-07-19 21:19:12,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 265 transitions, 839 flow [2022-07-19 21:19:12,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 833 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:12,842 INFO L242 Difference]: Finished difference. Result has 212 places, 191 transitions, 505 flow [2022-07-19 21:19:12,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=212, PETRI_TRANSITIONS=191} [2022-07-19 21:19:12,843 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, 3 predicate places. [2022-07-19 21:19:12,844 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 191 transitions, 505 flow [2022-07-19 21:19:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:12,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:12,845 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1] [2022-07-19 21:19:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:19:12,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1053149041, now seen corresponding path program 1 times [2022-07-19 21:19:12,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:12,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895802656] [2022-07-19 21:19:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:12,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:12,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895802656] [2022-07-19 21:19:12,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895802656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:12,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132364486] [2022-07-19 21:19:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:12,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:12,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:12,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:19:12,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:19:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:19:13,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:13,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:13,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132364486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:13,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:13,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:19:13,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791065932] [2022-07-19 21:19:13,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:13,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:19:13,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:13,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:19:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:19:13,167 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 239 [2022-07-19 21:19:13,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 191 transitions, 505 flow. Second operand has 18 states, 18 states have (on average 187.61111111111111) internal successors, (3377), 18 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:13,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 239 [2022-07-19 21:19:13,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:13,391 INFO L129 PetriNetUnfolder]: 50/647 cut-off events. [2022-07-19 21:19:13,391 INFO L130 PetriNetUnfolder]: For 115/311 co-relation queries the response was YES. [2022-07-19 21:19:13,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 647 events. 50/647 cut-off events. For 115/311 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3379 event pairs, 23 based on Foata normal form. 3/632 useless extension candidates. Maximal degree in co-relation 963. Up to 81 conditions per place. [2022-07-19 21:19:13,402 INFO L132 encePairwiseOnDemand]: 234/239 looper letters, 18 selfloop transitions, 16 changer transitions 0/195 dead transitions. [2022-07-19 21:19:13,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 195 transitions, 593 flow [2022-07-19 21:19:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:19:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:19:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3367 transitions. [2022-07-19 21:19:13,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7826592282659228 [2022-07-19 21:19:13,411 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3367 transitions. [2022-07-19 21:19:13,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3367 transitions. [2022-07-19 21:19:13,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:13,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3367 transitions. [2022-07-19 21:19:13,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 187.05555555555554) internal successors, (3367), 18 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 239.0) internal successors, (4541), 19 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,430 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 239.0) internal successors, (4541), 19 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,431 INFO L186 Difference]: Start difference. First operand has 212 places, 191 transitions, 505 flow. Second operand 18 states and 3367 transitions. [2022-07-19 21:19:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 195 transitions, 593 flow [2022-07-19 21:19:13,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 195 transitions, 556 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-07-19 21:19:13,435 INFO L242 Difference]: Finished difference. Result has 208 places, 186 transitions, 492 flow [2022-07-19 21:19:13,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=492, PETRI_PLACES=208, PETRI_TRANSITIONS=186} [2022-07-19 21:19:13,436 INFO L279 CegarLoopForPetriNet]: 209 programPoint places, -1 predicate places. [2022-07-19 21:19:13,437 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 186 transitions, 492 flow [2022-07-19 21:19:13,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 187.61111111111111) internal successors, (3377), 18 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:13,438 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:13,438 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:19:13,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:13,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 21:19:13,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 74011338, now seen corresponding path program 1 times [2022-07-19 21:19:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623076836] [2022-07-19 21:19:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:13,666 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:19:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:19:13,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:19:13,688 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:19:13,689 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:19:13,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:19:13,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:19:13,689 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:19:13,690 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:19:13,690 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:19:13,709 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 21:19:13,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 234 places, 269 transitions, 616 flow [2022-07-19 21:19:14,083 INFO L129 PetriNetUnfolder]: 264/1514 cut-off events. [2022-07-19 21:19:14,083 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-19 21:19:14,102 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 1514 events. 264/1514 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8395 event pairs, 72 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 993. Up to 192 conditions per place. [2022-07-19 21:19:14,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 269 transitions, 616 flow [2022-07-19 21:19:14,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 269 transitions, 616 flow [2022-07-19 21:19:14,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:19:14,121 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@10470366, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41dc0631 [2022-07-19 21:19:14,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:19:14,126 INFO L129 PetriNetUnfolder]: 4/86 cut-off events. [2022-07-19 21:19:14,126 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:19:14,126 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:14,126 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] [2022-07-19 21:19:14,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2119918462, now seen corresponding path program 1 times [2022-07-19 21:19:14,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30144044] [2022-07-19 21:19:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:14,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30144044] [2022-07-19 21:19:14,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30144044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:14,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:14,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:19:14,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920265582] [2022-07-19 21:19:14,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:14,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:19:14,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:14,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:19:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:19:14,157 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 269 [2022-07-19 21:19:14,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 269 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:14,158 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 269 [2022-07-19 21:19:14,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:14,424 INFO L129 PetriNetUnfolder]: 135/1362 cut-off events. [2022-07-19 21:19:14,424 INFO L130 PetriNetUnfolder]: For 644/732 co-relation queries the response was YES. [2022-07-19 21:19:14,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1827 conditions, 1362 events. 135/1362 cut-off events. For 644/732 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7972 event pairs, 72 based on Foata normal form. 1762/3047 useless extension candidates. Maximal degree in co-relation 998. Up to 228 conditions per place. [2022-07-19 21:19:14,435 INFO L132 encePairwiseOnDemand]: 225/269 looper letters, 15 selfloop transitions, 2 changer transitions 25/231 dead transitions. [2022-07-19 21:19:14,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 231 transitions, 586 flow [2022-07-19 21:19:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:19:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:19:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 696 transitions. [2022-07-19 21:19:14,438 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.862453531598513 [2022-07-19 21:19:14,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 696 transitions. [2022-07-19 21:19:14,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 696 transitions. [2022-07-19 21:19:14,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:14,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 696 transitions. [2022-07-19 21:19:14,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,443 INFO L186 Difference]: Start difference. First operand has 234 places, 269 transitions, 616 flow. Second operand 3 states and 696 transitions. [2022-07-19 21:19:14,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 231 transitions, 586 flow [2022-07-19 21:19:14,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 231 transitions, 586 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:19:14,448 INFO L242 Difference]: Finished difference. Result has 236 places, 203 transitions, 476 flow [2022-07-19 21:19:14,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=236, PETRI_TRANSITIONS=203} [2022-07-19 21:19:14,449 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, 2 predicate places. [2022-07-19 21:19:14,449 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 203 transitions, 476 flow [2022-07-19 21:19:14,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,449 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:14,450 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] [2022-07-19 21:19:14,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 21:19:14,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 808725012, now seen corresponding path program 1 times [2022-07-19 21:19:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:14,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016081146] [2022-07-19 21:19:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:14,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016081146] [2022-07-19 21:19:14,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016081146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:19:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986748555] [2022-07-19 21:19:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:14,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:14,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:19:14,492 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) [2022-07-19 21:19:14,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:19:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:19:14,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:19:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:19:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:19:14,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986748555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:19:14,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:19:14,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:19:14,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766561702] [2022-07-19 21:19:14,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:19:14,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:19:14,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:19:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:19:14,688 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 269 [2022-07-19 21:19:14,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 203 transitions, 476 flow. Second operand has 10 states, 10 states have (on average 209.3) internal successors, (2093), 10 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:14,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 269 [2022-07-19 21:19:14,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:19:14,798 INFO L129 PetriNetUnfolder]: 1/284 cut-off events. [2022-07-19 21:19:14,798 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-19 21:19:14,798 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 284 events. 1/284 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 632 event pairs, 0 based on Foata normal form. 2/285 useless extension candidates. Maximal degree in co-relation 307. Up to 19 conditions per place. [2022-07-19 21:19:14,799 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 16 selfloop transitions, 9 changer transitions 0/213 dead transitions. [2022-07-19 21:19:14,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 213 transitions, 548 flow [2022-07-19 21:19:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:19:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:19:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1890 transitions. [2022-07-19 21:19:14,804 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7806691449814126 [2022-07-19 21:19:14,804 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1890 transitions. [2022-07-19 21:19:14,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1890 transitions. [2022-07-19 21:19:14,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:19:14,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1890 transitions. [2022-07-19 21:19:14,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 210.0) internal successors, (1890), 9 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,814 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,814 INFO L186 Difference]: Start difference. First operand has 236 places, 203 transitions, 476 flow. Second operand 9 states and 1890 transitions. [2022-07-19 21:19:14,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 213 transitions, 548 flow [2022-07-19 21:19:14,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 213 transitions, 516 flow, removed 15 selfloop flow, removed 1 redundant places. [2022-07-19 21:19:14,819 INFO L242 Difference]: Finished difference. Result has 227 places, 209 transitions, 494 flow [2022-07-19 21:19:14,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=494, PETRI_PLACES=227, PETRI_TRANSITIONS=209} [2022-07-19 21:19:14,820 INFO L279 CegarLoopForPetriNet]: 234 programPoint places, -7 predicate places. [2022-07-19 21:19:14,820 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 209 transitions, 494 flow [2022-07-19 21:19:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 209.3) internal successors, (2093), 10 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:14,821 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:19:14,822 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:19:14,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:19:15,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:19:15,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:19:15,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:19:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash 856508027, now seen corresponding path program 1 times [2022-07-19 21:19:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:19:15,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002022491] [2022-07-19 21:19:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:19:15,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:19:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:19:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 21:19:15,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:19:15,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002022491] [2022-07-19 21:19:15,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002022491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:19:15,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:19:15,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:19:15,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071192786] [2022-07-19 21:19:15,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:19:15,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:19:15,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:19:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:19:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:19:15,126 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 269 [2022-07-19 21:19:15,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 209 transitions, 494 flow. Second operand has 5 states, 5 states have (on average 186.6) internal successors, (933), 5 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:19:15,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:19:15,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 269 [2022-07-19 21:19:15,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand