./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:16:23,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:16:23,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:16:23,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:16:23,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:16:23,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:16:23,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:16:23,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:16:23,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:16:23,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:16:23,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:16:23,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:16:23,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:16:23,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:16:23,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:16:23,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:16:23,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:16:23,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:16:23,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:16:23,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:16:23,235 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:16:23,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:16:23,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:16:23,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:16:23,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:16:23,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:16:23,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:16:23,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:16:23,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:16:23,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:16:23,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:16:23,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:16:23,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:16:23,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:16:23,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:16:23,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:16:23,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:16:23,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:16:23,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:16:23,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:16:23,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:16:23,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:16:23,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:16:23,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:16:23,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:16:23,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:16:23,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:16:23,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:16:23,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:16:23,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:16:23,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:16:23,296 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:16:23,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:16:23,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:16:23,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:16:23,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:16:23,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:16:23,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:16:23,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:16:23,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:16:23,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:16:23,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:16:23,300 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:16:23,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:16:23,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:16:23,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:16:23,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:16:23,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:23,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:16:23,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:16:23,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:16:23,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:16:23,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:16:23,302 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:16:23,303 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:16:23,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:16:23,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2022-07-12 10:16:23,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:16:23,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:16:23,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:16:23,575 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:16:23,576 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:16:23,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-07-12 10:16:23,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d26c4ebcd/12e99d75cdfb450da6837ea5fec15b11/FLAGc7392dfc3 [2022-07-12 10:16:24,091 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:16:24,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-07-12 10:16:24,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d26c4ebcd/12e99d75cdfb450da6837ea5fec15b11/FLAGc7392dfc3 [2022-07-12 10:16:24,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d26c4ebcd/12e99d75cdfb450da6837ea5fec15b11 [2022-07-12 10:16:24,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:16:24,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:16:24,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:24,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:16:24,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:16:24,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:24,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5462bb74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24, skipping insertion in model container [2022-07-12 10:16:24,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:24,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:16:24,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:16:24,817 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_22-deref_read_racefree.i[30176,30189] [2022-07-12 10:16:24,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:24,851 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:16:24,897 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_22-deref_read_racefree.i[30176,30189] [2022-07-12 10:16:24,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:16:24,941 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:16:24,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24 WrapperNode [2022-07-12 10:16:24,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:16:24,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:24,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:16:24,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:16:24,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:24,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,005 INFO L137 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-12 10:16:25,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:16:25,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:16:25,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:16:25,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:16:25,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:16:25,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:16:25,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:16:25,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:16:25,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (1/1) ... [2022-07-12 10:16:25,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:16:25,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:25,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:16:25,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:16:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:16:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:16:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-12 10:16:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:16:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:16:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-12 10:16:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-12 10:16:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:16:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:16:25,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:16:25,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:16:25,144 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:16:25,268 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:16:25,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:16:25,471 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:16:25,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:16:25,479 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-12 10:16:25,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:25 BoogieIcfgContainer [2022-07-12 10:16:25,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:16:25,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:16:25,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:16:25,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:16:25,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:16:24" (1/3) ... [2022-07-12 10:16:25,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac18a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:25, skipping insertion in model container [2022-07-12 10:16:25,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:16:24" (2/3) ... [2022-07-12 10:16:25,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac18a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:16:25, skipping insertion in model container [2022-07-12 10:16:25,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:16:25" (3/3) ... [2022-07-12 10:16:25,494 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2022-07-12 10:16:25,499 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:16:25,506 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:16:25,506 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:16:25,507 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:16:25,558 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:25,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 99 places, 106 transitions, 217 flow [2022-07-12 10:16:25,637 INFO L129 PetriNetUnfolder]: 14/140 cut-off events. [2022-07-12 10:16:25,638 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:25,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 14/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 315 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-12 10:16:25,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 106 transitions, 217 flow [2022-07-12 10:16:25,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 106 transitions, 217 flow [2022-07-12 10:16:25,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:25,681 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:25,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:25,719 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-12 10:16:25,725 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:25,725 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:25,726 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] [2022-07-12 10:16:25,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1463212038, now seen corresponding path program 1 times [2022-07-12 10:16:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651962635] [2022-07-12 10:16:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:25,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651962635] [2022-07-12 10:16:26,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651962635] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:26,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994180774] [2022-07-12 10:16:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:26,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:26,053 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 106 [2022-07-12 10:16:26,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 217 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 106 [2022-07-12 10:16:26,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,107 INFO L129 PetriNetUnfolder]: 0/124 cut-off events. [2022-07-12 10:16:26,107 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:26,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 124 events. 0/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 189 event pairs, 0 based on Foata normal form. 14/134 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-12 10:16:26,109 INFO L132 encePairwiseOnDemand]: 96/106 looper letters, 1 selfloop transitions, 0 changer transitions 12/95 dead transitions. [2022-07-12 10:16:26,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 197 flow [2022-07-12 10:16:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-07-12 10:16:26,124 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9386792452830188 [2022-07-12 10:16:26,125 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-07-12 10:16:26,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-07-12 10:16:26,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-07-12 10:16:26,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,143 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,144 INFO L186 Difference]: Start difference. First operand has 99 places, 106 transitions, 217 flow. Second operand 2 states and 199 transitions. [2022-07-12 10:16:26,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 197 flow [2022-07-12 10:16:26,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 95 transitions, 197 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:26,153 INFO L242 Difference]: Finished difference. Result has 99 places, 83 transitions, 171 flow [2022-07-12 10:16:26,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=171, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2022-07-12 10:16:26,158 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-07-12 10:16:26,158 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 171 flow [2022-07-12 10:16:26,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,159 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,159 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] [2022-07-12 10:16:26,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:16:26,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1169809031, now seen corresponding path program 1 times [2022-07-12 10:16:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90879296] [2022-07-12 10:16:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90879296] [2022-07-12 10:16:26,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90879296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029639730] [2022-07-12 10:16:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:26,263 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 106 [2022-07-12 10:16:26,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 106 [2022-07-12 10:16:26,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,299 INFO L129 PetriNetUnfolder]: 0/87 cut-off events. [2022-07-12 10:16:26,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:26,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 87 events. 0/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:26,300 INFO L132 encePairwiseOnDemand]: 103/106 looper letters, 8 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-07-12 10:16:26,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 195 flow [2022-07-12 10:16:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-07-12 10:16:26,303 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8553459119496856 [2022-07-12 10:16:26,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-07-12 10:16:26,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-07-12 10:16:26,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-07-12 10:16:26,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,307 INFO L186 Difference]: Start difference. First operand has 99 places, 83 transitions, 171 flow. Second operand 3 states and 272 transitions. [2022-07-12 10:16:26,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 195 flow [2022-07-12 10:16:26,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 195 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:26,310 INFO L242 Difference]: Finished difference. Result has 90 places, 83 transitions, 179 flow [2022-07-12 10:16:26,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2022-07-12 10:16:26,311 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, -9 predicate places. [2022-07-12 10:16:26,311 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 179 flow [2022-07-12 10:16:26,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,312 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] [2022-07-12 10:16:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:16:26,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,314 INFO L85 PathProgramCache]: Analyzing trace with hash 602894772, now seen corresponding path program 1 times [2022-07-12 10:16:26,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985031379] [2022-07-12 10:16:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:26,351 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:26,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:26,392 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:26,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:26,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:26,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:16:26,395 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:16:26,397 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:26,397 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:16:26,413 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:26,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 128 places, 139 transitions, 290 flow [2022-07-12 10:16:26,440 INFO L129 PetriNetUnfolder]: 24/212 cut-off events. [2022-07-12 10:16:26,441 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:16:26,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 212 events. 24/212 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 591 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-07-12 10:16:26,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 139 transitions, 290 flow [2022-07-12 10:16:26,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 139 transitions, 290 flow [2022-07-12 10:16:26,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:26,447 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:26,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:26,455 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-12 10:16:26,455 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:26,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,456 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] [2022-07-12 10:16:26,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2146504794, now seen corresponding path program 1 times [2022-07-12 10:16:26,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922736270] [2022-07-12 10:16:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922736270] [2022-07-12 10:16:26,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922736270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:26,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921951272] [2022-07-12 10:16:26,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:26,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 139 [2022-07-12 10:16:26,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 290 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 139 [2022-07-12 10:16:26,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,544 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2022-07-12 10:16:26,544 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:16:26,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 0/185 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 443 event pairs, 0 based on Foata normal form. 26/205 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-12 10:16:26,546 INFO L132 encePairwiseOnDemand]: 123/139 looper letters, 2 selfloop transitions, 0 changer transitions 12/122 dead transitions. [2022-07-12 10:16:26,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 122 transitions, 260 flow [2022-07-12 10:16:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2022-07-12 10:16:26,552 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9280575539568345 [2022-07-12 10:16:26,552 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2022-07-12 10:16:26,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2022-07-12 10:16:26,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2022-07-12 10:16:26,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,560 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,560 INFO L186 Difference]: Start difference. First operand has 128 places, 139 transitions, 290 flow. Second operand 2 states and 258 transitions. [2022-07-12 10:16:26,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 122 transitions, 260 flow [2022-07-12 10:16:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 122 transitions, 258 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:26,563 INFO L242 Difference]: Finished difference. Result has 128 places, 110 transitions, 230 flow [2022-07-12 10:16:26,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=128, PETRI_TRANSITIONS=110} [2022-07-12 10:16:26,564 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, 0 predicate places. [2022-07-12 10:16:26,565 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 110 transitions, 230 flow [2022-07-12 10:16:26,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,565 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] [2022-07-12 10:16:26,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:16:26,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059495, now seen corresponding path program 1 times [2022-07-12 10:16:26,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954608790] [2022-07-12 10:16:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954608790] [2022-07-12 10:16:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954608790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:26,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:26,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389806407] [2022-07-12 10:16:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:26,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:26,625 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 139 [2022-07-12 10:16:26,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 110 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:26,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 139 [2022-07-12 10:16:26,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:26,670 INFO L129 PetriNetUnfolder]: 0/136 cut-off events. [2022-07-12 10:16:26,670 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:16:26,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 136 events. 0/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 219 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-12 10:16:26,671 INFO L132 encePairwiseOnDemand]: 136/139 looper letters, 11 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2022-07-12 10:16:26,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 264 flow [2022-07-12 10:16:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-07-12 10:16:26,679 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8465227817745803 [2022-07-12 10:16:26,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-07-12 10:16:26,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-07-12 10:16:26,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:26,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-07-12 10:16:26,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,684 INFO L186 Difference]: Start difference. First operand has 128 places, 110 transitions, 230 flow. Second operand 3 states and 353 transitions. [2022-07-12 10:16:26,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 264 flow [2022-07-12 10:16:26,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 114 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:26,692 INFO L242 Difference]: Finished difference. Result has 119 places, 111 transitions, 242 flow [2022-07-12 10:16:26,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2022-07-12 10:16:26,694 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -9 predicate places. [2022-07-12 10:16:26,694 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 242 flow [2022-07-12 10:16:26,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:26,695 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:26,696 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] [2022-07-12 10:16:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:16:26,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1922399296, now seen corresponding path program 1 times [2022-07-12 10:16:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:26,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377029645] [2022-07-12 10:16:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:26,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377029645] [2022-07-12 10:16:26,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377029645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828224171] [2022-07-12 10:16:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:26,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:26,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:26,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:26,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:16:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:26,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:26,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828224171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:27,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:27,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765744710] [2022-07-12 10:16:27,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:27,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:27,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:27,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 139 [2022-07-12 10:16:27,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:27,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 139 [2022-07-12 10:16:27,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:27,140 INFO L129 PetriNetUnfolder]: 0/110 cut-off events. [2022-07-12 10:16:27,140 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:16:27,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:16:27,142 INFO L132 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-07-12 10:16:27,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-07-12 10:16:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1026 transitions. [2022-07-12 10:16:27,145 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8201438848920863 [2022-07-12 10:16:27,146 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1026 transitions. [2022-07-12 10:16:27,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1026 transitions. [2022-07-12 10:16:27,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:27,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1026 transitions. [2022-07-12 10:16:27,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,169 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,169 INFO L186 Difference]: Start difference. First operand has 119 places, 111 transitions, 242 flow. Second operand 9 states and 1026 transitions. [2022-07-12 10:16:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-07-12 10:16:27,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:27,171 INFO L242 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-07-12 10:16:27,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-07-12 10:16:27,172 INFO L279 CegarLoopForPetriNet]: 128 programPoint places, -15 predicate places. [2022-07-12 10:16:27,172 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-07-12 10:16:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.3) internal successors, (1143), 10 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,173 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,173 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] [2022-07-12 10:16:27,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:16:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 10:16:27,392 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1177181810, now seen corresponding path program 1 times [2022-07-12 10:16:27,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576119743] [2022-07-12 10:16:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:27,410 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:27,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:27,429 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:27,429 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:27,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:16:27,430 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:27,430 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:27,430 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:16:27,447 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:27,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 157 places, 172 transitions, 365 flow [2022-07-12 10:16:27,477 INFO L129 PetriNetUnfolder]: 34/284 cut-off events. [2022-07-12 10:16:27,477 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:27,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 284 events. 34/284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 864 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2022-07-12 10:16:27,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 172 transitions, 365 flow [2022-07-12 10:16:27,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 172 transitions, 365 flow [2022-07-12 10:16:27,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:27,486 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:27,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:27,495 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-12 10:16:27,495 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:27,495 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,495 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] [2022-07-12 10:16:27,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash 277282342, now seen corresponding path program 1 times [2022-07-12 10:16:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:27,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928829193] [2022-07-12 10:16:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:27,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928829193] [2022-07-12 10:16:27,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928829193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:27,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:27,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:27,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394345486] [2022-07-12 10:16:27,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:27,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:27,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:27,517 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 172 [2022-07-12 10:16:27,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 365 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:27,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 172 [2022-07-12 10:16:27,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:27,549 INFO L129 PetriNetUnfolder]: 0/246 cut-off events. [2022-07-12 10:16:27,550 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-12 10:16:27,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 246 events. 0/246 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 722 event pairs, 0 based on Foata normal form. 42/280 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-12 10:16:27,551 INFO L132 encePairwiseOnDemand]: 150/172 looper letters, 3 selfloop transitions, 0 changer transitions 12/149 dead transitions. [2022-07-12 10:16:27,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 149 transitions, 325 flow [2022-07-12 10:16:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2022-07-12 10:16:27,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9215116279069767 [2022-07-12 10:16:27,553 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2022-07-12 10:16:27,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2022-07-12 10:16:27,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:27,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2022-07-12 10:16:27,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,556 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,556 INFO L186 Difference]: Start difference. First operand has 157 places, 172 transitions, 365 flow. Second operand 2 states and 317 transitions. [2022-07-12 10:16:27,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 149 transitions, 325 flow [2022-07-12 10:16:27,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 149 transitions, 319 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:27,562 INFO L242 Difference]: Finished difference. Result has 157 places, 137 transitions, 289 flow [2022-07-12 10:16:27,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=289, PETRI_PLACES=157, PETRI_TRANSITIONS=137} [2022-07-12 10:16:27,563 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 0 predicate places. [2022-07-12 10:16:27,564 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 137 transitions, 289 flow [2022-07-12 10:16:27,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,564 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] [2022-07-12 10:16:27,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:16:27,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:27,566 INFO L85 PathProgramCache]: Analyzing trace with hash -16120665, now seen corresponding path program 1 times [2022-07-12 10:16:27,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:27,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802450412] [2022-07-12 10:16:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:27,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802450412] [2022-07-12 10:16:27,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802450412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:27,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:27,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:27,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409860269] [2022-07-12 10:16:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:27,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:27,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:27,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:27,595 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 172 [2022-07-12 10:16:27,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 137 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:27,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 172 [2022-07-12 10:16:27,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:27,640 INFO L129 PetriNetUnfolder]: 0/185 cut-off events. [2022-07-12 10:16:27,641 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:16:27,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 185 events. 0/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-12 10:16:27,642 INFO L132 encePairwiseOnDemand]: 169/172 looper letters, 12 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2022-07-12 10:16:27,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 325 flow [2022-07-12 10:16:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-07-12 10:16:27,644 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8372093023255814 [2022-07-12 10:16:27,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-07-12 10:16:27,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-07-12 10:16:27,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:27,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-07-12 10:16:27,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,648 INFO L186 Difference]: Start difference. First operand has 157 places, 137 transitions, 289 flow. Second operand 3 states and 432 transitions. [2022-07-12 10:16:27,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 325 flow [2022-07-12 10:16:27,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:27,651 INFO L242 Difference]: Finished difference. Result has 148 places, 138 transitions, 301 flow [2022-07-12 10:16:27,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2022-07-12 10:16:27,652 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, -9 predicate places. [2022-07-12 10:16:27,652 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 301 flow [2022-07-12 10:16:27,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,653 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,653 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] [2022-07-12 10:16:27,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:16:27,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1156559264, now seen corresponding path program 1 times [2022-07-12 10:16:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:27,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67092919] [2022-07-12 10:16:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67092919] [2022-07-12 10:16:27,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67092919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:27,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44610308] [2022-07-12 10:16:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:27,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:27,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:27,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:16:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:27,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44610308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:27,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:27,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:27,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91177104] [2022-07-12 10:16:27,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:27,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:27,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:27,854 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 172 [2022-07-12 10:16:27,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:27,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 172 [2022-07-12 10:16:27,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:27,936 INFO L129 PetriNetUnfolder]: 0/159 cut-off events. [2022-07-12 10:16:27,936 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:16:27,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 159 events. 0/159 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 247 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:27,937 INFO L132 encePairwiseOnDemand]: 166/172 looper letters, 13 selfloop transitions, 9 changer transitions 0/148 dead transitions. [2022-07-12 10:16:27,937 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 367 flow [2022-07-12 10:16:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1266 transitions. [2022-07-12 10:16:27,941 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178294573643411 [2022-07-12 10:16:27,941 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1266 transitions. [2022-07-12 10:16:27,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1266 transitions. [2022-07-12 10:16:27,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:27,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1266 transitions. [2022-07-12 10:16:27,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.66666666666666) internal successors, (1266), 9 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,948 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,948 INFO L186 Difference]: Start difference. First operand has 148 places, 138 transitions, 301 flow. Second operand 9 states and 1266 transitions. [2022-07-12 10:16:27,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 367 flow [2022-07-12 10:16:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 148 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:27,951 INFO L242 Difference]: Finished difference. Result has 158 places, 144 transitions, 349 flow [2022-07-12 10:16:27,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=349, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2022-07-12 10:16:27,952 INFO L279 CegarLoopForPetriNet]: 157 programPoint places, 1 predicate places. [2022-07-12 10:16:27,952 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 349 flow [2022-07-12 10:16:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.3) internal successors, (1403), 10 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:27,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:27,953 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] [2022-07-12 10:16:27,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:28,170 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,SelfDestructingSolverStorable9 [2022-07-12 10:16:28,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1450639895, now seen corresponding path program 1 times [2022-07-12 10:16:28,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656824739] [2022-07-12 10:16:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:28,199 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:28,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:28,233 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:28,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:28,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:28,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:16:28,234 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:28,234 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:28,234 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:16:28,271 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:28,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 186 places, 205 transitions, 442 flow [2022-07-12 10:16:28,327 INFO L129 PetriNetUnfolder]: 44/356 cut-off events. [2022-07-12 10:16:28,328 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:16:28,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 356 events. 44/356 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1145 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 292. Up to 10 conditions per place. [2022-07-12 10:16:28,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 205 transitions, 442 flow [2022-07-12 10:16:28,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 205 transitions, 442 flow [2022-07-12 10:16:28,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:28,337 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:28,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:28,345 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-12 10:16:28,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:28,346 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,346 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] [2022-07-12 10:16:28,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash 144638854, now seen corresponding path program 1 times [2022-07-12 10:16:28,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474622183] [2022-07-12 10:16:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:28,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474622183] [2022-07-12 10:16:28,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474622183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:28,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:28,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:28,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614785659] [2022-07-12 10:16:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:28,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:28,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:28,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:28,376 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 205 [2022-07-12 10:16:28,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:28,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 205 [2022-07-12 10:16:28,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:28,430 INFO L129 PetriNetUnfolder]: 0/307 cut-off events. [2022-07-12 10:16:28,430 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-12 10:16:28,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 307 events. 0/307 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 992 event pairs, 0 based on Foata normal form. 64/361 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-07-12 10:16:28,431 INFO L132 encePairwiseOnDemand]: 177/205 looper letters, 4 selfloop transitions, 0 changer transitions 12/176 dead transitions. [2022-07-12 10:16:28,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 176 transitions, 392 flow [2022-07-12 10:16:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2022-07-12 10:16:28,433 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9170731707317074 [2022-07-12 10:16:28,433 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2022-07-12 10:16:28,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2022-07-12 10:16:28,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:28,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2022-07-12 10:16:28,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,436 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,436 INFO L186 Difference]: Start difference. First operand has 186 places, 205 transitions, 442 flow. Second operand 2 states and 376 transitions. [2022-07-12 10:16:28,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 176 transitions, 392 flow [2022-07-12 10:16:28,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 176 transitions, 380 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:28,440 INFO L242 Difference]: Finished difference. Result has 186 places, 164 transitions, 348 flow [2022-07-12 10:16:28,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=348, PETRI_PLACES=186, PETRI_TRANSITIONS=164} [2022-07-12 10:16:28,441 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, 0 predicate places. [2022-07-12 10:16:28,442 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 164 transitions, 348 flow [2022-07-12 10:16:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 172.5) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,442 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,442 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] [2022-07-12 10:16:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:16:28,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash -148764153, now seen corresponding path program 1 times [2022-07-12 10:16:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804382688] [2022-07-12 10:16:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804382688] [2022-07-12 10:16:28,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804382688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:28,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:28,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:28,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236929151] [2022-07-12 10:16:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:28,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:28,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:28,476 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 205 [2022-07-12 10:16:28,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 164 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:28,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 205 [2022-07-12 10:16:28,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:28,530 INFO L129 PetriNetUnfolder]: 0/234 cut-off events. [2022-07-12 10:16:28,530 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:16:28,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 234 events. 0/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 587 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-12 10:16:28,531 INFO L132 encePairwiseOnDemand]: 202/205 looper letters, 13 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-07-12 10:16:28,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 386 flow [2022-07-12 10:16:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-07-12 10:16:28,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8308943089430895 [2022-07-12 10:16:28,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-07-12 10:16:28,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-07-12 10:16:28,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:28,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-07-12 10:16:28,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,536 INFO L186 Difference]: Start difference. First operand has 186 places, 164 transitions, 348 flow. Second operand 3 states and 511 transitions. [2022-07-12 10:16:28,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 386 flow [2022-07-12 10:16:28,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 168 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:28,540 INFO L242 Difference]: Finished difference. Result has 177 places, 165 transitions, 360 flow [2022-07-12 10:16:28,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=360, PETRI_PLACES=177, PETRI_TRANSITIONS=165} [2022-07-12 10:16:28,541 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, -9 predicate places. [2022-07-12 10:16:28,541 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 360 flow [2022-07-12 10:16:28,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,542 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] [2022-07-12 10:16:28,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:16:28,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash -965032960, now seen corresponding path program 1 times [2022-07-12 10:16:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:28,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766674132] [2022-07-12 10:16:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766674132] [2022-07-12 10:16:28,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766674132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410755900] [2022-07-12 10:16:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:28,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:28,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:28,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:16:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:28,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410755900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:28,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:28,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947752397] [2022-07-12 10:16:28,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:28,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:28,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-07-12 10:16:28,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 165 transitions, 360 flow. Second operand has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:28,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-07-12 10:16:28,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:28,844 INFO L129 PetriNetUnfolder]: 0/208 cut-off events. [2022-07-12 10:16:28,844 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:16:28,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 208 events. 0/208 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 431 event pairs, 0 based on Foata normal form. 2/210 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:28,845 INFO L132 encePairwiseOnDemand]: 199/205 looper letters, 14 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-07-12 10:16:28,845 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 428 flow [2022-07-12 10:16:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-12 10:16:28,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.813550135501355 [2022-07-12 10:16:28,849 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-12 10:16:28,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-12 10:16:28,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:28,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-12 10:16:28,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,857 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,857 INFO L186 Difference]: Start difference. First operand has 177 places, 165 transitions, 360 flow. Second operand 9 states and 1501 transitions. [2022-07-12 10:16:28,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 428 flow [2022-07-12 10:16:28,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 175 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:28,860 INFO L242 Difference]: Finished difference. Result has 187 places, 171 transitions, 408 flow [2022-07-12 10:16:28,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=171} [2022-07-12 10:16:28,861 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, 1 predicate places. [2022-07-12 10:16:28,861 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 171 transitions, 408 flow [2022-07-12 10:16:28,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:28,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:28,862 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] [2022-07-12 10:16:28,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:29,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:29,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1583364555, now seen corresponding path program 1 times [2022-07-12 10:16:29,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:29,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414938577] [2022-07-12 10:16:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:29,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414938577] [2022-07-12 10:16:29,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414938577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:29,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026210641] [2022-07-12 10:16:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:29,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:29,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:16:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026210641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:29,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:29,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446128709] [2022-07-12 10:16:29,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:29,416 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 205 [2022-07-12 10:16:29,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 171 transitions, 408 flow. Second operand has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:29,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 205 [2022-07-12 10:16:29,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:29,534 INFO L129 PetriNetUnfolder]: 0/182 cut-off events. [2022-07-12 10:16:29,534 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-12 10:16:29,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:16:29,535 INFO L132 encePairwiseOnDemand]: 200/205 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-07-12 10:16:29,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-07-12 10:16:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:16:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:16:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2490 transitions. [2022-07-12 10:16:29,545 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8097560975609757 [2022-07-12 10:16:29,545 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2490 transitions. [2022-07-12 10:16:29,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2490 transitions. [2022-07-12 10:16:29,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:29,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2490 transitions. [2022-07-12 10:16:29,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.0) internal successors, (2490), 15 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,558 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 205.0) internal successors, (3280), 16 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,558 INFO L186 Difference]: Start difference. First operand has 187 places, 171 transitions, 408 flow. Second operand 15 states and 2490 transitions. [2022-07-12 10:16:29,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-07-12 10:16:29,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:29,562 INFO L242 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-07-12 10:16:29,562 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-07-12 10:16:29,562 INFO L279 CegarLoopForPetriNet]: 186 programPoint places, -2 predicate places. [2022-07-12 10:16:29,563 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-07-12 10:16:29,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 166.61111111111111) internal successors, (2999), 18 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,564 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:29,564 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] [2022-07-12 10:16:29,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:29,783 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,SelfDestructingSolverStorable14 [2022-07-12 10:16:29,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1301575835, now seen corresponding path program 1 times [2022-07-12 10:16:29,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:29,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081768030] [2022-07-12 10:16:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:29,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:29,826 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:29,827 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:29,827 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:29,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:29,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:16:29,827 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:29,828 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:29,828 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:16:29,845 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:29,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 215 places, 238 transitions, 521 flow [2022-07-12 10:16:29,893 INFO L129 PetriNetUnfolder]: 54/428 cut-off events. [2022-07-12 10:16:29,893 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:29,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 428 events. 54/428 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1420 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 369. Up to 12 conditions per place. [2022-07-12 10:16:29,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 238 transitions, 521 flow [2022-07-12 10:16:29,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 238 transitions, 521 flow [2022-07-12 10:16:29,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:29,905 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:29,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:29,910 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-12 10:16:29,910 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:29,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:29,911 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] [2022-07-12 10:16:29,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1457129031, now seen corresponding path program 1 times [2022-07-12 10:16:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:29,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350837052] [2022-07-12 10:16:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:29,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350837052] [2022-07-12 10:16:29,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350837052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:29,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:29,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:29,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756108436] [2022-07-12 10:16:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:29,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:29,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:29,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:29,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:29,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 238 [2022-07-12 10:16:29,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:29,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:29,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 238 [2022-07-12 10:16:29,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:29,997 INFO L129 PetriNetUnfolder]: 0/343 cut-off events. [2022-07-12 10:16:29,997 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:29,997 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 343 events. 0/343 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1139 event pairs, 0 based on Foata normal form. 379/712 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:16:29,998 INFO L132 encePairwiseOnDemand]: 201/238 looper letters, 14 selfloop transitions, 2 changer transitions 12/207 dead transitions. [2022-07-12 10:16:29,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 207 transitions, 491 flow [2022-07-12 10:16:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-07-12 10:16:30,001 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8837535014005602 [2022-07-12 10:16:30,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-07-12 10:16:30,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-07-12 10:16:30,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:30,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-07-12 10:16:30,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,004 INFO L186 Difference]: Start difference. First operand has 215 places, 238 transitions, 521 flow. Second operand 3 states and 631 transitions. [2022-07-12 10:16:30,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 207 transitions, 491 flow [2022-07-12 10:16:30,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 207 transitions, 471 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:30,009 INFO L242 Difference]: Finished difference. Result has 217 places, 192 transitions, 419 flow [2022-07-12 10:16:30,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=214, 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=419, PETRI_PLACES=217, PETRI_TRANSITIONS=192} [2022-07-12 10:16:30,009 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2022-07-12 10:16:30,010 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 192 transitions, 419 flow [2022-07-12 10:16:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,010 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:30,010 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] [2022-07-12 10:16:30,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:16:30,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1797989088, now seen corresponding path program 1 times [2022-07-12 10:16:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:30,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956274520] [2022-07-12 10:16:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:30,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956274520] [2022-07-12 10:16:30,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956274520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:30,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830420915] [2022-07-12 10:16:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:30,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:30,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:16:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830420915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:30,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:30,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148327565] [2022-07-12 10:16:30,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:30,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:30,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:30,214 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-07-12 10:16:30,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 192 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:30,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-07-12 10:16:30,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:30,312 INFO L129 PetriNetUnfolder]: 0/257 cut-off events. [2022-07-12 10:16:30,312 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:30,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 257 events. 0/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 613 event pairs, 0 based on Foata normal form. 2/259 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:30,313 INFO L132 encePairwiseOnDemand]: 232/238 looper letters, 15 selfloop transitions, 9 changer transitions 0/202 dead transitions. [2022-07-12 10:16:30,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 202 transitions, 489 flow [2022-07-12 10:16:30,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1736 transitions. [2022-07-12 10:16:30,317 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8104575163398693 [2022-07-12 10:16:30,317 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1736 transitions. [2022-07-12 10:16:30,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1736 transitions. [2022-07-12 10:16:30,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:30,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1736 transitions. [2022-07-12 10:16:30,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 192.88888888888889) internal successors, (1736), 9 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,338 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,338 INFO L186 Difference]: Start difference. First operand has 217 places, 192 transitions, 419 flow. Second operand 9 states and 1736 transitions. [2022-07-12 10:16:30,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 202 transitions, 489 flow [2022-07-12 10:16:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:30,343 INFO L242 Difference]: Finished difference. Result has 215 places, 198 transitions, 467 flow [2022-07-12 10:16:30,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=467, PETRI_PLACES=215, PETRI_TRANSITIONS=198} [2022-07-12 10:16:30,343 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-07-12 10:16:30,343 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 198 transitions, 467 flow [2022-07-12 10:16:30,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 192.3) internal successors, (1923), 10 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:30,345 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] [2022-07-12 10:16:30,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:30,568 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 [2022-07-12 10:16:30,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1377325333, now seen corresponding path program 1 times [2022-07-12 10:16:30,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:30,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769280395] [2022-07-12 10:16:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:30,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769280395] [2022-07-12 10:16:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769280395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828258667] [2022-07-12 10:16:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:30,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:30,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:30,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:30,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:16:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:30,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828258667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:30,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:30,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241199263] [2022-07-12 10:16:30,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:30,879 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 238 [2022-07-12 10:16:30,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 198 transitions, 467 flow. Second operand has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:30,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:30,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 238 [2022-07-12 10:16:30,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:31,053 INFO L129 PetriNetUnfolder]: 0/218 cut-off events. [2022-07-12 10:16:31,054 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-12 10:16:31,054 INFO L84 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-12 10:16:31,055 INFO L132 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-07-12 10:16:31,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 565 flow [2022-07-12 10:16:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:16:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:16:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3457 transitions. [2022-07-12 10:16:31,064 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8069561157796452 [2022-07-12 10:16:31,064 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3457 transitions. [2022-07-12 10:16:31,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3457 transitions. [2022-07-12 10:16:31,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:31,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3457 transitions. [2022-07-12 10:16:31,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 192.05555555555554) internal successors, (3457), 18 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,083 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,084 INFO L186 Difference]: Start difference. First operand has 215 places, 198 transitions, 467 flow. Second operand 18 states and 3457 transitions. [2022-07-12 10:16:31,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 565 flow [2022-07-12 10:16:31,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:31,088 INFO L242 Difference]: Finished difference. Result has 215 places, 191 transitions, 480 flow [2022-07-12 10:16:31,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=191} [2022-07-12 10:16:31,089 INFO L279 CegarLoopForPetriNet]: 215 programPoint places, 0 predicate places. [2022-07-12 10:16:31,089 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 191 transitions, 480 flow [2022-07-12 10:16:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 192.61111111111111) internal successors, (3467), 18 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:31,091 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] [2022-07-12 10:16:31,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:31,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -544530782, now seen corresponding path program 1 times [2022-07-12 10:16:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:31,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855894701] [2022-07-12 10:16:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:31,349 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:31,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:31,389 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:31,389 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:31,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:16:31,390 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:31,390 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:31,391 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:16:31,415 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:31,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 244 places, 271 transitions, 602 flow [2022-07-12 10:16:31,477 INFO L129 PetriNetUnfolder]: 64/500 cut-off events. [2022-07-12 10:16:31,478 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:16:31,487 INFO L84 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 500 events. 64/500 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1726 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 447. Up to 14 conditions per place. [2022-07-12 10:16:31,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 271 transitions, 602 flow [2022-07-12 10:16:31,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 271 transitions, 602 flow [2022-07-12 10:16:31,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:31,495 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:31,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:31,500 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-12 10:16:31,501 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:31,501 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:31,501 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] [2022-07-12 10:16:31,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:31,501 INFO L85 PathProgramCache]: Analyzing trace with hash 506591591, now seen corresponding path program 1 times [2022-07-12 10:16:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:31,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128257866] [2022-07-12 10:16:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:31,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128257866] [2022-07-12 10:16:31,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128257866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:31,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:31,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185488449] [2022-07-12 10:16:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:31,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:31,521 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 271 [2022-07-12 10:16:31,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 602 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:31,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 271 [2022-07-12 10:16:31,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:31,615 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2022-07-12 10:16:31,616 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:16:31,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 404 events. 0/404 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1410 event pairs, 0 based on Foata normal form. 558/950 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:16:31,617 INFO L132 encePairwiseOnDemand]: 228/271 looper letters, 15 selfloop transitions, 2 changer transitions 12/234 dead transitions. [2022-07-12 10:16:31,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 234 transitions, 562 flow [2022-07-12 10:16:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2022-07-12 10:16:31,619 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8806888068880688 [2022-07-12 10:16:31,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2022-07-12 10:16:31,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2022-07-12 10:16:31,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:31,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2022-07-12 10:16:31,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 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) [2022-07-12 10:16:31,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,623 INFO L186 Difference]: Start difference. First operand has 244 places, 271 transitions, 602 flow. Second operand 3 states and 716 transitions. [2022-07-12 10:16:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 234 transitions, 562 flow [2022-07-12 10:16:31,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 234 transitions, 532 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:31,627 INFO L242 Difference]: Finished difference. Result has 246 places, 219 transitions, 478 flow [2022-07-12 10:16:31,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=478, PETRI_PLACES=246, PETRI_TRANSITIONS=219} [2022-07-12 10:16:31,628 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 2 predicate places. [2022-07-12 10:16:31,628 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 219 transitions, 478 flow [2022-07-12 10:16:31,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:31,628 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] [2022-07-12 10:16:31,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:16:31,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 639539648, now seen corresponding path program 1 times [2022-07-12 10:16:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885966046] [2022-07-12 10:16:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885966046] [2022-07-12 10:16:31,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885966046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116416828] [2022-07-12 10:16:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:31,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:31,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:31,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:16:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:31,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116416828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:31,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:31,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537858700] [2022-07-12 10:16:31,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:31,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-07-12 10:16:31,815 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 219 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,815 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:31,815 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-07-12 10:16:31,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:31,928 INFO L129 PetriNetUnfolder]: 0/306 cut-off events. [2022-07-12 10:16:31,929 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:16:31,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 306 events. 0/306 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 798 event pairs, 0 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:31,930 INFO L132 encePairwiseOnDemand]: 265/271 looper letters, 16 selfloop transitions, 9 changer transitions 0/229 dead transitions. [2022-07-12 10:16:31,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 229 transitions, 550 flow [2022-07-12 10:16:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1971 transitions. [2022-07-12 10:16:31,934 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8081180811808119 [2022-07-12 10:16:31,934 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1971 transitions. [2022-07-12 10:16:31,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1971 transitions. [2022-07-12 10:16:31,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:31,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1971 transitions. [2022-07-12 10:16:31,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,943 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 271.0) internal successors, (2710), 10 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,944 INFO L186 Difference]: Start difference. First operand has 246 places, 219 transitions, 478 flow. Second operand 9 states and 1971 transitions. [2022-07-12 10:16:31,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 229 transitions, 550 flow [2022-07-12 10:16:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 229 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:31,948 INFO L242 Difference]: Finished difference. Result has 244 places, 225 transitions, 526 flow [2022-07-12 10:16:31,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=526, PETRI_PLACES=244, PETRI_TRANSITIONS=225} [2022-07-12 10:16:31,949 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 0 predicate places. [2022-07-12 10:16:31,949 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 225 transitions, 526 flow [2022-07-12 10:16:31,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:31,950 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:31,950 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] [2022-07-12 10:16:31,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 10:16:32,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:32,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2089549643, now seen corresponding path program 1 times [2022-07-12 10:16:32,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451396820] [2022-07-12 10:16:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:32,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451396820] [2022-07-12 10:16:32,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451396820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593944771] [2022-07-12 10:16:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:32,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:32,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:32,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:16:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:32,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:32,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593944771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:32,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:32,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:32,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030931768] [2022-07-12 10:16:32,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:32,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:32,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:32,507 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 271 [2022-07-12 10:16:32,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 225 transitions, 526 flow. Second operand has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:32,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 271 [2022-07-12 10:16:32,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:32,694 INFO L129 PetriNetUnfolder]: 0/254 cut-off events. [2022-07-12 10:16:32,694 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:16:32,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-12 10:16:32,696 INFO L132 encePairwiseOnDemand]: 266/271 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-07-12 10:16:32,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 232 transitions, 660 flow [2022-07-12 10:16:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4580 transitions. [2022-07-12 10:16:32,701 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8047794763661922 [2022-07-12 10:16:32,702 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4580 transitions. [2022-07-12 10:16:32,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4580 transitions. [2022-07-12 10:16:32,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:32,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4580 transitions. [2022-07-12 10:16:32,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 218.0952380952381) internal successors, (4580), 21 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,717 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,718 INFO L186 Difference]: Start difference. First operand has 244 places, 225 transitions, 526 flow. Second operand 21 states and 4580 transitions. [2022-07-12 10:16:32,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 232 transitions, 660 flow [2022-07-12 10:16:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-12 10:16:32,723 INFO L242 Difference]: Finished difference. Result has 247 places, 221 transitions, 558 flow [2022-07-12 10:16:32,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=247, PETRI_TRANSITIONS=221} [2022-07-12 10:16:32,724 INFO L279 CegarLoopForPetriNet]: 244 programPoint places, 3 predicate places. [2022-07-12 10:16:32,724 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 221 transitions, 558 flow [2022-07-12 10:16:32,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 218.61111111111111) internal successors, (3935), 18 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:32,725 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:32,725 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:32,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 10:16:32,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-12 10:16:32,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1513194560, now seen corresponding path program 1 times [2022-07-12 10:16:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873848311] [2022-07-12 10:16:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:32,963 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:32,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:32,984 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:32,984 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:32,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:32,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-12 10:16:32,985 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:32,986 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:32,986 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:16:33,007 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:33,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 273 places, 304 transitions, 685 flow [2022-07-12 10:16:33,092 INFO L129 PetriNetUnfolder]: 74/572 cut-off events. [2022-07-12 10:16:33,093 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-12 10:16:33,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 572 events. 74/572 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2005 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 526. Up to 16 conditions per place. [2022-07-12 10:16:33,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 304 transitions, 685 flow [2022-07-12 10:16:33,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 304 transitions, 685 flow [2022-07-12 10:16:33,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:33,118 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:33,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:33,125 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-12 10:16:33,125 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:33,125 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:33,125 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] [2022-07-12 10:16:33,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1294590823, now seen corresponding path program 1 times [2022-07-12 10:16:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:33,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465594603] [2022-07-12 10:16:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:33,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465594603] [2022-07-12 10:16:33,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465594603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:33,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:33,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113713975] [2022-07-12 10:16:33,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:33,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 304 [2022-07-12 10:16:33,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 304 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:33,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 304 [2022-07-12 10:16:33,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:33,251 INFO L129 PetriNetUnfolder]: 0/465 cut-off events. [2022-07-12 10:16:33,252 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-12 10:16:33,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 465 events. 0/465 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1687 event pairs, 0 based on Foata normal form. 773/1224 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-12 10:16:33,253 INFO L132 encePairwiseOnDemand]: 255/304 looper letters, 16 selfloop transitions, 2 changer transitions 12/261 dead transitions. [2022-07-12 10:16:33,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 261 transitions, 635 flow [2022-07-12 10:16:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2022-07-12 10:16:33,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782894736842105 [2022-07-12 10:16:33,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2022-07-12 10:16:33,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2022-07-12 10:16:33,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:33,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2022-07-12 10:16:33,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,261 INFO L186 Difference]: Start difference. First operand has 273 places, 304 transitions, 685 flow. Second operand 3 states and 801 transitions. [2022-07-12 10:16:33,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 261 transitions, 635 flow [2022-07-12 10:16:33,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 261 transitions, 593 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:33,267 INFO L242 Difference]: Finished difference. Result has 275 places, 246 transitions, 537 flow [2022-07-12 10:16:33,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=275, PETRI_TRANSITIONS=246} [2022-07-12 10:16:33,267 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 2 predicate places. [2022-07-12 10:16:33,268 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 246 transitions, 537 flow [2022-07-12 10:16:33,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:33,268 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] [2022-07-12 10:16:33,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-12 10:16:33,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:33,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2052585952, now seen corresponding path program 1 times [2022-07-12 10:16:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:33,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114652676] [2022-07-12 10:16:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:33,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114652676] [2022-07-12 10:16:33,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114652676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710606065] [2022-07-12 10:16:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:33,308 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:33,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:16:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710606065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:33,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:33,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19653074] [2022-07-12 10:16:33,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:33,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:33,509 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-07-12 10:16:33,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 246 transitions, 537 flow. Second operand has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:33,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-07-12 10:16:33,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:33,647 INFO L129 PetriNetUnfolder]: 0/355 cut-off events. [2022-07-12 10:16:33,647 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:16:33,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 355 events. 0/355 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 979 event pairs, 0 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:33,648 INFO L132 encePairwiseOnDemand]: 298/304 looper letters, 17 selfloop transitions, 9 changer transitions 0/256 dead transitions. [2022-07-12 10:16:33,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 256 transitions, 611 flow [2022-07-12 10:16:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2206 transitions. [2022-07-12 10:16:33,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8062865497076024 [2022-07-12 10:16:33,651 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2206 transitions. [2022-07-12 10:16:33,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2206 transitions. [2022-07-12 10:16:33,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:33,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2206 transitions. [2022-07-12 10:16:33,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 245.11111111111111) internal successors, (2206), 9 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,658 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 304.0) internal successors, (3040), 10 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,658 INFO L186 Difference]: Start difference. First operand has 275 places, 246 transitions, 537 flow. Second operand 9 states and 2206 transitions. [2022-07-12 10:16:33,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 256 transitions, 611 flow [2022-07-12 10:16:33,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 256 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:33,663 INFO L242 Difference]: Finished difference. Result has 273 places, 252 transitions, 585 flow [2022-07-12 10:16:33,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=585, PETRI_PLACES=273, PETRI_TRANSITIONS=252} [2022-07-12 10:16:33,664 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 0 predicate places. [2022-07-12 10:16:33,664 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 252 transitions, 585 flow [2022-07-12 10:16:33,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.3) internal successors, (2443), 10 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:33,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:33,665 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] [2022-07-12 10:16:33,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 10:16:33,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash 900912405, now seen corresponding path program 1 times [2022-07-12 10:16:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:33,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505242455] [2022-07-12 10:16:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:33,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505242455] [2022-07-12 10:16:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505242455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947596046] [2022-07-12 10:16:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:33,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:33,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:33,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:16:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:34,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:34,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947596046] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:34,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:34,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997683470] [2022-07-12 10:16:34,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:34,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:34,189 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 304 [2022-07-12 10:16:34,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 252 transitions, 585 flow. Second operand has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:34,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 304 [2022-07-12 10:16:34,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:34,415 INFO L129 PetriNetUnfolder]: 0/303 cut-off events. [2022-07-12 10:16:34,415 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-07-12 10:16:34,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 303 events. 0/303 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 639 event pairs, 0 based on Foata normal form. 4/307 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:34,416 INFO L132 encePairwiseOnDemand]: 298/304 looper letters, 25 selfloop transitions, 21 changer transitions 0/276 dead transitions. [2022-07-12 10:16:34,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 276 transitions, 785 flow [2022-07-12 10:16:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5132 transitions. [2022-07-12 10:16:34,423 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8038847117794486 [2022-07-12 10:16:34,423 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5132 transitions. [2022-07-12 10:16:34,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5132 transitions. [2022-07-12 10:16:34,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:34,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5132 transitions. [2022-07-12 10:16:34,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 244.38095238095238) internal successors, (5132), 21 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,443 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 304.0) internal successors, (6688), 22 states have internal predecessors, (6688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,443 INFO L186 Difference]: Start difference. First operand has 273 places, 252 transitions, 585 flow. Second operand 21 states and 5132 transitions. [2022-07-12 10:16:34,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 276 transitions, 785 flow [2022-07-12 10:16:34,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 771 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:34,449 INFO L242 Difference]: Finished difference. Result has 297 places, 265 transitions, 709 flow [2022-07-12 10:16:34,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=709, PETRI_PLACES=297, PETRI_TRANSITIONS=265} [2022-07-12 10:16:34,450 INFO L279 CegarLoopForPetriNet]: 273 programPoint places, 24 predicate places. [2022-07-12 10:16:34,450 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 265 transitions, 709 flow [2022-07-12 10:16:34,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 244.61111111111111) internal successors, (4403), 18 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,451 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:34,451 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:34,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:34,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 10:16:34,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:34,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1779148577, now seen corresponding path program 1 times [2022-07-12 10:16:34,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:34,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349966831] [2022-07-12 10:16:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:34,685 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:34,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:34,707 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:34,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:34,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:34,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 10:16:34,707 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:16:34,708 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:34,708 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-12 10:16:34,729 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:34,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 302 places, 337 transitions, 770 flow [2022-07-12 10:16:34,816 INFO L129 PetriNetUnfolder]: 84/644 cut-off events. [2022-07-12 10:16:34,816 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-12 10:16:34,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 644 events. 84/644 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2266 event pairs, 0 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 606. Up to 18 conditions per place. [2022-07-12 10:16:34,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 337 transitions, 770 flow [2022-07-12 10:16:34,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 337 transitions, 770 flow [2022-07-12 10:16:34,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:34,836 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:34,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:34,841 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-12 10:16:34,842 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:34,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:34,842 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:34,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -180437562, now seen corresponding path program 1 times [2022-07-12 10:16:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352066004] [2022-07-12 10:16:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:34,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352066004] [2022-07-12 10:16:34,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352066004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:34,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393429535] [2022-07-12 10:16:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:34,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:34,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 337 [2022-07-12 10:16:34,858 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 337 transitions, 770 flow. Second operand has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:34,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 337 [2022-07-12 10:16:34,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:34,976 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2022-07-12 10:16:34,977 INFO L130 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-07-12 10:16:34,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 551 events. 0/551 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2092 event pairs, 0 based on Foata normal form. 212/745 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-07-12 10:16:34,978 INFO L132 encePairwiseOnDemand]: 285/337 looper letters, 8 selfloop transitions, 0 changer transitions 12/284 dead transitions. [2022-07-12 10:16:34,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 284 transitions, 680 flow [2022-07-12 10:16:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 612 transitions. [2022-07-12 10:16:34,980 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9080118694362018 [2022-07-12 10:16:34,980 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 612 transitions. [2022-07-12 10:16:34,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 612 transitions. [2022-07-12 10:16:34,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:34,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 612 transitions. [2022-07-12 10:16:34,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 306.0) internal successors, (612), 2 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,982 INFO L186 Difference]: Start difference. First operand has 302 places, 337 transitions, 770 flow. Second operand 2 states and 612 transitions. [2022-07-12 10:16:34,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 284 transitions, 680 flow [2022-07-12 10:16:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 284 transitions, 624 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:34,987 INFO L242 Difference]: Finished difference. Result has 302 places, 272 transitions, 584 flow [2022-07-12 10:16:34,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=584, PETRI_PLACES=302, PETRI_TRANSITIONS=272} [2022-07-12 10:16:34,987 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 0 predicate places. [2022-07-12 10:16:34,988 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 272 transitions, 584 flow [2022-07-12 10:16:34,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 276.5) internal successors, (553), 2 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:34,988 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:34,988 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] [2022-07-12 10:16:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:16:34,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash -473840569, now seen corresponding path program 1 times [2022-07-12 10:16:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117021336] [2022-07-12 10:16:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117021336] [2022-07-12 10:16:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117021336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:35,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:35,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:35,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199767444] [2022-07-12 10:16:35,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:35,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:35,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:35,008 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 337 [2022-07-12 10:16:35,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 272 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:35,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 337 [2022-07-12 10:16:35,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:35,100 INFO L129 PetriNetUnfolder]: 0/430 cut-off events. [2022-07-12 10:16:35,101 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:16:35,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 430 events. 0/430 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1318 event pairs, 0 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-12 10:16:35,102 INFO L132 encePairwiseOnDemand]: 334/337 looper letters, 17 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2022-07-12 10:16:35,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 276 transitions, 630 flow [2022-07-12 10:16:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 827 transitions. [2022-07-12 10:16:35,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8180019782393669 [2022-07-12 10:16:35,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 827 transitions. [2022-07-12 10:16:35,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 827 transitions. [2022-07-12 10:16:35,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:35,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 827 transitions. [2022-07-12 10:16:35,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,108 INFO L186 Difference]: Start difference. First operand has 302 places, 272 transitions, 584 flow. Second operand 3 states and 827 transitions. [2022-07-12 10:16:35,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 276 transitions, 630 flow [2022-07-12 10:16:35,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 276 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:35,113 INFO L242 Difference]: Finished difference. Result has 293 places, 273 transitions, 596 flow [2022-07-12 10:16:35,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=596, PETRI_PLACES=293, PETRI_TRANSITIONS=273} [2022-07-12 10:16:35,114 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-07-12 10:16:35,114 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 273 transitions, 596 flow [2022-07-12 10:16:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,115 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:35,115 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] [2022-07-12 10:16:35,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:16:35,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:35,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1853817472, now seen corresponding path program 1 times [2022-07-12 10:16:35,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:35,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408641250] [2022-07-12 10:16:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:35,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408641250] [2022-07-12 10:16:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408641250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105413405] [2022-07-12 10:16:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:35,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:35,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:35,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:16:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:35,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105413405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:35,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:35,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697163325] [2022-07-12 10:16:35,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:35,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:35,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-12 10:16:35,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 273 transitions, 596 flow. Second operand has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:35,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-12 10:16:35,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:35,468 INFO L129 PetriNetUnfolder]: 0/404 cut-off events. [2022-07-12 10:16:35,468 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:16:35,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 404 events. 0/404 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1169 event pairs, 0 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:16:35,469 INFO L132 encePairwiseOnDemand]: 331/337 looper letters, 18 selfloop transitions, 9 changer transitions 0/283 dead transitions. [2022-07-12 10:16:35,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 283 transitions, 672 flow [2022-07-12 10:16:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2441 transitions. [2022-07-12 10:16:35,472 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048137157929443 [2022-07-12 10:16:35,473 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2441 transitions. [2022-07-12 10:16:35,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2441 transitions. [2022-07-12 10:16:35,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:35,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2441 transitions. [2022-07-12 10:16:35,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.22222222222223) internal successors, (2441), 9 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,481 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 337.0) internal successors, (3370), 10 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,481 INFO L186 Difference]: Start difference. First operand has 293 places, 273 transitions, 596 flow. Second operand 9 states and 2441 transitions. [2022-07-12 10:16:35,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 283 transitions, 672 flow [2022-07-12 10:16:35,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 283 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:35,487 INFO L242 Difference]: Finished difference. Result has 303 places, 279 transitions, 644 flow [2022-07-12 10:16:35,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=303, PETRI_TRANSITIONS=279} [2022-07-12 10:16:35,488 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 1 predicate places. [2022-07-12 10:16:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 279 transitions, 644 flow [2022-07-12 10:16:35,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 270.3) internal successors, (2703), 10 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:35,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:35,489 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] [2022-07-12 10:16:35,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 10:16:35,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776885, now seen corresponding path program 1 times [2022-07-12 10:16:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021531255] [2022-07-12 10:16:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:35,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021531255] [2022-07-12 10:16:35,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021531255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:35,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83104823] [2022-07-12 10:16:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:35,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:35,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:35,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:16:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:35,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:35,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83104823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:36,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:36,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:36,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693927778] [2022-07-12 10:16:36,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:36,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:36,079 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-12 10:16:36,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 279 transitions, 644 flow. Second operand has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:36,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-12 10:16:36,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:36,334 INFO L129 PetriNetUnfolder]: 0/352 cut-off events. [2022-07-12 10:16:36,335 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-07-12 10:16:36,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 352 events. 0/352 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 822 event pairs, 0 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:16:36,336 INFO L132 encePairwiseOnDemand]: 331/337 looper letters, 26 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2022-07-12 10:16:36,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 303 transitions, 846 flow [2022-07-12 10:16:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5679 transitions. [2022-07-12 10:16:36,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8024586689275116 [2022-07-12 10:16:36,341 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5679 transitions. [2022-07-12 10:16:36,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5679 transitions. [2022-07-12 10:16:36,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:36,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5679 transitions. [2022-07-12 10:16:36,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.42857142857144) internal successors, (5679), 21 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,357 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 337.0) internal successors, (7414), 22 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,357 INFO L186 Difference]: Start difference. First operand has 303 places, 279 transitions, 644 flow. Second operand 21 states and 5679 transitions. [2022-07-12 10:16:36,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 303 transitions, 846 flow [2022-07-12 10:16:36,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 303 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:36,364 INFO L242 Difference]: Finished difference. Result has 327 places, 292 transitions, 768 flow [2022-07-12 10:16:36,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=768, PETRI_PLACES=327, PETRI_TRANSITIONS=292} [2022-07-12 10:16:36,365 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-07-12 10:16:36,365 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 292 transitions, 768 flow [2022-07-12 10:16:36,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 270.6111111111111) internal successors, (4871), 18 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:36,366 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:36,366 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:36,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:36,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 10:16:36,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1304864171, now seen corresponding path program 1 times [2022-07-12 10:16:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:36,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807549149] [2022-07-12 10:16:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:36,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807549149] [2022-07-12 10:16:36,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807549149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:36,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932449510] [2022-07-12 10:16:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:36,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:36,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:36,715 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:36,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:16:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:36,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:36,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:37,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932449510] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:37,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:37,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:37,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185257751] [2022-07-12 10:16:37,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:37,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:37,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:37,255 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 337 [2022-07-12 10:16:37,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 292 transitions, 768 flow. Second operand has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:37,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 337 [2022-07-12 10:16:37,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:37,573 INFO L129 PetriNetUnfolder]: 0/326 cut-off events. [2022-07-12 10:16:37,573 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-07-12 10:16:37,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-07-12 10:16:37,575 INFO L132 encePairwiseOnDemand]: 332/337 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-07-12 10:16:37,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-07-12 10:16:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:16:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:16:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7290 transitions. [2022-07-12 10:16:37,582 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8011869436201781 [2022-07-12 10:16:37,582 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7290 transitions. [2022-07-12 10:16:37,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7290 transitions. [2022-07-12 10:16:37,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:37,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7290 transitions. [2022-07-12 10:16:37,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,603 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 337.0) internal successors, (9436), 28 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,603 INFO L186 Difference]: Start difference. First operand has 327 places, 292 transitions, 768 flow. Second operand 27 states and 7290 transitions. [2022-07-12 10:16:37,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-07-12 10:16:37,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:37,609 INFO L242 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-07-12 10:16:37,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-07-12 10:16:37,611 INFO L279 CegarLoopForPetriNet]: 302 programPoint places, 25 predicate places. [2022-07-12 10:16:37,611 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-07-12 10:16:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 270.79411764705884) internal successors, (9207), 34 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:37,612 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:37,612 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:37,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:37,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-12 10:16:37,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1236984545, now seen corresponding path program 1 times [2022-07-12 10:16:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049040173] [2022-07-12 10:16:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:37,856 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:37,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:37,882 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:37,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:37,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:37,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:16:37,883 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:16:37,883 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:37,883 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-12 10:16:37,909 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:37,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 331 places, 370 transitions, 857 flow [2022-07-12 10:16:38,031 INFO L129 PetriNetUnfolder]: 94/716 cut-off events. [2022-07-12 10:16:38,031 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-12 10:16:38,052 INFO L84 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 716 events. 94/716 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2535 event pairs, 0 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 687. Up to 20 conditions per place. [2022-07-12 10:16:38,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 370 transitions, 857 flow [2022-07-12 10:16:38,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 370 transitions, 857 flow [2022-07-12 10:16:38,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:38,093 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:38,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:38,098 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-12 10:16:38,098 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:38,098 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:38,098 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] [2022-07-12 10:16:38,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash -210332282, now seen corresponding path program 1 times [2022-07-12 10:16:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:38,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001228642] [2022-07-12 10:16:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:38,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001228642] [2022-07-12 10:16:38,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001228642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:38,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:38,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552982678] [2022-07-12 10:16:38,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:38,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 370 [2022-07-12 10:16:38,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 370 transitions, 857 flow. Second operand has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:38,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 370 [2022-07-12 10:16:38,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:38,232 INFO L129 PetriNetUnfolder]: 0/612 cut-off events. [2022-07-12 10:16:38,232 INFO L130 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2022-07-12 10:16:38,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 612 events. 0/612 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2366 event pairs, 0 based on Foata normal form. 264/856 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2022-07-12 10:16:38,234 INFO L132 encePairwiseOnDemand]: 312/370 looper letters, 9 selfloop transitions, 0 changer transitions 12/311 dead transitions. [2022-07-12 10:16:38,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 311 transitions, 757 flow [2022-07-12 10:16:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 671 transitions. [2022-07-12 10:16:38,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9067567567567567 [2022-07-12 10:16:38,236 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 671 transitions. [2022-07-12 10:16:38,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 671 transitions. [2022-07-12 10:16:38,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:38,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 671 transitions. [2022-07-12 10:16:38,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 335.5) internal successors, (671), 2 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,239 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,239 INFO L186 Difference]: Start difference. First operand has 331 places, 370 transitions, 857 flow. Second operand 2 states and 671 transitions. [2022-07-12 10:16:38,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 311 transitions, 757 flow [2022-07-12 10:16:38,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 311 transitions, 685 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:38,244 INFO L242 Difference]: Finished difference. Result has 331 places, 299 transitions, 643 flow [2022-07-12 10:16:38,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=643, PETRI_PLACES=331, PETRI_TRANSITIONS=299} [2022-07-12 10:16:38,245 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 0 predicate places. [2022-07-12 10:16:38,245 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 299 transitions, 643 flow [2022-07-12 10:16:38,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:38,246 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] [2022-07-12 10:16:38,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 10:16:38,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash -503735289, now seen corresponding path program 1 times [2022-07-12 10:16:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727605691] [2022-07-12 10:16:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727605691] [2022-07-12 10:16:38,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727605691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:38,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:38,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:38,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494402150] [2022-07-12 10:16:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:38,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:38,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:38,267 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 370 [2022-07-12 10:16:38,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 299 transitions, 643 flow. Second operand has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:38,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 370 [2022-07-12 10:16:38,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:38,375 INFO L129 PetriNetUnfolder]: 0/479 cut-off events. [2022-07-12 10:16:38,375 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:16:38,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 479 events. 0/479 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1504 event pairs, 0 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-12 10:16:38,377 INFO L132 encePairwiseOnDemand]: 367/370 looper letters, 18 selfloop transitions, 2 changer transitions 0/303 dead transitions. [2022-07-12 10:16:38,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 303 transitions, 691 flow [2022-07-12 10:16:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2022-07-12 10:16:38,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8162162162162162 [2022-07-12 10:16:38,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2022-07-12 10:16:38,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2022-07-12 10:16:38,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:38,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2022-07-12 10:16:38,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 370.0) internal successors, (1480), 4 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,381 INFO L186 Difference]: Start difference. First operand has 331 places, 299 transitions, 643 flow. Second operand 3 states and 906 transitions. [2022-07-12 10:16:38,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 303 transitions, 691 flow [2022-07-12 10:16:38,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 303 transitions, 691 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:38,386 INFO L242 Difference]: Finished difference. Result has 322 places, 300 transitions, 655 flow [2022-07-12 10:16:38,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=655, PETRI_PLACES=322, PETRI_TRANSITIONS=300} [2022-07-12 10:16:38,390 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, -9 predicate places. [2022-07-12 10:16:38,390 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 300 transitions, 655 flow [2022-07-12 10:16:38,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,391 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:38,391 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] [2022-07-12 10:16:38,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-12 10:16:38,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1805231264, now seen corresponding path program 1 times [2022-07-12 10:16:38,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985586380] [2022-07-12 10:16:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:38,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985586380] [2022-07-12 10:16:38,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985586380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:38,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201037737] [2022-07-12 10:16:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:38,428 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:38,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:16:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:38,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201037737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:38,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:38,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170613243] [2022-07-12 10:16:38,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:38,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:38,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:38,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:38,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-12 10:16:38,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 300 transitions, 655 flow. Second operand has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:38,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-12 10:16:38,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:38,778 INFO L129 PetriNetUnfolder]: 0/453 cut-off events. [2022-07-12 10:16:38,778 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-12 10:16:38,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 453 events. 0/453 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1345 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:16:38,780 INFO L132 encePairwiseOnDemand]: 364/370 looper letters, 19 selfloop transitions, 9 changer transitions 0/310 dead transitions. [2022-07-12 10:16:38,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 310 transitions, 733 flow [2022-07-12 10:16:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2676 transitions. [2022-07-12 10:16:38,786 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8036036036036036 [2022-07-12 10:16:38,786 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2676 transitions. [2022-07-12 10:16:38,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2676 transitions. [2022-07-12 10:16:38,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:38,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2676 transitions. [2022-07-12 10:16:38,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 297.3333333333333) internal successors, (2676), 9 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,793 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 370.0) internal successors, (3700), 10 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,793 INFO L186 Difference]: Start difference. First operand has 322 places, 300 transitions, 655 flow. Second operand 9 states and 2676 transitions. [2022-07-12 10:16:38,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 310 transitions, 733 flow [2022-07-12 10:16:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 310 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:38,798 INFO L242 Difference]: Finished difference. Result has 332 places, 306 transitions, 703 flow [2022-07-12 10:16:38,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=332, PETRI_TRANSITIONS=306} [2022-07-12 10:16:38,801 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 1 predicate places. [2022-07-12 10:16:38,801 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 306 transitions, 703 flow [2022-07-12 10:16:38,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 296.3) internal successors, (2963), 10 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:38,801 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:38,802 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] [2022-07-12 10:16:38,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:39,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash 484043797, now seen corresponding path program 1 times [2022-07-12 10:16:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:39,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287079064] [2022-07-12 10:16:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:39,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:39,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287079064] [2022-07-12 10:16:39,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287079064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:39,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577083901] [2022-07-12 10:16:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:39,095 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:39,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:16:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:39,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:39,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:39,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577083901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:39,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:39,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124712243] [2022-07-12 10:16:39,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:39,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:39,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:39,401 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-12 10:16:39,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 306 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:39,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-12 10:16:39,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:39,669 INFO L129 PetriNetUnfolder]: 0/401 cut-off events. [2022-07-12 10:16:39,669 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:16:39,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 401 events. 0/401 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1006 event pairs, 0 based on Foata normal form. 4/405 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:39,671 INFO L132 encePairwiseOnDemand]: 364/370 looper letters, 27 selfloop transitions, 21 changer transitions 0/330 dead transitions. [2022-07-12 10:16:39,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 330 transitions, 907 flow [2022-07-12 10:16:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6226 transitions. [2022-07-12 10:16:39,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8012870012870013 [2022-07-12 10:16:39,677 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6226 transitions. [2022-07-12 10:16:39,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6226 transitions. [2022-07-12 10:16:39,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:39,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6226 transitions. [2022-07-12 10:16:39,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 296.4761904761905) internal successors, (6226), 21 states have internal predecessors, (6226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,692 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 370.0) internal successors, (8140), 22 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,693 INFO L186 Difference]: Start difference. First operand has 332 places, 306 transitions, 703 flow. Second operand 21 states and 6226 transitions. [2022-07-12 10:16:39,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 330 transitions, 907 flow [2022-07-12 10:16:39,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 330 transitions, 893 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:39,699 INFO L242 Difference]: Finished difference. Result has 356 places, 319 transitions, 827 flow [2022-07-12 10:16:39,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=827, PETRI_PLACES=356, PETRI_TRANSITIONS=319} [2022-07-12 10:16:39,700 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 25 predicate places. [2022-07-12 10:16:39,700 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 319 transitions, 827 flow [2022-07-12 10:16:39,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 296.6111111111111) internal successors, (5339), 18 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:39,701 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:39,701 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:39,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:39,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-12 10:16:39,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:39,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1803030795, now seen corresponding path program 1 times [2022-07-12 10:16:39,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:39,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805992482] [2022-07-12 10:16:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:40,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805992482] [2022-07-12 10:16:40,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805992482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:40,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525723667] [2022-07-12 10:16:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:40,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:40,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:40,056 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:40,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:16:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:40,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:40,280 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:40,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525723667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:40,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:40,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618150902] [2022-07-12 10:16:40,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:40,552 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 370 [2022-07-12 10:16:40,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 319 transitions, 827 flow. Second operand has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:40,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 370 [2022-07-12 10:16:40,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:40,882 INFO L129 PetriNetUnfolder]: 0/362 cut-off events. [2022-07-12 10:16:40,883 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-12 10:16:40,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:40,884 INFO L132 encePairwiseOnDemand]: 365/370 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-07-12 10:16:40,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 328 transitions, 1017 flow [2022-07-12 10:16:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 10:16:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-12 10:16:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8881 transitions. [2022-07-12 10:16:40,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8000900900900901 [2022-07-12 10:16:40,892 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8881 transitions. [2022-07-12 10:16:40,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8881 transitions. [2022-07-12 10:16:40,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:40,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8881 transitions. [2022-07-12 10:16:40,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 296.03333333333336) internal successors, (8881), 30 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,913 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 370.0) internal successors, (11470), 31 states have internal predecessors, (11470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,913 INFO L186 Difference]: Start difference. First operand has 356 places, 319 transitions, 827 flow. Second operand 30 states and 8881 transitions. [2022-07-12 10:16:40,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 328 transitions, 1017 flow [2022-07-12 10:16:40,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:40,920 INFO L242 Difference]: Finished difference. Result has 359 places, 312 transitions, 834 flow [2022-07-12 10:16:40,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=370, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=359, PETRI_TRANSITIONS=312} [2022-07-12 10:16:40,921 INFO L279 CegarLoopForPetriNet]: 331 programPoint places, 28 predicate places. [2022-07-12 10:16:40,921 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 312 transitions, 834 flow [2022-07-12 10:16:40,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 296.79411764705884) internal successors, (10091), 34 states have internal predecessors, (10091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:40,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:40,923 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:40,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-12 10:16:41,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-12 10:16:41,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash 226570656, now seen corresponding path program 1 times [2022-07-12 10:16:41,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91123111] [2022-07-12 10:16:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:41,170 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:41,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:41,205 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:41,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:41,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:41,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-12 10:16:41,205 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:16:41,206 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:41,206 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-12 10:16:41,231 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:41,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 360 places, 403 transitions, 946 flow [2022-07-12 10:16:41,395 INFO L129 PetriNetUnfolder]: 104/788 cut-off events. [2022-07-12 10:16:41,395 INFO L130 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-07-12 10:16:41,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 788 events. 104/788 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2829 event pairs, 0 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 769. Up to 22 conditions per place. [2022-07-12 10:16:41,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 403 transitions, 946 flow [2022-07-12 10:16:41,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 403 transitions, 946 flow [2022-07-12 10:16:41,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:41,425 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:41,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:41,433 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-12 10:16:41,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:41,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:41,433 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] [2022-07-12 10:16:41,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1498309670, now seen corresponding path program 1 times [2022-07-12 10:16:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654657541] [2022-07-12 10:16:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:41,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:41,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654657541] [2022-07-12 10:16:41,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654657541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:41,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:41,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:41,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132128906] [2022-07-12 10:16:41,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:41,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:41,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:41,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:41,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:41,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 403 [2022-07-12 10:16:41,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 403 transitions, 946 flow. Second operand has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:41,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 403 [2022-07-12 10:16:41,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:41,612 INFO L129 PetriNetUnfolder]: 0/673 cut-off events. [2022-07-12 10:16:41,612 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-12 10:16:41,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 673 events. 0/673 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2590 event pairs, 0 based on Foata normal form. 322/973 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-12 10:16:41,614 INFO L132 encePairwiseOnDemand]: 339/403 looper letters, 10 selfloop transitions, 0 changer transitions 12/338 dead transitions. [2022-07-12 10:16:41,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 338 transitions, 836 flow [2022-07-12 10:16:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 730 transitions. [2022-07-12 10:16:41,616 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9057071960297767 [2022-07-12 10:16:41,616 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 730 transitions. [2022-07-12 10:16:41,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 730 transitions. [2022-07-12 10:16:41,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:41,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 730 transitions. [2022-07-12 10:16:41,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 365.0) internal successors, (730), 2 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,619 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,619 INFO L186 Difference]: Start difference. First operand has 360 places, 403 transitions, 946 flow. Second operand 2 states and 730 transitions. [2022-07-12 10:16:41,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 338 transitions, 836 flow [2022-07-12 10:16:41,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 338 transitions, 746 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:41,625 INFO L242 Difference]: Finished difference. Result has 360 places, 326 transitions, 702 flow [2022-07-12 10:16:41,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=702, PETRI_PLACES=360, PETRI_TRANSITIONS=326} [2022-07-12 10:16:41,626 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 0 predicate places. [2022-07-12 10:16:41,626 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 326 transitions, 702 flow [2022-07-12 10:16:41,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 328.5) internal successors, (657), 2 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,626 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:41,627 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] [2022-07-12 10:16:41,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-12 10:16:41,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:41,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1204906663, now seen corresponding path program 1 times [2022-07-12 10:16:41,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:41,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158536421] [2022-07-12 10:16:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:41,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158536421] [2022-07-12 10:16:41,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158536421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:41,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:41,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113361815] [2022-07-12 10:16:41,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:41,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:41,647 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 403 [2022-07-12 10:16:41,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 326 transitions, 702 flow. Second operand has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:41,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 403 [2022-07-12 10:16:41,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:41,829 INFO L129 PetriNetUnfolder]: 0/528 cut-off events. [2022-07-12 10:16:41,829 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:16:41,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 528 events. 0/528 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1685 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-12 10:16:41,830 INFO L132 encePairwiseOnDemand]: 400/403 looper letters, 19 selfloop transitions, 2 changer transitions 0/330 dead transitions. [2022-07-12 10:16:41,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 330 transitions, 752 flow [2022-07-12 10:16:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2022-07-12 10:16:41,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8147229114971051 [2022-07-12 10:16:41,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 985 transitions. [2022-07-12 10:16:41,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 985 transitions. [2022-07-12 10:16:41,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:41,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 985 transitions. [2022-07-12 10:16:41,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,836 INFO L186 Difference]: Start difference. First operand has 360 places, 326 transitions, 702 flow. Second operand 3 states and 985 transitions. [2022-07-12 10:16:41,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 330 transitions, 752 flow [2022-07-12 10:16:41,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 330 transitions, 752 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:41,841 INFO L242 Difference]: Finished difference. Result has 351 places, 327 transitions, 714 flow [2022-07-12 10:16:41,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=351, PETRI_TRANSITIONS=327} [2022-07-12 10:16:41,841 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, -9 predicate places. [2022-07-12 10:16:41,842 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 327 transitions, 714 flow [2022-07-12 10:16:41,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:41,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:41,842 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:41,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-12 10:16:41,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 144830272, now seen corresponding path program 1 times [2022-07-12 10:16:41,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:41,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403086847] [2022-07-12 10:16:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:41,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:41,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403086847] [2022-07-12 10:16:41,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403086847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183796556] [2022-07-12 10:16:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:41,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:41,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:41,872 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:41,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:16:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:42,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183796556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:42,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:42,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:42,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137964212] [2022-07-12 10:16:42,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:42,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:42,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:42,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-12 10:16:42,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 327 transitions, 714 flow. Second operand has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:42,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-12 10:16:42,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:42,237 INFO L129 PetriNetUnfolder]: 0/502 cut-off events. [2022-07-12 10:16:42,238 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-07-12 10:16:42,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 502 events. 0/502 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1531 event pairs, 0 based on Foata normal form. 2/504 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:16:42,240 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 20 selfloop transitions, 9 changer transitions 0/337 dead transitions. [2022-07-12 10:16:42,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 337 transitions, 794 flow [2022-07-12 10:16:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2911 transitions. [2022-07-12 10:16:42,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8025916735594155 [2022-07-12 10:16:42,244 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2911 transitions. [2022-07-12 10:16:42,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2911 transitions. [2022-07-12 10:16:42,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:42,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2911 transitions. [2022-07-12 10:16:42,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 323.44444444444446) internal successors, (2911), 9 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,250 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 403.0) internal successors, (4030), 10 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,250 INFO L186 Difference]: Start difference. First operand has 351 places, 327 transitions, 714 flow. Second operand 9 states and 2911 transitions. [2022-07-12 10:16:42,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 337 transitions, 794 flow [2022-07-12 10:16:42,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 337 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:42,257 INFO L242 Difference]: Finished difference. Result has 361 places, 333 transitions, 762 flow [2022-07-12 10:16:42,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=361, PETRI_TRANSITIONS=333} [2022-07-12 10:16:42,258 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 1 predicate places. [2022-07-12 10:16:42,258 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 333 transitions, 762 flow [2022-07-12 10:16:42,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 322.3) internal successors, (3223), 10 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:42,259 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] [2022-07-12 10:16:42,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:42,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1371680437, now seen corresponding path program 1 times [2022-07-12 10:16:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:42,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219634580] [2022-07-12 10:16:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:42,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219634580] [2022-07-12 10:16:42,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219634580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:42,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101010781] [2022-07-12 10:16:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:42,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:42,541 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:42,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 10:16:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:42,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:42,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101010781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:42,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:42,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440840677] [2022-07-12 10:16:42,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:42,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:42,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-12 10:16:42,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 333 transitions, 762 flow. Second operand has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:42,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:42,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-12 10:16:42,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:43,142 INFO L129 PetriNetUnfolder]: 0/450 cut-off events. [2022-07-12 10:16:43,143 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-12 10:16:43,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 450 events. 0/450 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1190 event pairs, 0 based on Foata normal form. 4/454 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:43,144 INFO L132 encePairwiseOnDemand]: 397/403 looper letters, 28 selfloop transitions, 21 changer transitions 0/357 dead transitions. [2022-07-12 10:16:43,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 357 transitions, 968 flow [2022-07-12 10:16:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6773 transitions. [2022-07-12 10:16:43,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003072196620584 [2022-07-12 10:16:43,150 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6773 transitions. [2022-07-12 10:16:43,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6773 transitions. [2022-07-12 10:16:43,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:43,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6773 transitions. [2022-07-12 10:16:43,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 322.5238095238095) internal successors, (6773), 21 states have internal predecessors, (6773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,166 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 403.0) internal successors, (8866), 22 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,166 INFO L186 Difference]: Start difference. First operand has 361 places, 333 transitions, 762 flow. Second operand 21 states and 6773 transitions. [2022-07-12 10:16:43,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 357 transitions, 968 flow [2022-07-12 10:16:43,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 357 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:43,173 INFO L242 Difference]: Finished difference. Result has 385 places, 346 transitions, 886 flow [2022-07-12 10:16:43,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=886, PETRI_PLACES=385, PETRI_TRANSITIONS=346} [2022-07-12 10:16:43,174 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 25 predicate places. [2022-07-12 10:16:43,174 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 346 transitions, 886 flow [2022-07-12 10:16:43,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 322.6111111111111) internal successors, (5807), 18 states have internal predecessors, (5807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:43,175 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:43,176 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:43,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:43,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash -149142613, now seen corresponding path program 1 times [2022-07-12 10:16:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:43,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758250344] [2022-07-12 10:16:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:43,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758250344] [2022-07-12 10:16:43,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758250344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986335858] [2022-07-12 10:16:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:43,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:43,529 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:43,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 10:16:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:43,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:44,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986335858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:44,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:44,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003564222] [2022-07-12 10:16:44,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:44,099 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 403 [2022-07-12 10:16:44,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 346 transitions, 886 flow. Second operand has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:44,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 403 [2022-07-12 10:16:44,104 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:44,512 INFO L129 PetriNetUnfolder]: 0/398 cut-off events. [2022-07-12 10:16:44,512 INFO L130 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-07-12 10:16:44,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-12 10:16:44,513 INFO L132 encePairwiseOnDemand]: 398/403 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-07-12 10:16:44,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-07-12 10:16:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 10:16:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-12 10:16:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10628 transitions. [2022-07-12 10:16:44,526 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7991578314158959 [2022-07-12 10:16:44,526 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10628 transitions. [2022-07-12 10:16:44,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10628 transitions. [2022-07-12 10:16:44,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:44,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10628 transitions. [2022-07-12 10:16:44,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 322.06060606060606) internal successors, (10628), 33 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,548 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 403.0) internal successors, (13702), 34 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,548 INFO L186 Difference]: Start difference. First operand has 385 places, 346 transitions, 886 flow. Second operand 33 states and 10628 transitions. [2022-07-12 10:16:44,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-07-12 10:16:44,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:44,555 INFO L242 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-07-12 10:16:44,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-07-12 10:16:44,556 INFO L279 CegarLoopForPetriNet]: 360 programPoint places, 31 predicate places. [2022-07-12 10:16:44,556 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-07-12 10:16:44,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 322.79411764705884) internal successors, (10975), 34 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:44,558 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:44,558 INFO L200 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:44,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:44,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:44,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1786652926, now seen corresponding path program 1 times [2022-07-12 10:16:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:44,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662595667] [2022-07-12 10:16:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:44,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:44,796 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:44,828 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:44,829 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:44,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:44,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-12 10:16:44,829 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:16:44,830 WARN L231 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:44,830 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-07-12 10:16:44,856 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:44,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 389 places, 436 transitions, 1037 flow [2022-07-12 10:16:45,018 INFO L129 PetriNetUnfolder]: 114/860 cut-off events. [2022-07-12 10:16:45,018 INFO L130 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-07-12 10:16:45,049 INFO L84 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 860 events. 114/860 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3087 event pairs, 0 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 852. Up to 24 conditions per place. [2022-07-12 10:16:45,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 436 transitions, 1037 flow [2022-07-12 10:16:45,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 436 transitions, 1037 flow [2022-07-12 10:16:45,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:45,064 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:45,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:45,068 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-12 10:16:45,069 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:45,069 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:45,069 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] [2022-07-12 10:16:45,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash 650520998, now seen corresponding path program 1 times [2022-07-12 10:16:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:45,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903923264] [2022-07-12 10:16:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:45,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:45,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903923264] [2022-07-12 10:16:45,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903923264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:45,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:45,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:45,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151955469] [2022-07-12 10:16:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:45,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:45,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:45,113 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 436 [2022-07-12 10:16:45,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 436 transitions, 1037 flow. Second operand has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,114 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:45,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 436 [2022-07-12 10:16:45,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:45,304 INFO L129 PetriNetUnfolder]: 0/734 cut-off events. [2022-07-12 10:16:45,304 INFO L130 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-07-12 10:16:45,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 734 events. 0/734 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 2888 event pairs, 0 based on Foata normal form. 386/1096 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-12 10:16:45,305 INFO L132 encePairwiseOnDemand]: 366/436 looper letters, 11 selfloop transitions, 0 changer transitions 12/365 dead transitions. [2022-07-12 10:16:45,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 365 transitions, 917 flow [2022-07-12 10:16:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 789 transitions. [2022-07-12 10:16:45,307 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9048165137614679 [2022-07-12 10:16:45,307 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 789 transitions. [2022-07-12 10:16:45,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 789 transitions. [2022-07-12 10:16:45,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:45,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 789 transitions. [2022-07-12 10:16:45,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.5) internal successors, (789), 2 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,309 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 436.0) internal successors, (1308), 3 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,310 INFO L186 Difference]: Start difference. First operand has 389 places, 436 transitions, 1037 flow. Second operand 2 states and 789 transitions. [2022-07-12 10:16:45,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 365 transitions, 917 flow [2022-07-12 10:16:45,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 365 transitions, 807 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:45,316 INFO L242 Difference]: Finished difference. Result has 389 places, 353 transitions, 761 flow [2022-07-12 10:16:45,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=761, PETRI_PLACES=389, PETRI_TRANSITIONS=353} [2022-07-12 10:16:45,317 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 0 predicate places. [2022-07-12 10:16:45,317 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 353 transitions, 761 flow [2022-07-12 10:16:45,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 354.5) internal successors, (709), 2 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:45,318 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] [2022-07-12 10:16:45,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-12 10:16:45,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 357117991, now seen corresponding path program 1 times [2022-07-12 10:16:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:45,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915756852] [2022-07-12 10:16:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:45,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:45,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915756852] [2022-07-12 10:16:45,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915756852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:45,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:45,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:45,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916835299] [2022-07-12 10:16:45,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:45,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:45,339 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 436 [2022-07-12 10:16:45,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 353 transitions, 761 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:45,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 436 [2022-07-12 10:16:45,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:45,469 INFO L129 PetriNetUnfolder]: 0/577 cut-off events. [2022-07-12 10:16:45,470 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-12 10:16:45,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 577 events. 0/577 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1872 event pairs, 0 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-07-12 10:16:45,471 INFO L132 encePairwiseOnDemand]: 433/436 looper letters, 20 selfloop transitions, 2 changer transitions 0/357 dead transitions. [2022-07-12 10:16:45,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 357 transitions, 813 flow [2022-07-12 10:16:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1064 transitions. [2022-07-12 10:16:45,473 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8134556574923547 [2022-07-12 10:16:45,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1064 transitions. [2022-07-12 10:16:45,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1064 transitions. [2022-07-12 10:16:45,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:45,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1064 transitions. [2022-07-12 10:16:45,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,476 INFO L186 Difference]: Start difference. First operand has 389 places, 353 transitions, 761 flow. Second operand 3 states and 1064 transitions. [2022-07-12 10:16:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 357 transitions, 813 flow [2022-07-12 10:16:45,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 357 transitions, 813 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:45,482 INFO L242 Difference]: Finished difference. Result has 380 places, 354 transitions, 773 flow [2022-07-12 10:16:45,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=773, PETRI_PLACES=380, PETRI_TRANSITIONS=354} [2022-07-12 10:16:45,483 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, -9 predicate places. [2022-07-12 10:16:45,483 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 354 transitions, 773 flow [2022-07-12 10:16:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:45,484 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] [2022-07-12 10:16:45,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-12 10:16:45,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1754914144, now seen corresponding path program 1 times [2022-07-12 10:16:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:45,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239159593] [2022-07-12 10:16:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:45,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:45,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239159593] [2022-07-12 10:16:45,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239159593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:45,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479330061] [2022-07-12 10:16:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:45,512 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:45,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 10:16:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:45,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:45,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479330061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:45,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:45,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292632008] [2022-07-12 10:16:45,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:45,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:45,741 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-12 10:16:45,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 354 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:45,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-12 10:16:45,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:45,961 INFO L129 PetriNetUnfolder]: 0/551 cut-off events. [2022-07-12 10:16:45,962 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-12 10:16:45,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 551 events. 0/551 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1715 event pairs, 0 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-12 10:16:45,963 INFO L132 encePairwiseOnDemand]: 430/436 looper letters, 21 selfloop transitions, 9 changer transitions 0/364 dead transitions. [2022-07-12 10:16:45,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 364 transitions, 855 flow [2022-07-12 10:16:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3146 transitions. [2022-07-12 10:16:45,967 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8017329255861366 [2022-07-12 10:16:45,967 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3146 transitions. [2022-07-12 10:16:45,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3146 transitions. [2022-07-12 10:16:45,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:45,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3146 transitions. [2022-07-12 10:16:45,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 349.55555555555554) internal successors, (3146), 9 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,973 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 436.0) internal successors, (4360), 10 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,973 INFO L186 Difference]: Start difference. First operand has 380 places, 354 transitions, 773 flow. Second operand 9 states and 3146 transitions. [2022-07-12 10:16:45,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 364 transitions, 855 flow [2022-07-12 10:16:45,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 364 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:45,980 INFO L242 Difference]: Finished difference. Result has 390 places, 360 transitions, 821 flow [2022-07-12 10:16:45,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=821, PETRI_PLACES=390, PETRI_TRANSITIONS=360} [2022-07-12 10:16:45,981 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 1 predicate places. [2022-07-12 10:16:45,981 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 360 transitions, 821 flow [2022-07-12 10:16:45,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 348.3) internal successors, (3483), 10 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:45,981 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:45,982 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] [2022-07-12 10:16:46,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:46,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-12 10:16:46,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash 126719509, now seen corresponding path program 1 times [2022-07-12 10:16:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:46,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863817116] [2022-07-12 10:16:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:46,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:46,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863817116] [2022-07-12 10:16:46,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863817116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:46,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354188292] [2022-07-12 10:16:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:46,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:46,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:46,265 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:46,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 10:16:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:46,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:46,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354188292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:46,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:46,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:46,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944682153] [2022-07-12 10:16:46,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:46,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:46,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:46,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:46,579 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-12 10:16:46,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 360 transitions, 821 flow. Second operand has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:46,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-12 10:16:46,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:46,868 INFO L129 PetriNetUnfolder]: 0/499 cut-off events. [2022-07-12 10:16:46,868 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-07-12 10:16:46,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 499 events. 0/499 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1374 event pairs, 0 based on Foata normal form. 4/503 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:46,869 INFO L132 encePairwiseOnDemand]: 430/436 looper letters, 29 selfloop transitions, 21 changer transitions 0/384 dead transitions. [2022-07-12 10:16:46,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 384 transitions, 1029 flow [2022-07-12 10:16:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7320 transitions. [2022-07-12 10:16:46,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.799475753604194 [2022-07-12 10:16:46,874 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7320 transitions. [2022-07-12 10:16:46,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7320 transitions. [2022-07-12 10:16:46,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:46,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7320 transitions. [2022-07-12 10:16:46,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 348.57142857142856) internal successors, (7320), 21 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,895 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 436.0) internal successors, (9592), 22 states have internal predecessors, (9592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,895 INFO L186 Difference]: Start difference. First operand has 390 places, 360 transitions, 821 flow. Second operand 21 states and 7320 transitions. [2022-07-12 10:16:46,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 384 transitions, 1029 flow [2022-07-12 10:16:46,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 384 transitions, 1015 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:46,904 INFO L242 Difference]: Finished difference. Result has 414 places, 373 transitions, 945 flow [2022-07-12 10:16:46,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=945, PETRI_PLACES=414, PETRI_TRANSITIONS=373} [2022-07-12 10:16:46,906 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 25 predicate places. [2022-07-12 10:16:46,907 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 373 transitions, 945 flow [2022-07-12 10:16:46,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 348.6111111111111) internal successors, (6275), 18 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:46,908 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:46,908 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:46,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:47,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 10:16:47,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -256688757, now seen corresponding path program 1 times [2022-07-12 10:16:47,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:47,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751162700] [2022-07-12 10:16:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:47,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:47,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751162700] [2022-07-12 10:16:47,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751162700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563096425] [2022-07-12 10:16:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:47,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:47,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:47,285 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:47,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 10:16:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:47,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:47,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563096425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:47,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:47,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:47,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534845234] [2022-07-12 10:16:47,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:47,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:47,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:47,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:47,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:47,803 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 436 [2022-07-12 10:16:47,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 373 transitions, 945 flow. Second operand has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:47,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:47,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 436 [2022-07-12 10:16:47,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:48,254 INFO L129 PetriNetUnfolder]: 0/434 cut-off events. [2022-07-12 10:16:48,254 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-12 10:16:48,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:16:48,255 INFO L132 encePairwiseOnDemand]: 431/436 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-07-12 10:16:48,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-07-12 10:16:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:16:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:16:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12531 transitions. [2022-07-12 10:16:48,263 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7983562691131498 [2022-07-12 10:16:48,264 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12531 transitions. [2022-07-12 10:16:48,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12531 transitions. [2022-07-12 10:16:48,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:48,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12531 transitions. [2022-07-12 10:16:48,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 348.0833333333333) internal successors, (12531), 36 states have internal predecessors, (12531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,291 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 436.0) internal successors, (16132), 37 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,291 INFO L186 Difference]: Start difference. First operand has 414 places, 373 transitions, 945 flow. Second operand 36 states and 12531 transitions. [2022-07-12 10:16:48,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-07-12 10:16:48,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:48,301 INFO L242 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-07-12 10:16:48,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-07-12 10:16:48,302 INFO L279 CegarLoopForPetriNet]: 389 programPoint places, 34 predicate places. [2022-07-12 10:16:48,302 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-07-12 10:16:48,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 348.79411764705884) internal successors, (11859), 34 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:48,304 INFO L200 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:48,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:48,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:48,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1101802981, now seen corresponding path program 1 times [2022-07-12 10:16:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:48,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063075965] [2022-07-12 10:16:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:48,553 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:48,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:48,592 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:48,593 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:48,593 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-12 10:16:48,593 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:16:48,594 WARN L231 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:48,594 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-07-12 10:16:48,624 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:48,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 418 places, 469 transitions, 1130 flow [2022-07-12 10:16:48,809 INFO L129 PetriNetUnfolder]: 124/932 cut-off events. [2022-07-12 10:16:48,809 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-12 10:16:48,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 932 events. 124/932 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3462 event pairs, 0 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 936. Up to 26 conditions per place. [2022-07-12 10:16:48,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 469 transitions, 1130 flow [2022-07-12 10:16:48,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 469 transitions, 1130 flow [2022-07-12 10:16:48,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:48,848 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:48,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:48,853 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-12 10:16:48,853 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:48,853 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:48,853 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] [2022-07-12 10:16:48,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:48,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1247865991, now seen corresponding path program 1 times [2022-07-12 10:16:48,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:48,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678425576] [2022-07-12 10:16:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:48,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:48,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678425576] [2022-07-12 10:16:48,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678425576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:48,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:48,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727404654] [2022-07-12 10:16:48,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:48,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:48,879 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 373 out of 469 [2022-07-12 10:16:48,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 469 transitions, 1130 flow. Second operand has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:48,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:48,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 373 of 469 [2022-07-12 10:16:48,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:49,097 INFO L129 PetriNetUnfolder]: 0/770 cut-off events. [2022-07-12 10:16:49,098 INFO L130 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-07-12 10:16:49,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 770 events. 0/770 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3037 event pairs, 0 based on Foata normal form. 2389/3135 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-07-12 10:16:49,099 INFO L132 encePairwiseOnDemand]: 390/469 looper letters, 21 selfloop transitions, 2 changer transitions 12/396 dead transitions. [2022-07-12 10:16:49,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 396 transitions, 1030 flow [2022-07-12 10:16:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1226 transitions. [2022-07-12 10:16:49,101 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8713574982231699 [2022-07-12 10:16:49,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1226 transitions. [2022-07-12 10:16:49,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1226 transitions. [2022-07-12 10:16:49,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:49,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1226 transitions. [2022-07-12 10:16:49,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.6666666666667) internal successors, (1226), 3 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,105 INFO L186 Difference]: Start difference. First operand has 418 places, 469 transitions, 1130 flow. Second operand 3 states and 1226 transitions. [2022-07-12 10:16:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 396 transitions, 1030 flow [2022-07-12 10:16:49,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 396 transitions, 898 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:49,145 INFO L242 Difference]: Finished difference. Result has 420 places, 381 transitions, 832 flow [2022-07-12 10:16:49,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=832, PETRI_PLACES=420, PETRI_TRANSITIONS=381} [2022-07-12 10:16:49,146 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 2 predicate places. [2022-07-12 10:16:49,146 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 381 transitions, 832 flow [2022-07-12 10:16:49,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.0) internal successors, (1122), 3 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:49,146 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] [2022-07-12 10:16:49,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-12 10:16:49,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:49,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:49,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1954451712, now seen corresponding path program 1 times [2022-07-12 10:16:49,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:49,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902228400] [2022-07-12 10:16:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:49,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902228400] [2022-07-12 10:16:49,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902228400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370300326] [2022-07-12 10:16:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:49,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:49,183 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:49,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 10:16:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:49,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:49,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:49,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:49,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370300326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:49,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:49,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:49,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171566938] [2022-07-12 10:16:49,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:49,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:49,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:49,436 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-12 10:16:49,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 381 transitions, 832 flow. Second operand has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:49,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-12 10:16:49,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:49,685 INFO L129 PetriNetUnfolder]: 0/600 cut-off events. [2022-07-12 10:16:49,685 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-07-12 10:16:49,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 600 events. 0/600 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1901 event pairs, 0 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-12 10:16:49,687 INFO L132 encePairwiseOnDemand]: 463/469 looper letters, 22 selfloop transitions, 9 changer transitions 0/391 dead transitions. [2022-07-12 10:16:49,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 391 transitions, 916 flow [2022-07-12 10:16:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3381 transitions. [2022-07-12 10:16:49,690 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8009950248756219 [2022-07-12 10:16:49,691 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3381 transitions. [2022-07-12 10:16:49,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3381 transitions. [2022-07-12 10:16:49,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:49,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3381 transitions. [2022-07-12 10:16:49,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 375.6666666666667) internal successors, (3381), 9 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,698 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,698 INFO L186 Difference]: Start difference. First operand has 420 places, 381 transitions, 832 flow. Second operand 9 states and 3381 transitions. [2022-07-12 10:16:49,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 391 transitions, 916 flow [2022-07-12 10:16:49,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 391 transitions, 914 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:49,707 INFO L242 Difference]: Finished difference. Result has 418 places, 387 transitions, 880 flow [2022-07-12 10:16:49,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=418, PETRI_TRANSITIONS=387} [2022-07-12 10:16:49,709 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 0 predicate places. [2022-07-12 10:16:49,709 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 387 transitions, 880 flow [2022-07-12 10:16:49,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 374.3) internal successors, (3743), 10 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:49,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:49,710 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] [2022-07-12 10:16:49,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 10:16:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:49,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1044128309, now seen corresponding path program 1 times [2022-07-12 10:16:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438014105] [2022-07-12 10:16:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:49,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:49,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438014105] [2022-07-12 10:16:49,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438014105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:49,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330319614] [2022-07-12 10:16:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:49,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:49,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:49,977 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:49,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 10:16:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:50,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:50,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330319614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:50,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:50,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:50,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587551686] [2022-07-12 10:16:50,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:50,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:50,285 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-12 10:16:50,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 387 transitions, 880 flow. Second operand has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:50,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-12 10:16:50,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:50,602 INFO L129 PetriNetUnfolder]: 0/548 cut-off events. [2022-07-12 10:16:50,602 INFO L130 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-07-12 10:16:50,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 548 events. 0/548 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1557 event pairs, 0 based on Foata normal form. 4/552 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:16:50,603 INFO L132 encePairwiseOnDemand]: 463/469 looper letters, 30 selfloop transitions, 21 changer transitions 0/411 dead transitions. [2022-07-12 10:16:50,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 411 transitions, 1090 flow [2022-07-12 10:16:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7867 transitions. [2022-07-12 10:16:50,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987612955630014 [2022-07-12 10:16:50,610 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7867 transitions. [2022-07-12 10:16:50,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7867 transitions. [2022-07-12 10:16:50,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:50,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7867 transitions. [2022-07-12 10:16:50,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 374.6190476190476) internal successors, (7867), 21 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,627 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,627 INFO L186 Difference]: Start difference. First operand has 418 places, 387 transitions, 880 flow. Second operand 21 states and 7867 transitions. [2022-07-12 10:16:50,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 411 transitions, 1090 flow [2022-07-12 10:16:50,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 411 transitions, 1076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:50,636 INFO L242 Difference]: Finished difference. Result has 442 places, 400 transitions, 1004 flow [2022-07-12 10:16:50,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1004, PETRI_PLACES=442, PETRI_TRANSITIONS=400} [2022-07-12 10:16:50,637 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 24 predicate places. [2022-07-12 10:16:50,637 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 400 transitions, 1004 flow [2022-07-12 10:16:50,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 374.6111111111111) internal successors, (6743), 18 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:50,638 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:50,639 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:50,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:50,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:50,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1480392363, now seen corresponding path program 1 times [2022-07-12 10:16:50,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157175026] [2022-07-12 10:16:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157175026] [2022-07-12 10:16:50,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157175026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589357366] [2022-07-12 10:16:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:50,982 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:50,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 10:16:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:51,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589357366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:51,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:51,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:51,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052552565] [2022-07-12 10:16:51,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:51,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:51,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:51,551 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 469 [2022-07-12 10:16:51,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 400 transitions, 1004 flow. Second operand has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:51,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:51,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 469 [2022-07-12 10:16:51,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:52,082 INFO L129 PetriNetUnfolder]: 0/470 cut-off events. [2022-07-12 10:16:52,082 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-07-12 10:16:52,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-07-12 10:16:52,083 INFO L132 encePairwiseOnDemand]: 464/469 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-07-12 10:16:52,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 424 transitions, 1332 flow [2022-07-12 10:16:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-12 10:16:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-12 10:16:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14590 transitions. [2022-07-12 10:16:52,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7976600513913946 [2022-07-12 10:16:52,090 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14590 transitions. [2022-07-12 10:16:52,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14590 transitions. [2022-07-12 10:16:52,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:52,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14590 transitions. [2022-07-12 10:16:52,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 374.1025641025641) internal successors, (14590), 39 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,119 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 469.0) internal successors, (18760), 40 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,119 INFO L186 Difference]: Start difference. First operand has 442 places, 400 transitions, 1004 flow. Second operand 39 states and 14590 transitions. [2022-07-12 10:16:52,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 424 transitions, 1332 flow [2022-07-12 10:16:52,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:52,129 INFO L242 Difference]: Finished difference. Result has 454 places, 402 transitions, 1083 flow [2022-07-12 10:16:52,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=454, PETRI_TRANSITIONS=402} [2022-07-12 10:16:52,131 INFO L279 CegarLoopForPetriNet]: 418 programPoint places, 36 predicate places. [2022-07-12 10:16:52,131 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 402 transitions, 1083 flow [2022-07-12 10:16:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 374.79411764705884) internal successors, (12743), 34 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,132 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,133 INFO L200 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:52,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-12 10:16:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-12 10:16:52,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 176240361, now seen corresponding path program 1 times [2022-07-12 10:16:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809739242] [2022-07-12 10:16:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:52,359 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:52,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:52,427 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:52,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:52,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-12 10:16:52,428 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:52,428 WARN L231 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:52,429 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-07-12 10:16:52,458 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:52,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 447 places, 502 transitions, 1225 flow [2022-07-12 10:16:52,678 INFO L129 PetriNetUnfolder]: 134/1004 cut-off events. [2022-07-12 10:16:52,678 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-12 10:16:52,721 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 1004 events. 134/1004 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3710 event pairs, 0 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 1021. Up to 28 conditions per place. [2022-07-12 10:16:52,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 502 transitions, 1225 flow [2022-07-12 10:16:52,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 502 transitions, 1225 flow [2022-07-12 10:16:52,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:52,742 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:52,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:52,747 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-12 10:16:52,747 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:52,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:52,747 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] [2022-07-12 10:16:52,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash -417816633, now seen corresponding path program 1 times [2022-07-12 10:16:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:52,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854006647] [2022-07-12 10:16:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:52,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:52,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854006647] [2022-07-12 10:16:52,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854006647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:52,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:52,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557134303] [2022-07-12 10:16:52,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:52,766 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 502 [2022-07-12 10:16:52,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 502 transitions, 1225 flow. Second operand has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:52,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:52,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 502 [2022-07-12 10:16:52,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:53,062 INFO L129 PetriNetUnfolder]: 0/831 cut-off events. [2022-07-12 10:16:53,063 INFO L130 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-07-12 10:16:53,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 831 events. 0/831 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3298 event pairs, 0 based on Foata normal form. 2820/3625 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-07-12 10:16:53,064 INFO L132 encePairwiseOnDemand]: 417/502 looper letters, 22 selfloop transitions, 2 changer transitions 12/423 dead transitions. [2022-07-12 10:16:53,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 423 transitions, 1115 flow [2022-07-12 10:16:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1311 transitions. [2022-07-12 10:16:53,067 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8705179282868526 [2022-07-12 10:16:53,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1311 transitions. [2022-07-12 10:16:53,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1311 transitions. [2022-07-12 10:16:53,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:53,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1311 transitions. [2022-07-12 10:16:53,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,069 INFO L186 Difference]: Start difference. First operand has 447 places, 502 transitions, 1225 flow. Second operand 3 states and 1311 transitions. [2022-07-12 10:16:53,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 423 transitions, 1115 flow [2022-07-12 10:16:53,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 423 transitions, 959 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:53,076 INFO L242 Difference]: Finished difference. Result has 449 places, 408 transitions, 891 flow [2022-07-12 10:16:53,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=891, PETRI_PLACES=449, PETRI_TRANSITIONS=408} [2022-07-12 10:16:53,077 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 2 predicate places. [2022-07-12 10:16:53,077 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 408 transitions, 891 flow [2022-07-12 10:16:53,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:53,078 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] [2022-07-12 10:16:53,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-12 10:16:53,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1901634592, now seen corresponding path program 1 times [2022-07-12 10:16:53,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:53,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597842948] [2022-07-12 10:16:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597842948] [2022-07-12 10:16:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597842948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885885650] [2022-07-12 10:16:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:53,108 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:53,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 10:16:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885885650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:53,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:53,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214537105] [2022-07-12 10:16:53,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:53,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:53,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-12 10:16:53,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 408 transitions, 891 flow. Second operand has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:53,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-12 10:16:53,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:53,638 INFO L129 PetriNetUnfolder]: 0/649 cut-off events. [2022-07-12 10:16:53,638 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:16:53,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 649 events. 0/649 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2085 event pairs, 0 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-12 10:16:53,641 INFO L132 encePairwiseOnDemand]: 496/502 looper letters, 23 selfloop transitions, 9 changer transitions 0/418 dead transitions. [2022-07-12 10:16:53,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 418 transitions, 977 flow [2022-07-12 10:16:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3616 transitions. [2022-07-12 10:16:53,644 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8003541389995573 [2022-07-12 10:16:53,644 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3616 transitions. [2022-07-12 10:16:53,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3616 transitions. [2022-07-12 10:16:53,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:53,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3616 transitions. [2022-07-12 10:16:53,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 401.77777777777777) internal successors, (3616), 9 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,651 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 502.0) internal successors, (5020), 10 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,652 INFO L186 Difference]: Start difference. First operand has 449 places, 408 transitions, 891 flow. Second operand 9 states and 3616 transitions. [2022-07-12 10:16:53,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 418 transitions, 977 flow [2022-07-12 10:16:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 418 transitions, 975 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:53,661 INFO L242 Difference]: Finished difference. Result has 447 places, 414 transitions, 939 flow [2022-07-12 10:16:53,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=939, PETRI_PLACES=447, PETRI_TRANSITIONS=414} [2022-07-12 10:16:53,663 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 0 predicate places. [2022-07-12 10:16:53,663 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 414 transitions, 939 flow [2022-07-12 10:16:53,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 400.3) internal successors, (4003), 10 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:53,664 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:53,664 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] [2022-07-12 10:16:53,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:53,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-12 10:16:53,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash -171060459, now seen corresponding path program 1 times [2022-07-12 10:16:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:53,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422592533] [2022-07-12 10:16:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:53,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:53,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422592533] [2022-07-12 10:16:53,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422592533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:53,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357883154] [2022-07-12 10:16:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:53,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:53,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:53,943 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:53,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 10:16:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:54,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357883154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:54,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:54,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:54,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626357695] [2022-07-12 10:16:54,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:54,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:54,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:54,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:54,265 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-12 10:16:54,268 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 414 transitions, 939 flow. Second operand has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,268 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:54,268 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-12 10:16:54,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:54,613 INFO L129 PetriNetUnfolder]: 0/597 cut-off events. [2022-07-12 10:16:54,613 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-12 10:16:54,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 597 events. 0/597 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1739 event pairs, 0 based on Foata normal form. 4/601 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:16:54,615 INFO L132 encePairwiseOnDemand]: 496/502 looper letters, 31 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2022-07-12 10:16:54,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 438 transitions, 1151 flow [2022-07-12 10:16:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8414 transitions. [2022-07-12 10:16:54,621 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798140770252324 [2022-07-12 10:16:54,621 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8414 transitions. [2022-07-12 10:16:54,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8414 transitions. [2022-07-12 10:16:54,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:54,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8414 transitions. [2022-07-12 10:16:54,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 400.6666666666667) internal successors, (8414), 21 states have internal predecessors, (8414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,636 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 502.0) internal successors, (11044), 22 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,636 INFO L186 Difference]: Start difference. First operand has 447 places, 414 transitions, 939 flow. Second operand 21 states and 8414 transitions. [2022-07-12 10:16:54,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 438 transitions, 1151 flow [2022-07-12 10:16:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 1137 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:54,643 INFO L242 Difference]: Finished difference. Result has 471 places, 427 transitions, 1063 flow [2022-07-12 10:16:54,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1063, PETRI_PLACES=471, PETRI_TRANSITIONS=427} [2022-07-12 10:16:54,644 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 24 predicate places. [2022-07-12 10:16:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 427 transitions, 1063 flow [2022-07-12 10:16:54,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 400.6111111111111) internal successors, (7211), 18 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:54,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:54,645 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:54,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-12 10:16:54,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-12 10:16:54,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 767133451, now seen corresponding path program 1 times [2022-07-12 10:16:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:54,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591304381] [2022-07-12 10:16:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:54,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591304381] [2022-07-12 10:16:55,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591304381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224200766] [2022-07-12 10:16:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:55,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:55,007 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:55,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 10:16:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:55,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224200766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:55,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:55,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:16:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131589349] [2022-07-12 10:16:55,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:16:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:16:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:16:55,606 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 398 out of 502 [2022-07-12 10:16:55,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 427 transitions, 1063 flow. Second operand has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:55,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:55,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 398 of 502 [2022-07-12 10:16:55,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:56,179 INFO L129 PetriNetUnfolder]: 0/506 cut-off events. [2022-07-12 10:16:56,179 INFO L130 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-07-12 10:16:56,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-07-12 10:16:56,180 INFO L132 encePairwiseOnDemand]: 497/502 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-07-12 10:16:56,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 456 transitions, 1437 flow [2022-07-12 10:16:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 10:16:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-12 10:16:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16805 transitions. [2022-07-12 10:16:56,188 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7970498956554734 [2022-07-12 10:16:56,188 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16805 transitions. [2022-07-12 10:16:56,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16805 transitions. [2022-07-12 10:16:56,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:56,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16805 transitions. [2022-07-12 10:16:56,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 400.1190476190476) internal successors, (16805), 42 states have internal predecessors, (16805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,216 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,216 INFO L186 Difference]: Start difference. First operand has 471 places, 427 transitions, 1063 flow. Second operand 42 states and 16805 transitions. [2022-07-12 10:16:56,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 456 transitions, 1437 flow [2022-07-12 10:16:56,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-07-12 10:16:56,226 INFO L242 Difference]: Finished difference. Result has 486 places, 432 transitions, 1166 flow [2022-07-12 10:16:56,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=486, PETRI_TRANSITIONS=432} [2022-07-12 10:16:56,227 INFO L279 CegarLoopForPetriNet]: 447 programPoint places, 39 predicate places. [2022-07-12 10:16:56,227 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 432 transitions, 1166 flow [2022-07-12 10:16:56,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 400.79411764705884) internal successors, (13627), 34 states have internal predecessors, (13627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,229 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:56,230 INFO L200 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:56,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:56,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:56,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1834102098, now seen corresponding path program 1 times [2022-07-12 10:16:56,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:56,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248060947] [2022-07-12 10:16:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:56,478 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:16:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:16:56,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:16:56,539 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:16:56,539 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:16:56,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:16:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-07-12 10:16:56,540 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:16:56,540 WARN L231 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:16:56,540 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-07-12 10:16:56,582 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:16:56,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 476 places, 535 transitions, 1322 flow [2022-07-12 10:16:56,833 INFO L129 PetriNetUnfolder]: 144/1076 cut-off events. [2022-07-12 10:16:56,834 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-12 10:16:56,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 1076 events. 144/1076 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4007 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 1107. Up to 30 conditions per place. [2022-07-12 10:16:56,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 476 places, 535 transitions, 1322 flow [2022-07-12 10:16:56,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 476 places, 535 transitions, 1322 flow [2022-07-12 10:16:56,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:16:56,908 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:16:56,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:16:56,913 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-12 10:16:56,913 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:16:56,913 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:56,913 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] [2022-07-12 10:16:56,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -51559578, now seen corresponding path program 1 times [2022-07-12 10:16:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:56,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408082230] [2022-07-12 10:16:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:56,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:56,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:56,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408082230] [2022-07-12 10:16:56,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408082230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:56,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:56,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:16:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679689660] [2022-07-12 10:16:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:56,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:16:56,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:16:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:16:56,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 535 [2022-07-12 10:16:56,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 535 transitions, 1322 flow. Second operand has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:56,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:56,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 535 [2022-07-12 10:16:56,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:57,134 INFO L129 PetriNetUnfolder]: 0/917 cut-off events. [2022-07-12 10:16:57,135 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-12 10:16:57,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 917 events. 0/917 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3663 event pairs, 0 based on Foata normal form. 614/1501 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-12 10:16:57,136 INFO L132 encePairwiseOnDemand]: 447/535 looper letters, 14 selfloop transitions, 0 changer transitions 12/446 dead transitions. [2022-07-12 10:16:57,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 446 transitions, 1172 flow [2022-07-12 10:16:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:16:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:16:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 966 transitions. [2022-07-12 10:16:57,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.902803738317757 [2022-07-12 10:16:57,138 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 966 transitions. [2022-07-12 10:16:57,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 966 transitions. [2022-07-12 10:16:57,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:57,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 966 transitions. [2022-07-12 10:16:57,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 483.0) internal successors, (966), 2 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,139 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,139 INFO L186 Difference]: Start difference. First operand has 476 places, 535 transitions, 1322 flow. Second operand 2 states and 966 transitions. [2022-07-12 10:16:57,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 446 transitions, 1172 flow [2022-07-12 10:16:57,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 446 transitions, 990 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:57,146 INFO L242 Difference]: Finished difference. Result has 476 places, 434 transitions, 938 flow [2022-07-12 10:16:57,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=938, PETRI_PLACES=476, PETRI_TRANSITIONS=434} [2022-07-12 10:16:57,147 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 0 predicate places. [2022-07-12 10:16:57,147 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 434 transitions, 938 flow [2022-07-12 10:16:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 432.5) internal successors, (865), 2 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,148 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:57,148 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] [2022-07-12 10:16:57,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-07-12 10:16:57,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash -344962585, now seen corresponding path program 1 times [2022-07-12 10:16:57,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:57,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169944195] [2022-07-12 10:16:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169944195] [2022-07-12 10:16:57,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169944195] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:16:57,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:16:57,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:16:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500983025] [2022-07-12 10:16:57,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:16:57,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:16:57,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:57,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:16:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:16:57,170 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 425 out of 535 [2022-07-12 10:16:57,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 434 transitions, 938 flow. Second operand has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:57,171 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 425 of 535 [2022-07-12 10:16:57,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:57,378 INFO L129 PetriNetUnfolder]: 0/724 cut-off events. [2022-07-12 10:16:57,379 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-12 10:16:57,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 724 events. 0/724 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2417 event pairs, 0 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-07-12 10:16:57,380 INFO L132 encePairwiseOnDemand]: 532/535 looper letters, 23 selfloop transitions, 2 changer transitions 0/438 dead transitions. [2022-07-12 10:16:57,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 438 transitions, 996 flow [2022-07-12 10:16:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:16:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:16:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1301 transitions. [2022-07-12 10:16:57,381 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105919003115265 [2022-07-12 10:16:57,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1301 transitions. [2022-07-12 10:16:57,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1301 transitions. [2022-07-12 10:16:57,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:57,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1301 transitions. [2022-07-12 10:16:57,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 433.6666666666667) internal successors, (1301), 3 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 535.0) internal successors, (2140), 4 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,384 INFO L186 Difference]: Start difference. First operand has 476 places, 434 transitions, 938 flow. Second operand 3 states and 1301 transitions. [2022-07-12 10:16:57,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 438 transitions, 996 flow [2022-07-12 10:16:57,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 438 transitions, 996 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:16:57,392 INFO L242 Difference]: Finished difference. Result has 467 places, 435 transitions, 950 flow [2022-07-12 10:16:57,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=950, PETRI_PLACES=467, PETRI_TRANSITIONS=435} [2022-07-12 10:16:57,393 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, -9 predicate places. [2022-07-12 10:16:57,393 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 435 transitions, 950 flow [2022-07-12 10:16:57,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.0) internal successors, (1278), 3 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:57,394 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] [2022-07-12 10:16:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-07-12 10:16:57,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash 438271168, now seen corresponding path program 1 times [2022-07-12 10:16:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:57,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701980854] [2022-07-12 10:16:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701980854] [2022-07-12 10:16:57,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701980854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490820263] [2022-07-12 10:16:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:57,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:57,428 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:57,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 10:16:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:16:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:57,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490820263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:57,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:57,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:16:57,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355010061] [2022-07-12 10:16:57,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:16:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:16:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:16:57,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-12 10:16:57,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 435 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:57,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-12 10:16:57,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:57,984 INFO L129 PetriNetUnfolder]: 0/698 cut-off events. [2022-07-12 10:16:57,984 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:16:57,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 698 events. 0/698 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2266 event pairs, 0 based on Foata normal form. 2/700 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-12 10:16:57,985 INFO L132 encePairwiseOnDemand]: 529/535 looper letters, 24 selfloop transitions, 9 changer transitions 0/445 dead transitions. [2022-07-12 10:16:57,985 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 445 transitions, 1038 flow [2022-07-12 10:16:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:16:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:16:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3851 transitions. [2022-07-12 10:16:57,988 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7997923156801662 [2022-07-12 10:16:57,988 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3851 transitions. [2022-07-12 10:16:57,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3851 transitions. [2022-07-12 10:16:57,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:57,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3851 transitions. [2022-07-12 10:16:57,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 427.8888888888889) internal successors, (3851), 9 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,993 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 535.0) internal successors, (5350), 10 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:57,994 INFO L186 Difference]: Start difference. First operand has 467 places, 435 transitions, 950 flow. Second operand 9 states and 3851 transitions. [2022-07-12 10:16:57,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 445 transitions, 1038 flow [2022-07-12 10:16:57,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 445 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:57,999 INFO L242 Difference]: Finished difference. Result has 477 places, 441 transitions, 998 flow [2022-07-12 10:16:58,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=998, PETRI_PLACES=477, PETRI_TRANSITIONS=441} [2022-07-12 10:16:58,000 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 1 predicate places. [2022-07-12 10:16:58,000 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 441 transitions, 998 flow [2022-07-12 10:16:58,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 426.3) internal successors, (4263), 10 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,001 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:58,001 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] [2022-07-12 10:16:58,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-12 10:16:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:58,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash 776120501, now seen corresponding path program 1 times [2022-07-12 10:16:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229117239] [2022-07-12 10:16:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229117239] [2022-07-12 10:16:58,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229117239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671792789] [2022-07-12 10:16:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:58,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:58,261 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:58,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 10:16:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:16:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:16:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:58,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671792789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:16:58,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:16:58,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:16:58,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908694855] [2022-07-12 10:16:58,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:16:58,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:16:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:16:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:16:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:16:58,651 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-12 10:16:58,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 441 transitions, 998 flow. Second operand has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:58,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:16:58,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-12 10:16:58,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:16:59,040 INFO L129 PetriNetUnfolder]: 0/646 cut-off events. [2022-07-12 10:16:59,041 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-07-12 10:16:59,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 646 events. 0/646 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1925 event pairs, 0 based on Foata normal form. 4/650 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:16:59,042 INFO L132 encePairwiseOnDemand]: 529/535 looper letters, 32 selfloop transitions, 21 changer transitions 0/465 dead transitions. [2022-07-12 10:16:59,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 465 transitions, 1212 flow [2022-07-12 10:16:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:16:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:16:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8961 transitions. [2022-07-12 10:16:59,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7975967957276369 [2022-07-12 10:16:59,048 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8961 transitions. [2022-07-12 10:16:59,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8961 transitions. [2022-07-12 10:16:59,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:16:59,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8961 transitions. [2022-07-12 10:16:59,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 426.7142857142857) internal successors, (8961), 21 states have internal predecessors, (8961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,065 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 535.0) internal successors, (11770), 22 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,065 INFO L186 Difference]: Start difference. First operand has 477 places, 441 transitions, 998 flow. Second operand 21 states and 8961 transitions. [2022-07-12 10:16:59,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 465 transitions, 1212 flow [2022-07-12 10:16:59,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 465 transitions, 1198 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:16:59,073 INFO L242 Difference]: Finished difference. Result has 501 places, 454 transitions, 1122 flow [2022-07-12 10:16:59,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1122, PETRI_PLACES=501, PETRI_TRANSITIONS=454} [2022-07-12 10:16:59,074 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 25 predicate places. [2022-07-12 10:16:59,074 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 454 transitions, 1122 flow [2022-07-12 10:16:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 426.6111111111111) internal successors, (7679), 18 states have internal predecessors, (7679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:16:59,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:16:59,076 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:16:59,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 10:16:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-12 10:16:59,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:16:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:16:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1898501803, now seen corresponding path program 1 times [2022-07-12 10:16:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:16:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202810897] [2022-07-12 10:16:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:16:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:59,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:16:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202810897] [2022-07-12 10:16:59,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202810897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:16:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868622867] [2022-07-12 10:16:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:16:59,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:16:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:16:59,424 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:16:59,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 10:16:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:16:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:16:59,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:16:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:16:59,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:00,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868622867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:00,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:00,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921710796] [2022-07-12 10:17:00,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:00,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:00,012 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 535 [2022-07-12 10:17:00,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 454 transitions, 1122 flow. Second operand has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:00,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 535 [2022-07-12 10:17:00,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:00,713 INFO L129 PetriNetUnfolder]: 0/542 cut-off events. [2022-07-12 10:17:00,714 INFO L130 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-07-12 10:17:00,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-07-12 10:17:00,715 INFO L132 encePairwiseOnDemand]: 530/535 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-07-12 10:17:00,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-07-12 10:17:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19176 transitions. [2022-07-12 10:17:00,735 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965109034267913 [2022-07-12 10:17:00,735 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19176 transitions. [2022-07-12 10:17:00,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19176 transitions. [2022-07-12 10:17:00,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:00,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19176 transitions. [2022-07-12 10:17:00,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 426.1333333333333) internal successors, (19176), 45 states have internal predecessors, (19176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,784 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 535.0) internal successors, (24610), 46 states have internal predecessors, (24610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,785 INFO L186 Difference]: Start difference. First operand has 501 places, 454 transitions, 1122 flow. Second operand 45 states and 19176 transitions. [2022-07-12 10:17:00,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-07-12 10:17:00,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-07-12 10:17:00,794 INFO L242 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-07-12 10:17:00,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=535, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-07-12 10:17:00,796 INFO L279 CegarLoopForPetriNet]: 476 programPoint places, 43 predicate places. [2022-07-12 10:17:00,796 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-07-12 10:17:00,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 426.79411764705884) internal successors, (14511), 34 states have internal predecessors, (14511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:00,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:00,798 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:00,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:01,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:01,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1167770068, now seen corresponding path program 1 times [2022-07-12 10:17:01,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811533557] [2022-07-12 10:17:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:01,053 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:01,114 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:01,114 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:01,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:01,115 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-07-12 10:17:01,115 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:01,116 WARN L231 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:01,116 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-07-12 10:17:01,168 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:01,172 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 505 places, 568 transitions, 1421 flow [2022-07-12 10:17:01,401 INFO L129 PetriNetUnfolder]: 154/1148 cut-off events. [2022-07-12 10:17:01,401 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-12 10:17:01,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 1148 events. 154/1148 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4321 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1196. Up to 32 conditions per place. [2022-07-12 10:17:01,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 505 places, 568 transitions, 1421 flow [2022-07-12 10:17:01,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 505 places, 568 transitions, 1421 flow [2022-07-12 10:17:01,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:01,466 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:01,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:01,469 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2022-07-12 10:17:01,470 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:01,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,470 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] [2022-07-12 10:17:01,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1466428135, now seen corresponding path program 1 times [2022-07-12 10:17:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202782243] [2022-07-12 10:17:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202782243] [2022-07-12 10:17:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202782243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:01,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:01,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57520445] [2022-07-12 10:17:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:01,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:01,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:01,487 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 451 out of 568 [2022-07-12 10:17:01,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 568 transitions, 1421 flow. Second operand has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:01,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 451 of 568 [2022-07-12 10:17:01,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:01,748 INFO L129 PetriNetUnfolder]: 0/953 cut-off events. [2022-07-12 10:17:01,748 INFO L130 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-07-12 10:17:01,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 953 events. 0/953 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 3853 event pairs, 0 based on Foata normal form. 3789/4712 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-07-12 10:17:01,749 INFO L132 encePairwiseOnDemand]: 471/568 looper letters, 24 selfloop transitions, 2 changer transitions 12/477 dead transitions. [2022-07-12 10:17:01,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 477 transitions, 1291 flow [2022-07-12 10:17:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-07-12 10:17:01,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.869131455399061 [2022-07-12 10:17:01,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-07-12 10:17:01,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-07-12 10:17:01,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:01,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-07-12 10:17:01,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 568.0) internal successors, (2272), 4 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,753 INFO L186 Difference]: Start difference. First operand has 505 places, 568 transitions, 1421 flow. Second operand 3 states and 1481 transitions. [2022-07-12 10:17:01,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 477 transitions, 1291 flow [2022-07-12 10:17:01,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 477 transitions, 1081 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:01,761 INFO L242 Difference]: Finished difference. Result has 507 places, 462 transitions, 1009 flow [2022-07-12 10:17:01,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1009, PETRI_PLACES=507, PETRI_TRANSITIONS=462} [2022-07-12 10:17:01,762 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 2 predicate places. [2022-07-12 10:17:01,762 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 462 transitions, 1009 flow [2022-07-12 10:17:01,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:01,763 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:01,763 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] [2022-07-12 10:17:01,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-07-12 10:17:01,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2049574688, now seen corresponding path program 1 times [2022-07-12 10:17:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793788509] [2022-07-12 10:17:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:01,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793788509] [2022-07-12 10:17:01,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793788509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490980759] [2022-07-12 10:17:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:01,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:01,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:01,792 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:01,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 10:17:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490980759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:02,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:02,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:02,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635765972] [2022-07-12 10:17:02,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:02,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:02,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:02,061 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-12 10:17:02,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 462 transitions, 1009 flow. Second operand has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:02,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-12 10:17:02,062 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:02,300 INFO L129 PetriNetUnfolder]: 0/747 cut-off events. [2022-07-12 10:17:02,300 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-12 10:17:02,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 747 events. 0/747 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2447 event pairs, 0 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-12 10:17:02,301 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 25 selfloop transitions, 9 changer transitions 0/472 dead transitions. [2022-07-12 10:17:02,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 472 transitions, 1099 flow [2022-07-12 10:17:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4086 transitions. [2022-07-12 10:17:02,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7992957746478874 [2022-07-12 10:17:02,304 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4086 transitions. [2022-07-12 10:17:02,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4086 transitions. [2022-07-12 10:17:02,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:02,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4086 transitions. [2022-07-12 10:17:02,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 454.0) internal successors, (4086), 9 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,309 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 568.0) internal successors, (5680), 10 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,309 INFO L186 Difference]: Start difference. First operand has 507 places, 462 transitions, 1009 flow. Second operand 9 states and 4086 transitions. [2022-07-12 10:17:02,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 472 transitions, 1099 flow [2022-07-12 10:17:02,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 472 transitions, 1097 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:02,316 INFO L242 Difference]: Finished difference. Result has 505 places, 468 transitions, 1057 flow [2022-07-12 10:17:02,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1057, PETRI_PLACES=505, PETRI_TRANSITIONS=468} [2022-07-12 10:17:02,317 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 0 predicate places. [2022-07-12 10:17:02,317 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 468 transitions, 1057 flow [2022-07-12 10:17:02,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 452.3) internal successors, (4523), 10 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,318 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:02,318 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] [2022-07-12 10:17:02,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:02,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:02,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:02,543 INFO L85 PathProgramCache]: Analyzing trace with hash -409296107, now seen corresponding path program 1 times [2022-07-12 10:17:02,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:02,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564284116] [2022-07-12 10:17:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564284116] [2022-07-12 10:17:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564284116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255688334] [2022-07-12 10:17:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:02,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:02,593 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:02,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 10:17:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:02,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255688334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:02,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:02,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:02,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852056041] [2022-07-12 10:17:02,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:02,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:02,964 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-12 10:17:02,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 468 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:02,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:02,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-12 10:17:02,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:03,325 INFO L129 PetriNetUnfolder]: 0/695 cut-off events. [2022-07-12 10:17:03,325 INFO L130 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-07-12 10:17:03,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 695 events. 0/695 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2103 event pairs, 0 based on Foata normal form. 4/699 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-12 10:17:03,326 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 33 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2022-07-12 10:17:03,326 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 492 transitions, 1273 flow [2022-07-12 10:17:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9508 transitions. [2022-07-12 10:17:03,330 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7971160295103957 [2022-07-12 10:17:03,330 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9508 transitions. [2022-07-12 10:17:03,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9508 transitions. [2022-07-12 10:17:03,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:03,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9508 transitions. [2022-07-12 10:17:03,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 452.76190476190476) internal successors, (9508), 21 states have internal predecessors, (9508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,343 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 568.0) internal successors, (12496), 22 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,343 INFO L186 Difference]: Start difference. First operand has 505 places, 468 transitions, 1057 flow. Second operand 21 states and 9508 transitions. [2022-07-12 10:17:03,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 492 transitions, 1273 flow [2022-07-12 10:17:03,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:03,350 INFO L242 Difference]: Finished difference. Result has 529 places, 481 transitions, 1181 flow [2022-07-12 10:17:03,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1181, PETRI_PLACES=529, PETRI_TRANSITIONS=481} [2022-07-12 10:17:03,351 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 24 predicate places. [2022-07-12 10:17:03,351 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 481 transitions, 1181 flow [2022-07-12 10:17:03,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 452.6111111111111) internal successors, (8147), 18 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:03,352 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:03,352 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:03,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-07-12 10:17:03,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:03,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 579530123, now seen corresponding path program 1 times [2022-07-12 10:17:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:03,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129527647] [2022-07-12 10:17:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:03,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:03,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129527647] [2022-07-12 10:17:03,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129527647] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:03,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550450991] [2022-07-12 10:17:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:03,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:03,695 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:03,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 10:17:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550450991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:04,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:04,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203407102] [2022-07-12 10:17:04,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:04,226 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 568 [2022-07-12 10:17:04,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 481 transitions, 1181 flow. Second operand has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:04,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:04,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 568 [2022-07-12 10:17:04,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:04,854 INFO L129 PetriNetUnfolder]: 0/591 cut-off events. [2022-07-12 10:17:04,855 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-12 10:17:04,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 591 events. 0/591 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1423 event pairs, 0 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-07-12 10:17:04,856 INFO L132 encePairwiseOnDemand]: 562/568 looper letters, 49 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2022-07-12 10:17:04,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 532 transitions, 1685 flow [2022-07-12 10:17:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20352 transitions. [2022-07-12 10:17:04,867 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7962441314553991 [2022-07-12 10:17:04,867 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20352 transitions. [2022-07-12 10:17:04,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20352 transitions. [2022-07-12 10:17:04,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:04,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20352 transitions. [2022-07-12 10:17:04,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 452.26666666666665) internal successors, (20352), 45 states have internal predecessors, (20352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:04,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:04,901 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 568.0) internal successors, (26128), 46 states have internal predecessors, (26128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:04,901 INFO L186 Difference]: Start difference. First operand has 529 places, 481 transitions, 1181 flow. Second operand 45 states and 20352 transitions. [2022-07-12 10:17:04,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 532 transitions, 1685 flow [2022-07-12 10:17:04,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 532 transitions, 1645 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:04,909 INFO L242 Difference]: Finished difference. Result has 576 places, 506 transitions, 1459 flow [2022-07-12 10:17:04,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1459, PETRI_PLACES=576, PETRI_TRANSITIONS=506} [2022-07-12 10:17:04,910 INFO L279 CegarLoopForPetriNet]: 505 programPoint places, 71 predicate places. [2022-07-12 10:17:04,910 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 506 transitions, 1459 flow [2022-07-12 10:17:04,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 452.79411764705884) internal successors, (15395), 34 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:04,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:04,911 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:04,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-12 10:17:05,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:05,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -813914885, now seen corresponding path program 1 times [2022-07-12 10:17:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:05,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686109674] [2022-07-12 10:17:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:05,134 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:05,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:05,186 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:05,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:05,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:05,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-07-12 10:17:05,187 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:17:05,188 WARN L231 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:05,188 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-07-12 10:17:05,241 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:05,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 534 places, 601 transitions, 1522 flow [2022-07-12 10:17:05,490 INFO L129 PetriNetUnfolder]: 164/1220 cut-off events. [2022-07-12 10:17:05,490 INFO L130 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-07-12 10:17:05,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 1220 events. 164/1220 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4564 event pairs, 0 based on Foata normal form. 0/1022 useless extension candidates. Maximal degree in co-relation 1286. Up to 34 conditions per place. [2022-07-12 10:17:05,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 534 places, 601 transitions, 1522 flow [2022-07-12 10:17:05,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 534 places, 601 transitions, 1522 flow [2022-07-12 10:17:05,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:05,556 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:05,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:05,559 INFO L129 PetriNetUnfolder]: 4/92 cut-off events. [2022-07-12 10:17:05,559 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:05,560 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:05,560 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] [2022-07-12 10:17:05,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1014791238, now seen corresponding path program 1 times [2022-07-12 10:17:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:05,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203104252] [2022-07-12 10:17:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203104252] [2022-07-12 10:17:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203104252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:05,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:05,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:05,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677960175] [2022-07-12 10:17:05,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:05,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:05,573 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 601 [2022-07-12 10:17:05,573 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 601 transitions, 1522 flow. Second operand has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:05,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 601 [2022-07-12 10:17:05,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:05,826 INFO L129 PetriNetUnfolder]: 0/1039 cut-off events. [2022-07-12 10:17:05,827 INFO L130 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-07-12 10:17:05,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1241 conditions, 1039 events. 0/1039 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4284 event pairs, 0 based on Foata normal form. 796/1801 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-07-12 10:17:05,829 INFO L132 encePairwiseOnDemand]: 501/601 looper letters, 16 selfloop transitions, 0 changer transitions 12/500 dead transitions. [2022-07-12 10:17:05,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 500 transitions, 1352 flow [2022-07-12 10:17:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1084 transitions. [2022-07-12 10:17:05,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9018302828618968 [2022-07-12 10:17:05,830 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1084 transitions. [2022-07-12 10:17:05,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1084 transitions. [2022-07-12 10:17:05,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:05,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1084 transitions. [2022-07-12 10:17:05,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 542.0) internal successors, (1084), 2 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,832 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 601.0) internal successors, (1803), 3 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,832 INFO L186 Difference]: Start difference. First operand has 534 places, 601 transitions, 1522 flow. Second operand 2 states and 1084 transitions. [2022-07-12 10:17:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 500 transitions, 1352 flow [2022-07-12 10:17:05,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 500 transitions, 1112 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:05,839 INFO L242 Difference]: Finished difference. Result has 534 places, 488 transitions, 1056 flow [2022-07-12 10:17:05,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1056, PETRI_PLACES=534, PETRI_TRANSITIONS=488} [2022-07-12 10:17:05,840 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 0 predicate places. [2022-07-12 10:17:05,840 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 488 transitions, 1056 flow [2022-07-12 10:17:05,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 484.5) internal successors, (969), 2 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:05,841 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] [2022-07-12 10:17:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-07-12 10:17:05,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash 721388231, now seen corresponding path program 1 times [2022-07-12 10:17:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755371092] [2022-07-12 10:17:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:05,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:05,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755371092] [2022-07-12 10:17:05,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755371092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:05,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:05,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:05,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697118347] [2022-07-12 10:17:05,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:05,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:05,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:05,864 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 477 out of 601 [2022-07-12 10:17:05,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 488 transitions, 1056 flow. Second operand has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:05,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:05,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 477 of 601 [2022-07-12 10:17:05,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,076 INFO L129 PetriNetUnfolder]: 0/822 cut-off events. [2022-07-12 10:17:06,076 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-12 10:17:06,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 822 events. 0/822 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2782 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-07-12 10:17:06,078 INFO L132 encePairwiseOnDemand]: 598/601 looper letters, 25 selfloop transitions, 2 changer transitions 0/492 dead transitions. [2022-07-12 10:17:06,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 492 transitions, 1118 flow [2022-07-12 10:17:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1459 transitions. [2022-07-12 10:17:06,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8092068774265113 [2022-07-12 10:17:06,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1459 transitions. [2022-07-12 10:17:06,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1459 transitions. [2022-07-12 10:17:06,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1459 transitions. [2022-07-12 10:17:06,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 486.3333333333333) internal successors, (1459), 3 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,081 INFO L186 Difference]: Start difference. First operand has 534 places, 488 transitions, 1056 flow. Second operand 3 states and 1459 transitions. [2022-07-12 10:17:06,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 492 transitions, 1118 flow [2022-07-12 10:17:06,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 492 transitions, 1118 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:06,087 INFO L242 Difference]: Finished difference. Result has 525 places, 489 transitions, 1068 flow [2022-07-12 10:17:06,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1068, PETRI_PLACES=525, PETRI_TRANSITIONS=489} [2022-07-12 10:17:06,087 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, -9 predicate places. [2022-07-12 10:17:06,088 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 489 transitions, 1068 flow [2022-07-12 10:17:06,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 478.0) internal successors, (1434), 3 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,088 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] [2022-07-12 10:17:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-07-12 10:17:06,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1266935680, now seen corresponding path program 1 times [2022-07-12 10:17:06,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610394725] [2022-07-12 10:17:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610394725] [2022-07-12 10:17:06,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610394725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:06,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346886973] [2022-07-12 10:17:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:06,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:06,114 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:06,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 10:17:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346886973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:06,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:06,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797161996] [2022-07-12 10:17:06,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:06,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:06,415 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-12 10:17:06,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 489 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:06,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-12 10:17:06,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:06,684 INFO L129 PetriNetUnfolder]: 0/796 cut-off events. [2022-07-12 10:17:06,685 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-07-12 10:17:06,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 796 events. 0/796 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2638 event pairs, 0 based on Foata normal form. 2/798 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-12 10:17:06,686 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 26 selfloop transitions, 9 changer transitions 0/499 dead transitions. [2022-07-12 10:17:06,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 499 transitions, 1160 flow [2022-07-12 10:17:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4321 transitions. [2022-07-12 10:17:06,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.798853762248105 [2022-07-12 10:17:06,688 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4321 transitions. [2022-07-12 10:17:06,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4321 transitions. [2022-07-12 10:17:06,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:06,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4321 transitions. [2022-07-12 10:17:06,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 480.1111111111111) internal successors, (4321), 9 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,694 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 601.0) internal successors, (6010), 10 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,694 INFO L186 Difference]: Start difference. First operand has 525 places, 489 transitions, 1068 flow. Second operand 9 states and 4321 transitions. [2022-07-12 10:17:06,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 499 transitions, 1160 flow [2022-07-12 10:17:06,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 499 transitions, 1158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:06,700 INFO L242 Difference]: Finished difference. Result has 535 places, 495 transitions, 1116 flow [2022-07-12 10:17:06,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1116, PETRI_PLACES=535, PETRI_TRANSITIONS=495} [2022-07-12 10:17:06,701 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 1 predicate places. [2022-07-12 10:17:06,701 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 495 transitions, 1116 flow [2022-07-12 10:17:06,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 478.3) internal successors, (4783), 10 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:06,702 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:06,702 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] [2022-07-12 10:17:06,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:06,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-07-12 10:17:06,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:06,920 INFO L85 PathProgramCache]: Analyzing trace with hash 567657013, now seen corresponding path program 1 times [2022-07-12 10:17:06,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213093680] [2022-07-12 10:17:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:06,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213093680] [2022-07-12 10:17:06,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213093680] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:06,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133088084] [2022-07-12 10:17:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:06,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:06,966 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:06,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 10:17:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:07,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:07,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:07,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:07,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133088084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:07,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:07,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574227480] [2022-07-12 10:17:07,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:07,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:07,327 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-12 10:17:07,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 495 transitions, 1116 flow. Second operand has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:07,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-12 10:17:07,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:07,718 INFO L129 PetriNetUnfolder]: 0/744 cut-off events. [2022-07-12 10:17:07,718 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-12 10:17:07,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 744 events. 0/744 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2286 event pairs, 0 based on Foata normal form. 4/748 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-12 10:17:07,720 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 34 selfloop transitions, 21 changer transitions 0/519 dead transitions. [2022-07-12 10:17:07,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 519 transitions, 1334 flow [2022-07-12 10:17:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10055 transitions. [2022-07-12 10:17:07,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966880595832343 [2022-07-12 10:17:07,724 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10055 transitions. [2022-07-12 10:17:07,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10055 transitions. [2022-07-12 10:17:07,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:07,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10055 transitions. [2022-07-12 10:17:07,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 478.8095238095238) internal successors, (10055), 21 states have internal predecessors, (10055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,739 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 601.0) internal successors, (13222), 22 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,740 INFO L186 Difference]: Start difference. First operand has 535 places, 495 transitions, 1116 flow. Second operand 21 states and 10055 transitions. [2022-07-12 10:17:07,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 519 transitions, 1334 flow [2022-07-12 10:17:07,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 519 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:07,747 INFO L242 Difference]: Finished difference. Result has 559 places, 508 transitions, 1240 flow [2022-07-12 10:17:07,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1240, PETRI_PLACES=559, PETRI_TRANSITIONS=508} [2022-07-12 10:17:07,747 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 25 predicate places. [2022-07-12 10:17:07,748 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 508 transitions, 1240 flow [2022-07-12 10:17:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 478.6111111111111) internal successors, (8615), 18 states have internal predecessors, (8615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:07,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:07,749 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:07,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-12 10:17:07,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:07,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1105185707, now seen corresponding path program 1 times [2022-07-12 10:17:07,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:07,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422108372] [2022-07-12 10:17:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:07,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422108372] [2022-07-12 10:17:08,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422108372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414899167] [2022-07-12 10:17:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:08,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:08,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:08,071 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:08,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 10:17:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:08,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:08,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414899167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:08,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:08,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:08,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646878203] [2022-07-12 10:17:08,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:08,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:08,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:08,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:08,696 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-12 10:17:08,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 508 transitions, 1240 flow. Second operand has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:08,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:08,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-12 10:17:08,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:09,303 INFO L129 PetriNetUnfolder]: 0/640 cut-off events. [2022-07-12 10:17:09,304 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-07-12 10:17:09,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 640 events. 0/640 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1606 event pairs, 0 based on Foata normal form. 8/648 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-07-12 10:17:09,305 INFO L132 encePairwiseOnDemand]: 595/601 looper letters, 50 selfloop transitions, 45 changer transitions 0/559 dead transitions. [2022-07-12 10:17:09,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 559 transitions, 1746 flow [2022-07-12 10:17:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21523 transitions. [2022-07-12 10:17:09,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.795821778517286 [2022-07-12 10:17:09,314 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21523 transitions. [2022-07-12 10:17:09,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21523 transitions. [2022-07-12 10:17:09,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:09,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21523 transitions. [2022-07-12 10:17:09,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 478.2888888888889) internal successors, (21523), 45 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,346 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 601.0) internal successors, (27646), 46 states have internal predecessors, (27646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,346 INFO L186 Difference]: Start difference. First operand has 559 places, 508 transitions, 1240 flow. Second operand 45 states and 21523 transitions. [2022-07-12 10:17:09,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 559 transitions, 1746 flow [2022-07-12 10:17:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 559 transitions, 1706 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:09,355 INFO L242 Difference]: Finished difference. Result has 606 places, 533 transitions, 1518 flow [2022-07-12 10:17:09,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1518, PETRI_PLACES=606, PETRI_TRANSITIONS=533} [2022-07-12 10:17:09,356 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 72 predicate places. [2022-07-12 10:17:09,356 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 533 transitions, 1518 flow [2022-07-12 10:17:09,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 478.79411764705884) internal successors, (16279), 34 states have internal predecessors, (16279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:09,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:09,358 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:09,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-12 10:17:09,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-07-12 10:17:09,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2142953785, now seen corresponding path program 1 times [2022-07-12 10:17:09,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:09,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408402267] [2022-07-12 10:17:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:09,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:09,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408402267] [2022-07-12 10:17:09,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408402267] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:09,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85776459] [2022-07-12 10:17:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:09,922 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:09,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 10:17:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:10,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:10,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85776459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:11,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:11,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337891353] [2022-07-12 10:17:11,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:11,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:11,126 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 601 [2022-07-12 10:17:11,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 533 transitions, 1518 flow. Second operand has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:11,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:11,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 601 [2022-07-12 10:17:11,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:11,870 INFO L129 PetriNetUnfolder]: 0/614 cut-off events. [2022-07-12 10:17:11,870 INFO L130 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-07-12 10:17:11,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-12 10:17:11,871 INFO L132 encePairwiseOnDemand]: 596/601 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-07-12 10:17:11,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-07-12 10:17:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-12 10:17:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-12 10:17:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24378 transitions. [2022-07-12 10:17:11,884 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953410981697171 [2022-07-12 10:17:11,884 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24378 transitions. [2022-07-12 10:17:11,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24378 transitions. [2022-07-12 10:17:11,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:11,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24378 transitions. [2022-07-12 10:17:11,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 478.0) internal successors, (24378), 51 states have internal predecessors, (24378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:11,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:11,920 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 601.0) internal successors, (31252), 52 states have internal predecessors, (31252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:11,920 INFO L186 Difference]: Start difference. First operand has 606 places, 533 transitions, 1518 flow. Second operand 51 states and 24378 transitions. [2022-07-12 10:17:11,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-07-12 10:17:11,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:11,929 INFO L242 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-07-12 10:17:11,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-07-12 10:17:11,930 INFO L279 CegarLoopForPetriNet]: 534 programPoint places, 76 predicate places. [2022-07-12 10:17:11,930 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-07-12 10:17:11,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 478.8939393939394) internal successors, (31607), 66 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:11,933 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:11,934 INFO L200 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:11,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:12,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-07-12 10:17:12,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -823919421, now seen corresponding path program 1 times [2022-07-12 10:17:12,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840049318] [2022-07-12 10:17:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:12,178 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:12,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:12,233 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:12,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:12,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-07-12 10:17:12,234 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:12,234 WARN L231 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:12,234 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-07-12 10:17:12,273 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:12,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 563 places, 634 transitions, 1625 flow [2022-07-12 10:17:12,540 INFO L129 PetriNetUnfolder]: 174/1292 cut-off events. [2022-07-12 10:17:12,540 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-12 10:17:12,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1292 events. 174/1292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4858 event pairs, 0 based on Foata normal form. 0/1082 useless extension candidates. Maximal degree in co-relation 1377. Up to 36 conditions per place. [2022-07-12 10:17:12,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 563 places, 634 transitions, 1625 flow [2022-07-12 10:17:12,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 563 places, 634 transitions, 1625 flow [2022-07-12 10:17:12,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:12,613 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:12,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:12,618 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-12 10:17:12,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:12,618 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:12,618 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] [2022-07-12 10:17:12,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:12,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1714884999, now seen corresponding path program 1 times [2022-07-12 10:17:12,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:12,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597760445] [2022-07-12 10:17:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597760445] [2022-07-12 10:17:12,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597760445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:12,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:12,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268192018] [2022-07-12 10:17:12,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:12,633 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 634 [2022-07-12 10:17:12,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 634 transitions, 1625 flow. Second operand has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:12,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:12,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 634 [2022-07-12 10:17:12,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:12,937 INFO L129 PetriNetUnfolder]: 0/1075 cut-off events. [2022-07-12 10:17:12,938 INFO L130 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-07-12 10:17:12,938 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 1075 events. 0/1075 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4417 event pairs, 0 based on Foata normal form. 4903/5944 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-07-12 10:17:12,939 INFO L132 encePairwiseOnDemand]: 525/634 looper letters, 26 selfloop transitions, 2 changer transitions 12/531 dead transitions. [2022-07-12 10:17:12,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 531 transitions, 1475 flow [2022-07-12 10:17:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1651 transitions. [2022-07-12 10:17:12,941 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8680336487907466 [2022-07-12 10:17:12,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1651 transitions. [2022-07-12 10:17:12,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1651 transitions. [2022-07-12 10:17:12,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:12,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1651 transitions. [2022-07-12 10:17:12,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 550.3333333333334) internal successors, (1651), 3 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:12,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:12,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 634.0) internal successors, (2536), 4 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:12,943 INFO L186 Difference]: Start difference. First operand has 563 places, 634 transitions, 1625 flow. Second operand 3 states and 1651 transitions. [2022-07-12 10:17:12,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 531 transitions, 1475 flow [2022-07-12 10:17:12,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 531 transitions, 1203 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:12,950 INFO L242 Difference]: Finished difference. Result has 565 places, 516 transitions, 1127 flow [2022-07-12 10:17:12,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1127, PETRI_PLACES=565, PETRI_TRANSITIONS=516} [2022-07-12 10:17:12,951 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 2 predicate places. [2022-07-12 10:17:12,951 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 516 transitions, 1127 flow [2022-07-12 10:17:12,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:12,951 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:12,951 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] [2022-07-12 10:17:12,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-07-12 10:17:12,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1508779104, now seen corresponding path program 1 times [2022-07-12 10:17:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:12,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609278978] [2022-07-12 10:17:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609278978] [2022-07-12 10:17:12,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609278978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359564595] [2022-07-12 10:17:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:12,979 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:12,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 10:17:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:13,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:13,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359564595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:13,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:13,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:13,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442834934] [2022-07-12 10:17:13,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:13,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:13,292 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-12 10:17:13,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 516 transitions, 1127 flow. Second operand has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:13,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-12 10:17:13,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:13,577 INFO L129 PetriNetUnfolder]: 0/845 cut-off events. [2022-07-12 10:17:13,577 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:17:13,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 845 events. 0/845 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2812 event pairs, 0 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-12 10:17:13,579 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 27 selfloop transitions, 9 changer transitions 0/526 dead transitions. [2022-07-12 10:17:13,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 526 transitions, 1221 flow [2022-07-12 10:17:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4556 transitions. [2022-07-12 10:17:13,583 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7984577637574483 [2022-07-12 10:17:13,583 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4556 transitions. [2022-07-12 10:17:13,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4556 transitions. [2022-07-12 10:17:13,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:13,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4556 transitions. [2022-07-12 10:17:13,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 506.22222222222223) internal successors, (4556), 9 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,589 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 634.0) internal successors, (6340), 10 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,589 INFO L186 Difference]: Start difference. First operand has 565 places, 516 transitions, 1127 flow. Second operand 9 states and 4556 transitions. [2022-07-12 10:17:13,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 526 transitions, 1221 flow [2022-07-12 10:17:13,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 526 transitions, 1219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:13,595 INFO L242 Difference]: Finished difference. Result has 563 places, 522 transitions, 1175 flow [2022-07-12 10:17:13,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1175, PETRI_PLACES=563, PETRI_TRANSITIONS=522} [2022-07-12 10:17:13,596 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 0 predicate places. [2022-07-12 10:17:13,596 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 522 transitions, 1175 flow [2022-07-12 10:17:13,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 504.3) internal successors, (5043), 10 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:13,596 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:13,597 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] [2022-07-12 10:17:13,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-12 10:17:13,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:13,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash -587987435, now seen corresponding path program 1 times [2022-07-12 10:17:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299018116] [2022-07-12 10:17:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:13,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:13,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:13,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299018116] [2022-07-12 10:17:13,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299018116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:13,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520715727] [2022-07-12 10:17:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:13,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:13,848 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:13,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 10:17:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520715727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:14,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:14,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439823139] [2022-07-12 10:17:14,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:14,243 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-12 10:17:14,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 522 transitions, 1175 flow. Second operand has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:14,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-12 10:17:14,245 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:14,619 INFO L129 PetriNetUnfolder]: 0/793 cut-off events. [2022-07-12 10:17:14,619 INFO L130 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-07-12 10:17:14,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 793 events. 0/793 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2472 event pairs, 0 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-12 10:17:14,621 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 35 selfloop transitions, 21 changer transitions 0/546 dead transitions. [2022-07-12 10:17:14,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 546 transitions, 1395 flow [2022-07-12 10:17:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10602 transitions. [2022-07-12 10:17:14,626 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963046417305092 [2022-07-12 10:17:14,626 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10602 transitions. [2022-07-12 10:17:14,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10602 transitions. [2022-07-12 10:17:14,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:14,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10602 transitions. [2022-07-12 10:17:14,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 504.85714285714283) internal successors, (10602), 21 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,638 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 634.0) internal successors, (13948), 22 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,638 INFO L186 Difference]: Start difference. First operand has 563 places, 522 transitions, 1175 flow. Second operand 21 states and 10602 transitions. [2022-07-12 10:17:14,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 546 transitions, 1395 flow [2022-07-12 10:17:14,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1381 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:14,646 INFO L242 Difference]: Finished difference. Result has 587 places, 535 transitions, 1299 flow [2022-07-12 10:17:14,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1299, PETRI_PLACES=587, PETRI_TRANSITIONS=535} [2022-07-12 10:17:14,647 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 24 predicate places. [2022-07-12 10:17:14,647 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 535 transitions, 1299 flow [2022-07-12 10:17:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 504.6111111111111) internal successors, (9083), 18 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:14,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:14,649 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:14,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:14,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-07-12 10:17:14,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -819498741, now seen corresponding path program 1 times [2022-07-12 10:17:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:14,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476778633] [2022-07-12 10:17:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476778633] [2022-07-12 10:17:14,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476778633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411477915] [2022-07-12 10:17:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:14,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:14,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:14,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:14,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 10:17:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:15,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411477915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:15,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:15,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600767381] [2022-07-12 10:17:15,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:15,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:15,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-12 10:17:15,576 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 535 transitions, 1299 flow. Second operand has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:15,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:15,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-12 10:17:15,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:16,289 INFO L129 PetriNetUnfolder]: 0/689 cut-off events. [2022-07-12 10:17:16,290 INFO L130 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-07-12 10:17:16,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 689 events. 0/689 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1791 event pairs, 0 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:17:16,291 INFO L132 encePairwiseOnDemand]: 628/634 looper letters, 51 selfloop transitions, 45 changer transitions 0/586 dead transitions. [2022-07-12 10:17:16,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 586 transitions, 1807 flow [2022-07-12 10:17:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22694 transitions. [2022-07-12 10:17:16,299 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954433929197336 [2022-07-12 10:17:16,300 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22694 transitions. [2022-07-12 10:17:16,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22694 transitions. [2022-07-12 10:17:16,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:16,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22694 transitions. [2022-07-12 10:17:16,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 504.31111111111113) internal successors, (22694), 45 states have internal predecessors, (22694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,331 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 634.0) internal successors, (29164), 46 states have internal predecessors, (29164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,331 INFO L186 Difference]: Start difference. First operand has 587 places, 535 transitions, 1299 flow. Second operand 45 states and 22694 transitions. [2022-07-12 10:17:16,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 586 transitions, 1807 flow [2022-07-12 10:17:16,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 586 transitions, 1767 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:16,339 INFO L242 Difference]: Finished difference. Result has 634 places, 560 transitions, 1577 flow [2022-07-12 10:17:16,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1577, PETRI_PLACES=634, PETRI_TRANSITIONS=560} [2022-07-12 10:17:16,339 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 71 predicate places. [2022-07-12 10:17:16,340 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 560 transitions, 1577 flow [2022-07-12 10:17:16,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 504.79411764705884) internal successors, (17163), 34 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:16,341 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:16,341 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:16,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-12 10:17:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:16,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:16,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1853815001, now seen corresponding path program 1 times [2022-07-12 10:17:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:16,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466251553] [2022-07-12 10:17:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:16,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466251553] [2022-07-12 10:17:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466251553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749144414] [2022-07-12 10:17:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:16,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:16,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:16,870 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:16,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 10:17:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:17,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:18,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749144414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:18,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:18,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:18,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736221470] [2022-07-12 10:17:18,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:18,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:18,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:18,099 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 502 out of 634 [2022-07-12 10:17:18,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 560 transitions, 1577 flow. Second operand has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:18,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:18,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 502 of 634 [2022-07-12 10:17:18,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:18,963 INFO L129 PetriNetUnfolder]: 0/650 cut-off events. [2022-07-12 10:17:18,963 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-12 10:17:18,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:17:18,964 INFO L132 encePairwiseOnDemand]: 629/634 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-07-12 10:17:18,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 584 transitions, 1967 flow [2022-07-12 10:17:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-12 10:17:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-07-12 10:17:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27217 transitions. [2022-07-12 10:17:18,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7949818904077579 [2022-07-12 10:17:18,974 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27217 transitions. [2022-07-12 10:17:18,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27217 transitions. [2022-07-12 10:17:18,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:18,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27217 transitions. [2022-07-12 10:17:18,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 504.01851851851853) internal successors, (27217), 54 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:19,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:19,012 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 634.0) internal successors, (34870), 55 states have internal predecessors, (34870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:19,013 INFO L186 Difference]: Start difference. First operand has 634 places, 560 transitions, 1577 flow. Second operand 54 states and 27217 transitions. [2022-07-12 10:17:19,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 584 transitions, 1967 flow [2022-07-12 10:17:19,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:19,021 INFO L242 Difference]: Finished difference. Result has 641 places, 553 transitions, 1559 flow [2022-07-12 10:17:19,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=634, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=641, PETRI_TRANSITIONS=553} [2022-07-12 10:17:19,022 INFO L279 CegarLoopForPetriNet]: 563 programPoint places, 78 predicate places. [2022-07-12 10:17:19,022 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 553 transitions, 1559 flow [2022-07-12 10:17:19,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 504.8939393939394) internal successors, (33323), 66 states have internal predecessors, (33323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:19,025 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:19,025 INFO L200 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:19,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:19,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:19,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:19,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1613944372, now seen corresponding path program 1 times [2022-07-12 10:17:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:19,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047052697] [2022-07-12 10:17:19,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:19,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:19,252 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:19,299 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:19,300 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:19,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:19,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:19,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-07-12 10:17:19,301 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:19,301 WARN L231 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:19,301 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-07-12 10:17:19,338 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:19,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 592 places, 667 transitions, 1730 flow [2022-07-12 10:17:19,733 INFO L129 PetriNetUnfolder]: 184/1364 cut-off events. [2022-07-12 10:17:19,734 INFO L130 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-07-12 10:17:19,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1590 conditions, 1364 events. 184/1364 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5129 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1469. Up to 38 conditions per place. [2022-07-12 10:17:19,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 592 places, 667 transitions, 1730 flow [2022-07-12 10:17:19,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 592 places, 667 transitions, 1730 flow [2022-07-12 10:17:19,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:19,850 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:19,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:19,854 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-12 10:17:19,854 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:19,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:19,855 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] [2022-07-12 10:17:19,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 445354150, now seen corresponding path program 1 times [2022-07-12 10:17:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:19,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867059753] [2022-07-12 10:17:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:19,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:19,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867059753] [2022-07-12 10:17:19,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867059753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:19,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:17:19,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255445892] [2022-07-12 10:17:19,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:19,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:17:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:17:19,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:17:19,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 667 [2022-07-12 10:17:19,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 667 transitions, 1730 flow. Second operand has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:19,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:19,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 667 [2022-07-12 10:17:19,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,244 INFO L129 PetriNetUnfolder]: 0/1161 cut-off events. [2022-07-12 10:17:20,244 INFO L130 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-07-12 10:17:20,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 1161 events. 0/1161 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4832 event pairs, 0 based on Foata normal form. 1002/2125 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-12 10:17:20,245 INFO L132 encePairwiseOnDemand]: 555/667 looper letters, 18 selfloop transitions, 0 changer transitions 12/554 dead transitions. [2022-07-12 10:17:20,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 554 transitions, 1540 flow [2022-07-12 10:17:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:17:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:17:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1202 transitions. [2022-07-12 10:17:20,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9010494752623688 [2022-07-12 10:17:20,247 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1202 transitions. [2022-07-12 10:17:20,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1202 transitions. [2022-07-12 10:17:20,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1202 transitions. [2022-07-12 10:17:20,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 601.0) internal successors, (1202), 2 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,248 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 667.0) internal successors, (2001), 3 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,248 INFO L186 Difference]: Start difference. First operand has 592 places, 667 transitions, 1730 flow. Second operand 2 states and 1202 transitions. [2022-07-12 10:17:20,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 554 transitions, 1540 flow [2022-07-12 10:17:20,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 554 transitions, 1234 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:20,257 INFO L242 Difference]: Finished difference. Result has 592 places, 542 transitions, 1174 flow [2022-07-12 10:17:20,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1174, PETRI_PLACES=592, PETRI_TRANSITIONS=542} [2022-07-12 10:17:20,259 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 0 predicate places. [2022-07-12 10:17:20,259 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 542 transitions, 1174 flow [2022-07-12 10:17:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 536.5) internal successors, (1073), 2 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,259 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] [2022-07-12 10:17:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-07-12 10:17:20,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash 151951143, now seen corresponding path program 1 times [2022-07-12 10:17:20,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825048755] [2022-07-12 10:17:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825048755] [2022-07-12 10:17:20,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825048755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:20,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:20,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137328776] [2022-07-12 10:17:20,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:20,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:20,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:20,284 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 529 out of 667 [2022-07-12 10:17:20,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 542 transitions, 1174 flow. Second operand has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 529 of 667 [2022-07-12 10:17:20,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:20,571 INFO L129 PetriNetUnfolder]: 0/920 cut-off events. [2022-07-12 10:17:20,572 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-12 10:17:20,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 920 events. 0/920 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3161 event pairs, 0 based on Foata normal form. 0/902 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-07-12 10:17:20,573 INFO L132 encePairwiseOnDemand]: 664/667 looper letters, 27 selfloop transitions, 2 changer transitions 0/546 dead transitions. [2022-07-12 10:17:20,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 546 transitions, 1240 flow [2022-07-12 10:17:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1617 transitions. [2022-07-12 10:17:20,575 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.808095952023988 [2022-07-12 10:17:20,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1617 transitions. [2022-07-12 10:17:20,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1617 transitions. [2022-07-12 10:17:20,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:20,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1617 transitions. [2022-07-12 10:17:20,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 539.0) internal successors, (1617), 3 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 667.0) internal successors, (2668), 4 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,577 INFO L186 Difference]: Start difference. First operand has 592 places, 542 transitions, 1174 flow. Second operand 3 states and 1617 transitions. [2022-07-12 10:17:20,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 546 transitions, 1240 flow [2022-07-12 10:17:20,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 546 transitions, 1240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:20,583 INFO L242 Difference]: Finished difference. Result has 583 places, 543 transitions, 1186 flow [2022-07-12 10:17:20,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1186, PETRI_PLACES=583, PETRI_TRANSITIONS=543} [2022-07-12 10:17:20,584 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, -9 predicate places. [2022-07-12 10:17:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 543 transitions, 1186 flow [2022-07-12 10:17:20,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,585 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:20,585 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] [2022-07-12 10:17:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-07-12 10:17:20,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1519862336, now seen corresponding path program 1 times [2022-07-12 10:17:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:20,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528918846] [2022-07-12 10:17:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:20,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528918846] [2022-07-12 10:17:20,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528918846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:20,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49199837] [2022-07-12 10:17:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:20,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:20,614 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:20,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 10:17:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:20,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49199837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:20,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:20,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:20,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180437835] [2022-07-12 10:17:20,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:20,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:20,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:20,965 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-12 10:17:20,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 543 transitions, 1186 flow. Second operand has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:20,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:20,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-12 10:17:20,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:21,272 INFO L129 PetriNetUnfolder]: 0/894 cut-off events. [2022-07-12 10:17:21,273 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-12 10:17:21,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 894 events. 0/894 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3002 event pairs, 0 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-12 10:17:21,274 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 28 selfloop transitions, 9 changer transitions 0/553 dead transitions. [2022-07-12 10:17:21,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 553 transitions, 1282 flow [2022-07-12 10:17:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4791 transitions. [2022-07-12 10:17:21,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7981009495252374 [2022-07-12 10:17:21,277 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4791 transitions. [2022-07-12 10:17:21,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4791 transitions. [2022-07-12 10:17:21,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:21,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4791 transitions. [2022-07-12 10:17:21,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 532.3333333333334) internal successors, (4791), 9 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,283 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 667.0) internal successors, (6670), 10 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,283 INFO L186 Difference]: Start difference. First operand has 583 places, 543 transitions, 1186 flow. Second operand 9 states and 4791 transitions. [2022-07-12 10:17:21,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 553 transitions, 1282 flow [2022-07-12 10:17:21,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 553 transitions, 1280 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:21,291 INFO L242 Difference]: Finished difference. Result has 593 places, 549 transitions, 1234 flow [2022-07-12 10:17:21,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1234, PETRI_PLACES=593, PETRI_TRANSITIONS=549} [2022-07-12 10:17:21,292 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 1 predicate places. [2022-07-12 10:17:21,292 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 549 transitions, 1234 flow [2022-07-12 10:17:21,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 530.3) internal successors, (5303), 10 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:21,292 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:21,292 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] [2022-07-12 10:17:21,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-12 10:17:21,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 418737845, now seen corresponding path program 1 times [2022-07-12 10:17:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:21,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544084074] [2022-07-12 10:17:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:21,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544084074] [2022-07-12 10:17:21,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544084074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:21,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85455333] [2022-07-12 10:17:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:21,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:21,545 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:21,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 10:17:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:21,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:21,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85455333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:22,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:22,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:22,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824810103] [2022-07-12 10:17:22,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:22,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:22,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:22,018 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-12 10:17:22,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 549 transitions, 1234 flow. Second operand has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:22,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-12 10:17:22,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:22,402 INFO L129 PetriNetUnfolder]: 0/842 cut-off events. [2022-07-12 10:17:22,403 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-07-12 10:17:22,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 842 events. 0/842 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2655 event pairs, 0 based on Foata normal form. 4/846 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-12 10:17:22,404 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 36 selfloop transitions, 21 changer transitions 0/573 dead transitions. [2022-07-12 10:17:22,404 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 573 transitions, 1456 flow [2022-07-12 10:17:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11149 transitions. [2022-07-12 10:17:22,409 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959591632755051 [2022-07-12 10:17:22,409 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11149 transitions. [2022-07-12 10:17:22,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11149 transitions. [2022-07-12 10:17:22,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:22,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11149 transitions. [2022-07-12 10:17:22,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 530.9047619047619) internal successors, (11149), 21 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,424 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 667.0) internal successors, (14674), 22 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,424 INFO L186 Difference]: Start difference. First operand has 593 places, 549 transitions, 1234 flow. Second operand 21 states and 11149 transitions. [2022-07-12 10:17:22,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 573 transitions, 1456 flow [2022-07-12 10:17:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 573 transitions, 1442 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:22,433 INFO L242 Difference]: Finished difference. Result has 617 places, 562 transitions, 1358 flow [2022-07-12 10:17:22,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=617, PETRI_TRANSITIONS=562} [2022-07-12 10:17:22,434 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 25 predicate places. [2022-07-12 10:17:22,434 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 562 transitions, 1358 flow [2022-07-12 10:17:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 530.6111111111111) internal successors, (9551), 18 states have internal predecessors, (9551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:22,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:22,436 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:22,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-12 10:17:22,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -899555925, now seen corresponding path program 1 times [2022-07-12 10:17:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986278684] [2022-07-12 10:17:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:22,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986278684] [2022-07-12 10:17:22,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986278684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:22,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322281678] [2022-07-12 10:17:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:22,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:22,769 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:22,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-12 10:17:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:23,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322281678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:23,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:23,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:23,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851945283] [2022-07-12 10:17:23,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:23,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:23,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-12 10:17:23,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 562 transitions, 1358 flow. Second operand has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:23,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:23,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-12 10:17:23,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:24,031 INFO L129 PetriNetUnfolder]: 0/738 cut-off events. [2022-07-12 10:17:24,031 INFO L130 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-07-12 10:17:24,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 738 events. 0/738 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1975 event pairs, 0 based on Foata normal form. 8/746 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-07-12 10:17:24,033 INFO L132 encePairwiseOnDemand]: 661/667 looper letters, 52 selfloop transitions, 45 changer transitions 0/613 dead transitions. [2022-07-12 10:17:24,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 613 transitions, 1868 flow [2022-07-12 10:17:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23865 transitions. [2022-07-12 10:17:24,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951024487756122 [2022-07-12 10:17:24,042 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23865 transitions. [2022-07-12 10:17:24,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23865 transitions. [2022-07-12 10:17:24,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:24,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23865 transitions. [2022-07-12 10:17:24,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 530.3333333333334) internal successors, (23865), 45 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,146 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 667.0) internal successors, (30682), 46 states have internal predecessors, (30682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,147 INFO L186 Difference]: Start difference. First operand has 617 places, 562 transitions, 1358 flow. Second operand 45 states and 23865 transitions. [2022-07-12 10:17:24,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 613 transitions, 1868 flow [2022-07-12 10:17:24,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 613 transitions, 1828 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:24,156 INFO L242 Difference]: Finished difference. Result has 664 places, 587 transitions, 1636 flow [2022-07-12 10:17:24,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1636, PETRI_PLACES=664, PETRI_TRANSITIONS=587} [2022-07-12 10:17:24,156 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 72 predicate places. [2022-07-12 10:17:24,156 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 587 transitions, 1636 flow [2022-07-12 10:17:24,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 530.7941176470588) internal successors, (18047), 34 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:24,158 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:24,159 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:24,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:24,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash 707886023, now seen corresponding path program 1 times [2022-07-12 10:17:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:24,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915953089] [2022-07-12 10:17:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:24,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:24,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:24,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915953089] [2022-07-12 10:17:24,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915953089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:24,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675071060] [2022-07-12 10:17:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:24,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:24,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:24,723 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-12 10:17:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:25,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:25,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:26,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675071060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:26,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:26,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:26,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074676545] [2022-07-12 10:17:26,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:26,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:26,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:26,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:26,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 528 out of 667 [2022-07-12 10:17:26,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 587 transitions, 1636 flow. Second operand has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:26,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:26,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 528 of 667 [2022-07-12 10:17:26,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:26,933 INFO L129 PetriNetUnfolder]: 0/686 cut-off events. [2022-07-12 10:17:26,933 INFO L130 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-07-12 10:17:26,934 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-07-12 10:17:26,935 INFO L132 encePairwiseOnDemand]: 662/667 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-07-12 10:17:26,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-07-12 10:17:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-12 10:17:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-12 10:17:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30212 transitions. [2022-07-12 10:17:26,946 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946553039269839 [2022-07-12 10:17:26,946 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30212 transitions. [2022-07-12 10:17:26,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30212 transitions. [2022-07-12 10:17:26,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:26,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30212 transitions. [2022-07-12 10:17:26,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 530.0350877192982) internal successors, (30212), 57 states have internal predecessors, (30212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:26,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:26,991 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 667.0) internal successors, (38686), 58 states have internal predecessors, (38686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:26,992 INFO L186 Difference]: Start difference. First operand has 664 places, 587 transitions, 1636 flow. Second operand 57 states and 30212 transitions. [2022-07-12 10:17:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-07-12 10:17:26,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:27,002 INFO L242 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-07-12 10:17:27,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=667, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-07-12 10:17:27,003 INFO L279 CegarLoopForPetriNet]: 592 programPoint places, 82 predicate places. [2022-07-12 10:17:27,003 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-07-12 10:17:27,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 530.8939393939394) internal successors, (35039), 66 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:27,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:27,006 INFO L200 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:27,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-12 10:17:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:27,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 540044470, now seen corresponding path program 1 times [2022-07-12 10:17:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:27,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12570073] [2022-07-12 10:17:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:27,233 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:27,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:27,279 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:27,279 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:27,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-07-12 10:17:27,280 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:27,280 WARN L231 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:27,280 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-07-12 10:17:27,322 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:27,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 621 places, 700 transitions, 1837 flow [2022-07-12 10:17:27,734 INFO L129 PetriNetUnfolder]: 194/1436 cut-off events. [2022-07-12 10:17:27,734 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-12 10:17:27,779 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 1436 events. 194/1436 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5451 event pairs, 0 based on Foata normal form. 0/1202 useless extension candidates. Maximal degree in co-relation 1562. Up to 40 conditions per place. [2022-07-12 10:17:27,779 INFO L82 GeneralOperation]: Start removeDead. Operand has 621 places, 700 transitions, 1837 flow [2022-07-12 10:17:27,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 621 places, 700 transitions, 1837 flow [2022-07-12 10:17:27,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:27,799 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:27,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:27,802 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2022-07-12 10:17:27,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:27,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:27,802 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] [2022-07-12 10:17:27,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 327553959, now seen corresponding path program 1 times [2022-07-12 10:17:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205230014] [2022-07-12 10:17:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205230014] [2022-07-12 10:17:27,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205230014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:27,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:27,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:27,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8187765] [2022-07-12 10:17:27,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:27,817 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 555 out of 700 [2022-07-12 10:17:27,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 700 transitions, 1837 flow. Second operand has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:27,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:27,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 555 of 700 [2022-07-12 10:17:27,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:28,201 INFO L129 PetriNetUnfolder]: 0/1197 cut-off events. [2022-07-12 10:17:28,202 INFO L130 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-07-12 10:17:28,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 1197 events. 0/1197 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 4960 event pairs, 0 based on Foata normal form. 6162/7321 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-07-12 10:17:28,204 INFO L132 encePairwiseOnDemand]: 579/700 looper letters, 28 selfloop transitions, 2 changer transitions 12/585 dead transitions. [2022-07-12 10:17:28,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 585 transitions, 1667 flow [2022-07-12 10:17:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1821 transitions. [2022-07-12 10:17:28,205 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8671428571428571 [2022-07-12 10:17:28,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1821 transitions. [2022-07-12 10:17:28,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1821 transitions. [2022-07-12 10:17:28,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:28,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1821 transitions. [2022-07-12 10:17:28,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 607.0) internal successors, (1821), 3 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 700.0) internal successors, (2800), 4 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,208 INFO L186 Difference]: Start difference. First operand has 621 places, 700 transitions, 1837 flow. Second operand 3 states and 1821 transitions. [2022-07-12 10:17:28,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 585 transitions, 1667 flow [2022-07-12 10:17:28,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 585 transitions, 1325 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:28,216 INFO L242 Difference]: Finished difference. Result has 623 places, 570 transitions, 1245 flow [2022-07-12 10:17:28,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1245, PETRI_PLACES=623, PETRI_TRANSITIONS=570} [2022-07-12 10:17:28,217 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 2 predicate places. [2022-07-12 10:17:28,217 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 570 transitions, 1245 flow [2022-07-12 10:17:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.0) internal successors, (1668), 3 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:28,218 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] [2022-07-12 10:17:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-07-12 10:17:28,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -770945952, now seen corresponding path program 1 times [2022-07-12 10:17:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960991784] [2022-07-12 10:17:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960991784] [2022-07-12 10:17:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960991784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:28,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532577403] [2022-07-12 10:17:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:28,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:28,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:28,248 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:28,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-12 10:17:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532577403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:28,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:28,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502135361] [2022-07-12 10:17:28,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:28,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:28,611 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-12 10:17:28,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 570 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:28,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-12 10:17:28,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:28,957 INFO L129 PetriNetUnfolder]: 0/943 cut-off events. [2022-07-12 10:17:28,957 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-12 10:17:28,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 943 events. 0/943 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3190 event pairs, 0 based on Foata normal form. 2/945 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-12 10:17:28,959 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 29 selfloop transitions, 9 changer transitions 0/580 dead transitions. [2022-07-12 10:17:28,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 580 transitions, 1343 flow [2022-07-12 10:17:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5026 transitions. [2022-07-12 10:17:28,961 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7977777777777778 [2022-07-12 10:17:28,961 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5026 transitions. [2022-07-12 10:17:28,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5026 transitions. [2022-07-12 10:17:28,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:28,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5026 transitions. [2022-07-12 10:17:28,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 558.4444444444445) internal successors, (5026), 9 states have internal predecessors, (5026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,967 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 700.0) internal successors, (7000), 10 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,967 INFO L186 Difference]: Start difference. First operand has 623 places, 570 transitions, 1245 flow. Second operand 9 states and 5026 transitions. [2022-07-12 10:17:28,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 580 transitions, 1343 flow [2022-07-12 10:17:28,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 580 transitions, 1341 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:28,976 INFO L242 Difference]: Finished difference. Result has 621 places, 576 transitions, 1293 flow [2022-07-12 10:17:28,977 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=621, PETRI_TRANSITIONS=576} [2022-07-12 10:17:28,977 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 0 predicate places. [2022-07-12 10:17:28,977 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 576 transitions, 1293 flow [2022-07-12 10:17:28,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 556.3) internal successors, (5563), 10 states have internal predecessors, (5563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:28,978 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:28,978 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] [2022-07-12 10:17:29,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:29,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -707134443, now seen corresponding path program 1 times [2022-07-12 10:17:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:29,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087176362] [2022-07-12 10:17:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:29,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087176362] [2022-07-12 10:17:29,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087176362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823457769] [2022-07-12 10:17:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:29,276 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:29,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-12 10:17:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:29,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:29,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823457769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:29,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:29,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:29,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427212561] [2022-07-12 10:17:29,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:29,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:29,805 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-12 10:17:29,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 576 transitions, 1293 flow. Second operand has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:29,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:29,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-12 10:17:29,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:30,231 INFO L129 PetriNetUnfolder]: 0/891 cut-off events. [2022-07-12 10:17:30,232 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-07-12 10:17:30,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 891 events. 0/891 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2837 event pairs, 0 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-12 10:17:30,233 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 37 selfloop transitions, 21 changer transitions 0/600 dead transitions. [2022-07-12 10:17:30,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 600 transitions, 1517 flow [2022-07-12 10:17:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11696 transitions. [2022-07-12 10:17:30,238 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956462585034013 [2022-07-12 10:17:30,238 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11696 transitions. [2022-07-12 10:17:30,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11696 transitions. [2022-07-12 10:17:30,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:30,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11696 transitions. [2022-07-12 10:17:30,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 556.952380952381) internal successors, (11696), 21 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,253 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 700.0) internal successors, (15400), 22 states have internal predecessors, (15400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,253 INFO L186 Difference]: Start difference. First operand has 621 places, 576 transitions, 1293 flow. Second operand 21 states and 11696 transitions. [2022-07-12 10:17:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 600 transitions, 1517 flow [2022-07-12 10:17:30,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 600 transitions, 1503 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:30,260 INFO L242 Difference]: Finished difference. Result has 645 places, 589 transitions, 1417 flow [2022-07-12 10:17:30,261 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1417, PETRI_PLACES=645, PETRI_TRANSITIONS=589} [2022-07-12 10:17:30,261 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 24 predicate places. [2022-07-12 10:17:30,261 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 589 transitions, 1417 flow [2022-07-12 10:17:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 556.6111111111111) internal successors, (10019), 18 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:30,262 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:30,262 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:30,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-12 10:17:30,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:30,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:30,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash 865014155, now seen corresponding path program 1 times [2022-07-12 10:17:30,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:30,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460092140] [2022-07-12 10:17:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:30,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460092140] [2022-07-12 10:17:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460092140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851575637] [2022-07-12 10:17:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:30,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:30,596 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:30,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-12 10:17:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:30,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:31,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:31,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851575637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:31,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:31,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:31,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645761994] [2022-07-12 10:17:31,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:31,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:31,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:31,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-12 10:17:31,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 589 transitions, 1417 flow. Second operand has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:31,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:31,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-12 10:17:31,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:31,957 INFO L129 PetriNetUnfolder]: 0/787 cut-off events. [2022-07-12 10:17:31,957 INFO L130 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-07-12 10:17:31,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 787 events. 0/787 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2155 event pairs, 0 based on Foata normal form. 8/795 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-07-12 10:17:31,959 INFO L132 encePairwiseOnDemand]: 694/700 looper letters, 53 selfloop transitions, 45 changer transitions 0/640 dead transitions. [2022-07-12 10:17:31,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 640 transitions, 1929 flow [2022-07-12 10:17:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 25036 transitions. [2022-07-12 10:17:31,968 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7947936507936508 [2022-07-12 10:17:31,968 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 25036 transitions. [2022-07-12 10:17:31,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 25036 transitions. [2022-07-12 10:17:31,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:31,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 25036 transitions. [2022-07-12 10:17:31,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 556.3555555555556) internal successors, (25036), 45 states have internal predecessors, (25036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,004 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 700.0) internal successors, (32200), 46 states have internal predecessors, (32200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,004 INFO L186 Difference]: Start difference. First operand has 645 places, 589 transitions, 1417 flow. Second operand 45 states and 25036 transitions. [2022-07-12 10:17:32,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 640 transitions, 1929 flow [2022-07-12 10:17:32,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 640 transitions, 1889 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:32,013 INFO L242 Difference]: Finished difference. Result has 692 places, 614 transitions, 1695 flow [2022-07-12 10:17:32,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1695, PETRI_PLACES=692, PETRI_TRANSITIONS=614} [2022-07-12 10:17:32,014 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 71 predicate places. [2022-07-12 10:17:32,014 INFO L495 AbstractCegarLoop]: Abstraction has has 692 places, 614 transitions, 1695 flow [2022-07-12 10:17:32,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 556.7941176470588) internal successors, (18931), 34 states have internal predecessors, (18931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:32,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:32,016 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:32,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:32,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-07-12 10:17:32,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1247181991, now seen corresponding path program 1 times [2022-07-12 10:17:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:32,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376177316] [2022-07-12 10:17:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:32,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376177316] [2022-07-12 10:17:32,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376177316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763544131] [2022-07-12 10:17:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:32,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:32,578 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:32,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-12 10:17:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:33,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:33,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763544131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:33,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:33,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:33,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329384943] [2022-07-12 10:17:33,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:33,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:33,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:33,833 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 554 out of 700 [2022-07-12 10:17:33,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 692 places, 614 transitions, 1695 flow. Second operand has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:33,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:33,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 554 of 700 [2022-07-12 10:17:33,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:34,814 INFO L129 PetriNetUnfolder]: 0/722 cut-off events. [2022-07-12 10:17:34,814 INFO L130 PetriNetUnfolder]: For 772/772 co-relation queries the response was YES. [2022-07-12 10:17:34,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 722 events. 0/722 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1757 event pairs, 0 based on Foata normal form. 5/727 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-07-12 10:17:34,816 INFO L132 encePairwiseOnDemand]: 695/700 looper letters, 60 selfloop transitions, 58 changer transitions 0/648 dead transitions. [2022-07-12 10:17:34,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 648 transitions, 2197 flow [2022-07-12 10:17:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:17:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:17:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 33363 transitions. [2022-07-12 10:17:34,828 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7943571428571429 [2022-07-12 10:17:34,828 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 33363 transitions. [2022-07-12 10:17:34,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 33363 transitions. [2022-07-12 10:17:34,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:34,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 33363 transitions. [2022-07-12 10:17:34,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 556.05) internal successors, (33363), 60 states have internal predecessors, (33363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,878 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 700.0) internal successors, (42700), 61 states have internal predecessors, (42700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,879 INFO L186 Difference]: Start difference. First operand has 692 places, 614 transitions, 1695 flow. Second operand 60 states and 33363 transitions. [2022-07-12 10:17:34,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 648 transitions, 2197 flow [2022-07-12 10:17:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 648 transitions, 2036 flow, removed 14 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:34,888 INFO L242 Difference]: Finished difference. Result has 705 places, 613 transitions, 1735 flow [2022-07-12 10:17:34,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=700, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1735, PETRI_PLACES=705, PETRI_TRANSITIONS=613} [2022-07-12 10:17:34,889 INFO L279 CegarLoopForPetriNet]: 621 programPoint places, 84 predicate places. [2022-07-12 10:17:34,889 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 613 transitions, 1735 flow [2022-07-12 10:17:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 556.8939393939394) internal successors, (36755), 66 states have internal predecessors, (36755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:34,892 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:34,893 INFO L200 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:34,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-07-12 10:17:35,093 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1309795873, now seen corresponding path program 1 times [2022-07-12 10:17:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:35,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043804546] [2022-07-12 10:17:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:35,118 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:35,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:35,169 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:35,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:35,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:35,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-07-12 10:17:35,169 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:35,170 WARN L231 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:35,170 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2022-07-12 10:17:35,214 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:35,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 650 places, 733 transitions, 1946 flow [2022-07-12 10:17:35,727 INFO L129 PetriNetUnfolder]: 204/1508 cut-off events. [2022-07-12 10:17:35,727 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-12 10:17:35,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 1508 events. 204/1508 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5720 event pairs, 0 based on Foata normal form. 0/1262 useless extension candidates. Maximal degree in co-relation 1656. Up to 42 conditions per place. [2022-07-12 10:17:35,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 650 places, 733 transitions, 1946 flow [2022-07-12 10:17:35,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 650 places, 733 transitions, 1946 flow [2022-07-12 10:17:35,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:35,819 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:35,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:35,823 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2022-07-12 10:17:35,823 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:35,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:35,823 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] [2022-07-12 10:17:35,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:35,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2053273849, now seen corresponding path program 1 times [2022-07-12 10:17:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:35,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641170015] [2022-07-12 10:17:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:35,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:35,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641170015] [2022-07-12 10:17:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641170015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:35,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:35,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513370615] [2022-07-12 10:17:35,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:35,841 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 581 out of 733 [2022-07-12 10:17:35,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 733 transitions, 1946 flow. Second operand has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:35,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:35,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 581 of 733 [2022-07-12 10:17:35,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:36,252 INFO L129 PetriNetUnfolder]: 0/1258 cut-off events. [2022-07-12 10:17:36,253 INFO L130 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2022-07-12 10:17:36,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 1258 events. 0/1258 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5235 event pairs, 0 based on Foata normal form. 6845/8063 useless extension candidates. Maximal degree in co-relation 0. Up to 120 conditions per place. [2022-07-12 10:17:36,255 INFO L132 encePairwiseOnDemand]: 606/733 looper letters, 29 selfloop transitions, 2 changer transitions 12/612 dead transitions. [2022-07-12 10:17:36,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 612 transitions, 1766 flow [2022-07-12 10:17:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1906 transitions. [2022-07-12 10:17:36,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8667576170986813 [2022-07-12 10:17:36,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1906 transitions. [2022-07-12 10:17:36,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1906 transitions. [2022-07-12 10:17:36,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:36,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1906 transitions. [2022-07-12 10:17:36,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 635.3333333333334) internal successors, (1906), 3 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 733.0) internal successors, (2932), 4 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,259 INFO L186 Difference]: Start difference. First operand has 650 places, 733 transitions, 1946 flow. Second operand 3 states and 1906 transitions. [2022-07-12 10:17:36,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 612 transitions, 1766 flow [2022-07-12 10:17:36,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 612 transitions, 1386 flow, removed 190 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:36,267 INFO L242 Difference]: Finished difference. Result has 652 places, 597 transitions, 1304 flow [2022-07-12 10:17:36,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1304, PETRI_PLACES=652, PETRI_TRANSITIONS=597} [2022-07-12 10:17:36,268 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 2 predicate places. [2022-07-12 10:17:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 597 transitions, 1304 flow [2022-07-12 10:17:36,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 582.0) internal successors, (1746), 3 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:36,268 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] [2022-07-12 10:17:36,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-07-12 10:17:36,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 208730624, now seen corresponding path program 1 times [2022-07-12 10:17:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:36,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94935963] [2022-07-12 10:17:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94935963] [2022-07-12 10:17:36,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94935963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:36,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585259421] [2022-07-12 10:17:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:36,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:36,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:36,295 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:36,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-12 10:17:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:36,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585259421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:36,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:36,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762418738] [2022-07-12 10:17:36,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:36,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:36,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:36,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-12 10:17:36,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 597 transitions, 1304 flow. Second operand has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:36,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:36,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-12 10:17:36,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:37,080 INFO L129 PetriNetUnfolder]: 0/992 cut-off events. [2022-07-12 10:17:37,080 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-12 10:17:37,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 992 events. 0/992 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3363 event pairs, 0 based on Foata normal form. 2/994 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-12 10:17:37,082 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 30 selfloop transitions, 9 changer transitions 0/607 dead transitions. [2022-07-12 10:17:37,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 607 transitions, 1404 flow [2022-07-12 10:17:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5261 transitions. [2022-07-12 10:17:37,084 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7974837047142641 [2022-07-12 10:17:37,084 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5261 transitions. [2022-07-12 10:17:37,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5261 transitions. [2022-07-12 10:17:37,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:37,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5261 transitions. [2022-07-12 10:17:37,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 584.5555555555555) internal successors, (5261), 9 states have internal predecessors, (5261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,091 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 733.0) internal successors, (7330), 10 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,091 INFO L186 Difference]: Start difference. First operand has 652 places, 597 transitions, 1304 flow. Second operand 9 states and 5261 transitions. [2022-07-12 10:17:37,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 607 transitions, 1404 flow [2022-07-12 10:17:37,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 607 transitions, 1402 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:37,097 INFO L242 Difference]: Finished difference. Result has 650 places, 603 transitions, 1352 flow [2022-07-12 10:17:37,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=650, PETRI_TRANSITIONS=603} [2022-07-12 10:17:37,097 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 0 predicate places. [2022-07-12 10:17:37,098 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 603 transitions, 1352 flow [2022-07-12 10:17:37,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 582.3) internal successors, (5823), 10 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,098 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:37,098 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] [2022-07-12 10:17:37,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:37,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-12 10:17:37,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:37,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:37,300 INFO L85 PathProgramCache]: Analyzing trace with hash 329362997, now seen corresponding path program 1 times [2022-07-12 10:17:37,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:37,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737614971] [2022-07-12 10:17:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:37,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:37,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737614971] [2022-07-12 10:17:37,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737614971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624757904] [2022-07-12 10:17:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:37,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:37,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:37,349 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:37,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-12 10:17:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:37,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:37,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624757904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:37,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:37,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78000218] [2022-07-12 10:17:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:37,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:37,827 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-12 10:17:37,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 603 transitions, 1352 flow. Second operand has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:37,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:37,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-12 10:17:37,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:38,317 INFO L129 PetriNetUnfolder]: 0/940 cut-off events. [2022-07-12 10:17:38,318 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-07-12 10:17:38,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 940 events. 0/940 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3025 event pairs, 0 based on Foata normal form. 4/944 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-12 10:17:38,320 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 38 selfloop transitions, 21 changer transitions 0/627 dead transitions. [2022-07-12 10:17:38,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 627 transitions, 1578 flow [2022-07-12 10:17:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12243 transitions. [2022-07-12 10:17:38,325 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7953615279672579 [2022-07-12 10:17:38,325 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12243 transitions. [2022-07-12 10:17:38,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12243 transitions. [2022-07-12 10:17:38,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:38,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12243 transitions. [2022-07-12 10:17:38,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 583.0) internal successors, (12243), 21 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,341 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 733.0) internal successors, (16126), 22 states have internal predecessors, (16126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,341 INFO L186 Difference]: Start difference. First operand has 650 places, 603 transitions, 1352 flow. Second operand 21 states and 12243 transitions. [2022-07-12 10:17:38,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 627 transitions, 1578 flow [2022-07-12 10:17:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 627 transitions, 1564 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:38,349 INFO L242 Difference]: Finished difference. Result has 674 places, 616 transitions, 1476 flow [2022-07-12 10:17:38,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1476, PETRI_PLACES=674, PETRI_TRANSITIONS=616} [2022-07-12 10:17:38,349 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 24 predicate places. [2022-07-12 10:17:38,349 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 616 transitions, 1476 flow [2022-07-12 10:17:38,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 582.6111111111111) internal successors, (10487), 18 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:38,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:38,350 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:38,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-12 10:17:38,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-12 10:17:38,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 179244203, now seen corresponding path program 1 times [2022-07-12 10:17:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853486041] [2022-07-12 10:17:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:38,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:38,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:38,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853486041] [2022-07-12 10:17:38,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853486041] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:38,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652814992] [2022-07-12 10:17:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:38,661 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:38,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-12 10:17:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:39,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652814992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:39,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:39,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:39,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626723780] [2022-07-12 10:17:39,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:39,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:39,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:39,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-12 10:17:39,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 616 transitions, 1476 flow. Second operand has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:39,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:39,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-12 10:17:39,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:40,123 INFO L129 PetriNetUnfolder]: 0/836 cut-off events. [2022-07-12 10:17:40,123 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2022-07-12 10:17:40,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 836 events. 0/836 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2343 event pairs, 0 based on Foata normal form. 8/844 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-07-12 10:17:40,125 INFO L132 encePairwiseOnDemand]: 727/733 looper letters, 54 selfloop transitions, 45 changer transitions 0/667 dead transitions. [2022-07-12 10:17:40,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 667 transitions, 1990 flow [2022-07-12 10:17:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 26207 transitions. [2022-07-12 10:17:40,139 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7945126572684553 [2022-07-12 10:17:40,139 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 26207 transitions. [2022-07-12 10:17:40,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 26207 transitions. [2022-07-12 10:17:40,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:40,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 26207 transitions. [2022-07-12 10:17:40,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 582.3777777777777) internal successors, (26207), 45 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,189 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 733.0) internal successors, (33718), 46 states have internal predecessors, (33718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,189 INFO L186 Difference]: Start difference. First operand has 674 places, 616 transitions, 1476 flow. Second operand 45 states and 26207 transitions. [2022-07-12 10:17:40,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 667 transitions, 1990 flow [2022-07-12 10:17:40,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 667 transitions, 1950 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:40,198 INFO L242 Difference]: Finished difference. Result has 721 places, 641 transitions, 1754 flow [2022-07-12 10:17:40,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1754, PETRI_PLACES=721, PETRI_TRANSITIONS=641} [2022-07-12 10:17:40,199 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 71 predicate places. [2022-07-12 10:17:40,199 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 641 transitions, 1754 flow [2022-07-12 10:17:40,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 582.7941176470588) internal successors, (19815), 34 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:40,201 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:40,201 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:40,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-12 10:17:40,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-12 10:17:40,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash -235927097, now seen corresponding path program 1 times [2022-07-12 10:17:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:40,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880293830] [2022-07-12 10:17:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:40,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:40,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880293830] [2022-07-12 10:17:40,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880293830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:40,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980042056] [2022-07-12 10:17:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:40,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:40,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:40,743 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:40,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-12 10:17:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:41,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:42,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980042056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:42,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:42,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:42,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337507408] [2022-07-12 10:17:42,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:42,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:42,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:42,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:42,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:42,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 580 out of 733 [2022-07-12 10:17:42,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 641 transitions, 1754 flow. Second operand has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:42,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:42,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 580 of 733 [2022-07-12 10:17:42,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:43,231 INFO L129 PetriNetUnfolder]: 0/758 cut-off events. [2022-07-12 10:17:43,231 INFO L130 PetriNetUnfolder]: For 893/893 co-relation queries the response was YES. [2022-07-12 10:17:43,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 758 events. 0/758 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1855 event pairs, 0 based on Foata normal form. 6/764 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:17:43,233 INFO L132 encePairwiseOnDemand]: 728/733 looper letters, 63 selfloop transitions, 61 changer transitions 0/680 dead transitions. [2022-07-12 10:17:43,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 680 transitions, 2312 flow [2022-07-12 10:17:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 10:17:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-12 10:17:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 36670 transitions. [2022-07-12 10:17:43,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.794083890946101 [2022-07-12 10:17:43,246 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 36670 transitions. [2022-07-12 10:17:43,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 36670 transitions. [2022-07-12 10:17:43,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:43,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 36670 transitions. [2022-07-12 10:17:43,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 582.063492063492) internal successors, (36670), 63 states have internal predecessors, (36670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,303 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 733.0) internal successors, (46912), 64 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,304 INFO L186 Difference]: Start difference. First operand has 721 places, 641 transitions, 1754 flow. Second operand 63 states and 36670 transitions. [2022-07-12 10:17:43,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 680 transitions, 2312 flow [2022-07-12 10:17:43,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 680 transitions, 2143 flow, removed 15 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:43,315 INFO L242 Difference]: Finished difference. Result has 737 places, 643 transitions, 1823 flow [2022-07-12 10:17:43,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=733, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1823, PETRI_PLACES=737, PETRI_TRANSITIONS=643} [2022-07-12 10:17:43,315 INFO L279 CegarLoopForPetriNet]: 650 programPoint places, 87 predicate places. [2022-07-12 10:17:43,316 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 643 transitions, 1823 flow [2022-07-12 10:17:43,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 582.8939393939394) internal successors, (38471), 66 states have internal predecessors, (38471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:43,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:43,319 INFO L200 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:43,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-12 10:17:43,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-12 10:17:43,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1626237267, now seen corresponding path program 1 times [2022-07-12 10:17:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:43,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311037817] [2022-07-12 10:17:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:43,551 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:43,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:43,603 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:43,603 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:43,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:43,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-07-12 10:17:43,604 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:43,604 WARN L231 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:43,605 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2022-07-12 10:17:43,654 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:43,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 679 places, 766 transitions, 2057 flow [2022-07-12 10:17:44,071 INFO L129 PetriNetUnfolder]: 214/1580 cut-off events. [2022-07-12 10:17:44,071 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-12 10:17:44,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 1580 events. 214/1580 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6012 event pairs, 0 based on Foata normal form. 0/1322 useless extension candidates. Maximal degree in co-relation 1751. Up to 44 conditions per place. [2022-07-12 10:17:44,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 679 places, 766 transitions, 2057 flow [2022-07-12 10:17:44,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 679 places, 766 transitions, 2057 flow [2022-07-12 10:17:44,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:44,155 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:44,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:44,158 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2022-07-12 10:17:44,158 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:44,158 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:44,158 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] [2022-07-12 10:17:44,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1599402311, now seen corresponding path program 1 times [2022-07-12 10:17:44,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:44,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748403193] [2022-07-12 10:17:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:44,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748403193] [2022-07-12 10:17:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748403193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:44,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572076213] [2022-07-12 10:17:44,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:44,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:44,177 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 607 out of 766 [2022-07-12 10:17:44,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 766 transitions, 2057 flow. Second operand has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:44,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:44,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 607 of 766 [2022-07-12 10:17:44,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:44,641 INFO L129 PetriNetUnfolder]: 0/1319 cut-off events. [2022-07-12 10:17:44,641 INFO L130 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2022-07-12 10:17:44,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 1319 events. 0/1319 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5476 event pairs, 0 based on Foata normal form. 7564/8841 useless extension candidates. Maximal degree in co-relation 0. Up to 126 conditions per place. [2022-07-12 10:17:44,644 INFO L132 encePairwiseOnDemand]: 633/766 looper letters, 30 selfloop transitions, 2 changer transitions 12/639 dead transitions. [2022-07-12 10:17:44,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 639 transitions, 1867 flow [2022-07-12 10:17:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1991 transitions. [2022-07-12 10:17:44,646 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8664055700609226 [2022-07-12 10:17:44,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1991 transitions. [2022-07-12 10:17:44,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1991 transitions. [2022-07-12 10:17:44,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:44,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1991 transitions. [2022-07-12 10:17:44,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 663.6666666666666) internal successors, (1991), 3 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:44,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:44,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 766.0) internal successors, (3064), 4 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:44,649 INFO L186 Difference]: Start difference. First operand has 679 places, 766 transitions, 2057 flow. Second operand 3 states and 1991 transitions. [2022-07-12 10:17:44,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 639 transitions, 1867 flow [2022-07-12 10:17:44,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 639 transitions, 1447 flow, removed 210 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:44,657 INFO L242 Difference]: Finished difference. Result has 681 places, 624 transitions, 1363 flow [2022-07-12 10:17:44,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1363, PETRI_PLACES=681, PETRI_TRANSITIONS=624} [2022-07-12 10:17:44,658 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 2 predicate places. [2022-07-12 10:17:44,658 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 624 transitions, 1363 flow [2022-07-12 10:17:44,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 608.0) internal successors, (1824), 3 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:44,658 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:44,658 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] [2022-07-12 10:17:44,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-07-12 10:17:44,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash 163924768, now seen corresponding path program 1 times [2022-07-12 10:17:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935405954] [2022-07-12 10:17:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:44,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:44,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935405954] [2022-07-12 10:17:44,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935405954] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:44,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076372943] [2022-07-12 10:17:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:44,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:44,688 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:44,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-12 10:17:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:45,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:45,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076372943] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:45,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:45,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82161072] [2022-07-12 10:17:45,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:45,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:45,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-12 10:17:45,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 624 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:45,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:45,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-12 10:17:45,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:45,521 INFO L129 PetriNetUnfolder]: 0/1041 cut-off events. [2022-07-12 10:17:45,521 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-07-12 10:17:45,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 1041 events. 0/1041 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3549 event pairs, 0 based on Foata normal form. 2/1043 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-12 10:17:45,524 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 31 selfloop transitions, 9 changer transitions 0/634 dead transitions. [2022-07-12 10:17:45,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 634 transitions, 1465 flow [2022-07-12 10:17:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5496 transitions. [2022-07-12 10:17:45,526 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7972149695387293 [2022-07-12 10:17:45,526 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5496 transitions. [2022-07-12 10:17:45,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5496 transitions. [2022-07-12 10:17:45,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:45,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5496 transitions. [2022-07-12 10:17:45,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 610.6666666666666) internal successors, (5496), 9 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:45,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:45,533 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 766.0) internal successors, (7660), 10 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:45,533 INFO L186 Difference]: Start difference. First operand has 681 places, 624 transitions, 1363 flow. Second operand 9 states and 5496 transitions. [2022-07-12 10:17:45,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 634 transitions, 1465 flow [2022-07-12 10:17:45,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 634 transitions, 1463 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:45,540 INFO L242 Difference]: Finished difference. Result has 679 places, 630 transitions, 1411 flow [2022-07-12 10:17:45,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=679, PETRI_TRANSITIONS=630} [2022-07-12 10:17:45,541 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 0 predicate places. [2022-07-12 10:17:45,541 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 630 transitions, 1411 flow [2022-07-12 10:17:45,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 608.3) internal successors, (6083), 10 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:45,542 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:45,542 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] [2022-07-12 10:17:45,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-12 10:17:45,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:45,743 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash -766737131, now seen corresponding path program 1 times [2022-07-12 10:17:45,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:45,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282470781] [2022-07-12 10:17:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282470781] [2022-07-12 10:17:45,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282470781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602961112] [2022-07-12 10:17:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:45,803 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:45,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-12 10:17:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:46,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602961112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:46,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:46,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:46,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053918276] [2022-07-12 10:17:46,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:46,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:46,321 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-12 10:17:46,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 630 transitions, 1411 flow. Second operand has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:46,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-12 10:17:46,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:46,841 INFO L129 PetriNetUnfolder]: 0/989 cut-off events. [2022-07-12 10:17:46,841 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-12 10:17:46,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 989 events. 0/989 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3208 event pairs, 0 based on Foata normal form. 4/993 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-12 10:17:46,843 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 39 selfloop transitions, 21 changer transitions 0/654 dead transitions. [2022-07-12 10:17:46,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 654 transitions, 1639 flow [2022-07-12 10:17:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 12790 transitions. [2022-07-12 10:17:46,848 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951013303493721 [2022-07-12 10:17:46,848 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 12790 transitions. [2022-07-12 10:17:46,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 12790 transitions. [2022-07-12 10:17:46,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:46,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 12790 transitions. [2022-07-12 10:17:46,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 609.047619047619) internal successors, (12790), 21 states have internal predecessors, (12790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,866 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 766.0) internal successors, (16852), 22 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,866 INFO L186 Difference]: Start difference. First operand has 679 places, 630 transitions, 1411 flow. Second operand 21 states and 12790 transitions. [2022-07-12 10:17:46,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 654 transitions, 1639 flow [2022-07-12 10:17:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 654 transitions, 1625 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:46,874 INFO L242 Difference]: Finished difference. Result has 703 places, 643 transitions, 1535 flow [2022-07-12 10:17:46,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1535, PETRI_PLACES=703, PETRI_TRANSITIONS=643} [2022-07-12 10:17:46,875 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 24 predicate places. [2022-07-12 10:17:46,875 INFO L495 AbstractCegarLoop]: Abstraction has has 703 places, 643 transitions, 1535 flow [2022-07-12 10:17:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 608.6111111111111) internal successors, (10955), 18 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:46,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:46,876 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:46,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-12 10:17:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:47,077 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1338101515, now seen corresponding path program 1 times [2022-07-12 10:17:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847295053] [2022-07-12 10:17:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:47,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:47,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847295053] [2022-07-12 10:17:47,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847295053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:47,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905306573] [2022-07-12 10:17:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:47,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:47,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:47,182 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:47,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-12 10:17:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:47,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:47,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:47,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905306573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:47,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:47,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310340690] [2022-07-12 10:17:47,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:47,892 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-12 10:17:47,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 643 transitions, 1535 flow. Second operand has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:47,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:47,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-12 10:17:47,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:48,657 INFO L129 PetriNetUnfolder]: 0/885 cut-off events. [2022-07-12 10:17:48,658 INFO L130 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2022-07-12 10:17:48,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 885 events. 0/885 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2524 event pairs, 0 based on Foata normal form. 8/893 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-07-12 10:17:48,659 INFO L132 encePairwiseOnDemand]: 760/766 looper letters, 55 selfloop transitions, 45 changer transitions 0/694 dead transitions. [2022-07-12 10:17:48,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 694 transitions, 2051 flow [2022-07-12 10:17:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 27378 transitions. [2022-07-12 10:17:48,669 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942558746736292 [2022-07-12 10:17:48,669 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 27378 transitions. [2022-07-12 10:17:48,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 27378 transitions. [2022-07-12 10:17:48,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:48,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 27378 transitions. [2022-07-12 10:17:48,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 608.4) internal successors, (27378), 45 states have internal predecessors, (27378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,707 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 766.0) internal successors, (35236), 46 states have internal predecessors, (35236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,708 INFO L186 Difference]: Start difference. First operand has 703 places, 643 transitions, 1535 flow. Second operand 45 states and 27378 transitions. [2022-07-12 10:17:48,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 694 transitions, 2051 flow [2022-07-12 10:17:48,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 694 transitions, 2011 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:48,717 INFO L242 Difference]: Finished difference. Result has 750 places, 668 transitions, 1813 flow [2022-07-12 10:17:48,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1813, PETRI_PLACES=750, PETRI_TRANSITIONS=668} [2022-07-12 10:17:48,718 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 71 predicate places. [2022-07-12 10:17:48,718 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 668 transitions, 1813 flow [2022-07-12 10:17:48,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 608.7941176470588) internal successors, (20699), 34 states have internal predecessors, (20699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:48,720 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:48,720 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:48,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-12 10:17:48,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:48,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash 553526055, now seen corresponding path program 1 times [2022-07-12 10:17:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:48,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449094197] [2022-07-12 10:17:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449094197] [2022-07-12 10:17:49,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449094197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440714082] [2022-07-12 10:17:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:49,237 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:49,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-12 10:17:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:49,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:50,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440714082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:50,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:50,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303293086] [2022-07-12 10:17:50,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:50,626 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 606 out of 766 [2022-07-12 10:17:50,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 668 transitions, 1813 flow. Second operand has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:50,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:50,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 606 of 766 [2022-07-12 10:17:50,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:51,790 INFO L129 PetriNetUnfolder]: 0/794 cut-off events. [2022-07-12 10:17:51,790 INFO L130 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2022-07-12 10:17:51,790 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 794 events. 0/794 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1953 event pairs, 0 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-07-12 10:17:51,791 INFO L132 encePairwiseOnDemand]: 761/766 looper letters, 66 selfloop transitions, 64 changer transitions 0/712 dead transitions. [2022-07-12 10:17:51,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 712 transitions, 2427 flow [2022-07-12 10:17:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 10:17:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-12 10:17:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 40133 transitions. [2022-07-12 10:17:51,806 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938325816915895 [2022-07-12 10:17:51,806 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 40133 transitions. [2022-07-12 10:17:51,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 40133 transitions. [2022-07-12 10:17:51,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:51,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 40133 transitions. [2022-07-12 10:17:51,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 608.0757575757576) internal successors, (40133), 66 states have internal predecessors, (40133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:51,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:51,872 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 766.0) internal successors, (51322), 67 states have internal predecessors, (51322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:51,872 INFO L186 Difference]: Start difference. First operand has 750 places, 668 transitions, 1813 flow. Second operand 66 states and 40133 transitions. [2022-07-12 10:17:51,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 712 transitions, 2427 flow [2022-07-12 10:17:51,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 769 places, 712 transitions, 2250 flow, removed 16 selfloop flow, removed 33 redundant places. [2022-07-12 10:17:51,883 INFO L242 Difference]: Finished difference. Result has 769 places, 673 transitions, 1911 flow [2022-07-12 10:17:51,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=766, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1911, PETRI_PLACES=769, PETRI_TRANSITIONS=673} [2022-07-12 10:17:51,884 INFO L279 CegarLoopForPetriNet]: 679 programPoint places, 90 predicate places. [2022-07-12 10:17:51,884 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 673 transitions, 1911 flow [2022-07-12 10:17:51,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 608.8939393939394) internal successors, (40187), 66 states have internal predecessors, (40187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:51,887 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:51,888 INFO L200 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:51,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-12 10:17:52,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-07-12 10:17:52,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash -243572998, now seen corresponding path program 1 times [2022-07-12 10:17:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:52,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848706278] [2022-07-12 10:17:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:52,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:52,121 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:17:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:17:52,179 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:17:52,179 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:17:52,179 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:17:52,180 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:17:52,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-07-12 10:17:52,180 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:17:52,180 WARN L231 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:17:52,180 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2022-07-12 10:17:52,225 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:17:52,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 708 places, 799 transitions, 2170 flow [2022-07-12 10:17:52,837 INFO L129 PetriNetUnfolder]: 224/1652 cut-off events. [2022-07-12 10:17:52,837 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-12 10:17:52,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 1652 events. 224/1652 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6314 event pairs, 0 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 1847. Up to 46 conditions per place. [2022-07-12 10:17:52,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 708 places, 799 transitions, 2170 flow [2022-07-12 10:17:52,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 708 places, 799 transitions, 2170 flow [2022-07-12 10:17:52,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:17:52,911 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:17:52,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:17:52,914 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-12 10:17:52,914 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:17:52,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:52,914 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] [2022-07-12 10:17:52,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:52,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1599319449, now seen corresponding path program 1 times [2022-07-12 10:17:52,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:52,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777831990] [2022-07-12 10:17:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:52,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:52,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777831990] [2022-07-12 10:17:52,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777831990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:17:52,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:17:52,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:17:52,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737025500] [2022-07-12 10:17:52,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:17:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:17:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:17:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:17:52,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 633 out of 799 [2022-07-12 10:17:52,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 799 transitions, 2170 flow. Second operand has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:52,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:52,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 633 of 799 [2022-07-12 10:17:52,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:53,444 INFO L129 PetriNetUnfolder]: 0/1380 cut-off events. [2022-07-12 10:17:53,444 INFO L130 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2022-07-12 10:17:53,444 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1837 conditions, 1380 events. 0/1380 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 5779 event pairs, 0 based on Foata normal form. 8319/9655 useless extension candidates. Maximal degree in co-relation 0. Up to 132 conditions per place. [2022-07-12 10:17:53,447 INFO L132 encePairwiseOnDemand]: 660/799 looper letters, 31 selfloop transitions, 2 changer transitions 12/666 dead transitions. [2022-07-12 10:17:53,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 666 transitions, 1970 flow [2022-07-12 10:17:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:17:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:17:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2076 transitions. [2022-07-12 10:17:53,449 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8660826032540676 [2022-07-12 10:17:53,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2076 transitions. [2022-07-12 10:17:53,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2076 transitions. [2022-07-12 10:17:53,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:53,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2076 transitions. [2022-07-12 10:17:53,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 692.0) internal successors, (2076), 3 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:53,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:53,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 799.0) internal successors, (3196), 4 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:53,452 INFO L186 Difference]: Start difference. First operand has 708 places, 799 transitions, 2170 flow. Second operand 3 states and 2076 transitions. [2022-07-12 10:17:53,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 666 transitions, 1970 flow [2022-07-12 10:17:53,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 666 transitions, 1508 flow, removed 231 selfloop flow, removed 0 redundant places. [2022-07-12 10:17:53,461 INFO L242 Difference]: Finished difference. Result has 710 places, 651 transitions, 1422 flow [2022-07-12 10:17:53,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1422, PETRI_PLACES=710, PETRI_TRANSITIONS=651} [2022-07-12 10:17:53,461 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 2 predicate places. [2022-07-12 10:17:53,461 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 651 transitions, 1422 flow [2022-07-12 10:17:53,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 634.0) internal successors, (1902), 3 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:53,462 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:53,462 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] [2022-07-12 10:17:53,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-07-12 10:17:53,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash -905363520, now seen corresponding path program 1 times [2022-07-12 10:17:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:53,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627542048] [2022-07-12 10:17:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:53,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627542048] [2022-07-12 10:17:53,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627542048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005168972] [2022-07-12 10:17:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:53,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:53,488 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:53,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-12 10:17:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:17:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:53,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:53,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005168972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:53,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:53,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:17:53,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124095623] [2022-07-12 10:17:53,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:53,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:17:53,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:17:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:17:53,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-12 10:17:53,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 651 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:53,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:53,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-12 10:17:53,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:54,364 INFO L129 PetriNetUnfolder]: 0/1090 cut-off events. [2022-07-12 10:17:54,365 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-12 10:17:54,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 1090 events. 0/1090 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3730 event pairs, 0 based on Foata normal form. 2/1092 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-12 10:17:54,367 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 32 selfloop transitions, 9 changer transitions 0/661 dead transitions. [2022-07-12 10:17:54,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 661 transitions, 1526 flow [2022-07-12 10:17:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:17:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:17:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5731 transitions. [2022-07-12 10:17:54,370 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7969684327631762 [2022-07-12 10:17:54,370 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5731 transitions. [2022-07-12 10:17:54,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5731 transitions. [2022-07-12 10:17:54,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:54,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5731 transitions. [2022-07-12 10:17:54,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 636.7777777777778) internal successors, (5731), 9 states have internal predecessors, (5731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:54,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:54,377 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 799.0) internal successors, (7990), 10 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:54,377 INFO L186 Difference]: Start difference. First operand has 710 places, 651 transitions, 1422 flow. Second operand 9 states and 5731 transitions. [2022-07-12 10:17:54,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 661 transitions, 1526 flow [2022-07-12 10:17:54,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 661 transitions, 1524 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:54,385 INFO L242 Difference]: Finished difference. Result has 708 places, 657 transitions, 1470 flow [2022-07-12 10:17:54,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1470, PETRI_PLACES=708, PETRI_TRANSITIONS=657} [2022-07-12 10:17:54,385 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 0 predicate places. [2022-07-12 10:17:54,385 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 657 transitions, 1470 flow [2022-07-12 10:17:54,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 634.3) internal successors, (6343), 10 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:54,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:54,386 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] [2022-07-12 10:17:54,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-12 10:17:54,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-07-12 10:17:54,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash 299532469, now seen corresponding path program 1 times [2022-07-12 10:17:54,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:54,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4189366] [2022-07-12 10:17:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:54,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4189366] [2022-07-12 10:17:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4189366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78883130] [2022-07-12 10:17:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:54,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:54,636 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:54,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-12 10:17:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:17:55,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:55,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:55,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78883130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:55,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:55,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:17:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165080459] [2022-07-12 10:17:55,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:55,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:17:55,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:17:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:17:55,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-12 10:17:55,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 657 transitions, 1470 flow. Second operand has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:55,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-12 10:17:55,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:55,774 INFO L129 PetriNetUnfolder]: 0/1038 cut-off events. [2022-07-12 10:17:55,774 INFO L130 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-07-12 10:17:55,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1038 events. 0/1038 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3390 event pairs, 0 based on Foata normal form. 4/1042 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-12 10:17:55,777 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 40 selfloop transitions, 21 changer transitions 0/681 dead transitions. [2022-07-12 10:17:55,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 681 transitions, 1700 flow [2022-07-12 10:17:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:17:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:17:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13337 transitions. [2022-07-12 10:17:55,782 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7948626259014244 [2022-07-12 10:17:55,782 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13337 transitions. [2022-07-12 10:17:55,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13337 transitions. [2022-07-12 10:17:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13337 transitions. [2022-07-12 10:17:55,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 635.0952380952381) internal successors, (13337), 21 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,800 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 799.0) internal successors, (17578), 22 states have internal predecessors, (17578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,800 INFO L186 Difference]: Start difference. First operand has 708 places, 657 transitions, 1470 flow. Second operand 21 states and 13337 transitions. [2022-07-12 10:17:55,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 681 transitions, 1700 flow [2022-07-12 10:17:55,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 681 transitions, 1686 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:17:55,809 INFO L242 Difference]: Finished difference. Result has 732 places, 670 transitions, 1594 flow [2022-07-12 10:17:55,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1594, PETRI_PLACES=732, PETRI_TRANSITIONS=670} [2022-07-12 10:17:55,809 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 24 predicate places. [2022-07-12 10:17:55,809 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 670 transitions, 1594 flow [2022-07-12 10:17:55,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 634.6111111111111) internal successors, (11423), 18 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:55,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:55,811 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:55,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-07-12 10:17:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:56,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 46618795, now seen corresponding path program 1 times [2022-07-12 10:17:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224016509] [2022-07-12 10:17:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224016509] [2022-07-12 10:17:56,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224016509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:56,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392928439] [2022-07-12 10:17:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:56,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:56,125 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:56,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-12 10:17:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:56,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:17:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:56,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392928439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:56,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:56,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:17:56,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111224429] [2022-07-12 10:17:56,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:56,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:17:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:17:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:17:56,876 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-12 10:17:56,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 670 transitions, 1594 flow. Second operand has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:56,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:56,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-12 10:17:56,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:17:57,816 INFO L129 PetriNetUnfolder]: 0/934 cut-off events. [2022-07-12 10:17:57,816 INFO L130 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-07-12 10:17:57,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 934 events. 0/934 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2707 event pairs, 0 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-07-12 10:17:57,819 INFO L132 encePairwiseOnDemand]: 793/799 looper letters, 56 selfloop transitions, 45 changer transitions 0/721 dead transitions. [2022-07-12 10:17:57,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 721 transitions, 2112 flow [2022-07-12 10:17:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:17:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:17:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 28549 transitions. [2022-07-12 10:17:57,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940203031567237 [2022-07-12 10:17:57,834 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 28549 transitions. [2022-07-12 10:17:57,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 28549 transitions. [2022-07-12 10:17:57,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:17:57,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 28549 transitions. [2022-07-12 10:17:57,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 634.4222222222222) internal successors, (28549), 45 states have internal predecessors, (28549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,875 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 799.0) internal successors, (36754), 46 states have internal predecessors, (36754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,875 INFO L186 Difference]: Start difference. First operand has 732 places, 670 transitions, 1594 flow. Second operand 45 states and 28549 transitions. [2022-07-12 10:17:57,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 721 transitions, 2112 flow [2022-07-12 10:17:57,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 721 transitions, 2072 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:17:57,885 INFO L242 Difference]: Finished difference. Result has 779 places, 695 transitions, 1872 flow [2022-07-12 10:17:57,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1872, PETRI_PLACES=779, PETRI_TRANSITIONS=695} [2022-07-12 10:17:57,885 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 71 predicate places. [2022-07-12 10:17:57,885 INFO L495 AbstractCegarLoop]: Abstraction has has 779 places, 695 transitions, 1872 flow [2022-07-12 10:17:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 634.7941176470588) internal successors, (21583), 34 states have internal predecessors, (21583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:57,887 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:17:57,887 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:17:57,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-07-12 10:17:58,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-07-12 10:17:58,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:17:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:17:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -679425849, now seen corresponding path program 1 times [2022-07-12 10:17:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:17:58,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701318869] [2022-07-12 10:17:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:17:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:58,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:17:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701318869] [2022-07-12 10:17:58,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701318869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:17:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083249445] [2022-07-12 10:17:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:17:58,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:17:58,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:17:58,443 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:17:58,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-12 10:17:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:17:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:17:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:17:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:59,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:17:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:17:59,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083249445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:17:59,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:17:59,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:17:59,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229142829] [2022-07-12 10:17:59,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:17:59,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:17:59,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:17:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:17:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:17:59,809 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 632 out of 799 [2022-07-12 10:17:59,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 779 places, 695 transitions, 1872 flow. Second operand has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:17:59,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:17:59,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 632 of 799 [2022-07-12 10:17:59,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:01,039 INFO L129 PetriNetUnfolder]: 0/830 cut-off events. [2022-07-12 10:18:01,039 INFO L130 PetriNetUnfolder]: For 1135/1135 co-relation queries the response was YES. [2022-07-12 10:18:01,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 830 events. 0/830 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2051 event pairs, 0 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-07-12 10:18:01,041 INFO L132 encePairwiseOnDemand]: 794/799 looper letters, 69 selfloop transitions, 67 changer transitions 0/744 dead transitions. [2022-07-12 10:18:01,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 744 transitions, 2542 flow [2022-07-12 10:18:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-12 10:18:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-12 10:18:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 43752 transitions. [2022-07-12 10:18:01,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936006965228275 [2022-07-12 10:18:01,058 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 43752 transitions. [2022-07-12 10:18:01,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 43752 transitions. [2022-07-12 10:18:01,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:01,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 43752 transitions. [2022-07-12 10:18:01,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 634.0869565217391) internal successors, (43752), 69 states have internal predecessors, (43752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,130 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 799.0) internal successors, (55930), 70 states have internal predecessors, (55930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,130 INFO L186 Difference]: Start difference. First operand has 779 places, 695 transitions, 1872 flow. Second operand 69 states and 43752 transitions. [2022-07-12 10:18:01,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 744 transitions, 2542 flow [2022-07-12 10:18:01,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 744 transitions, 2357 flow, removed 17 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:01,141 INFO L242 Difference]: Finished difference. Result has 801 places, 703 transitions, 1999 flow [2022-07-12 10:18:01,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=799, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1999, PETRI_PLACES=801, PETRI_TRANSITIONS=703} [2022-07-12 10:18:01,142 INFO L279 CegarLoopForPetriNet]: 708 programPoint places, 93 predicate places. [2022-07-12 10:18:01,142 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 703 transitions, 1999 flow [2022-07-12 10:18:01,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 634.8939393939394) internal successors, (41903), 66 states have internal predecessors, (41903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:01,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:01,146 INFO L200 CegarLoopForPetriNet]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:01,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-12 10:18:01,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-07-12 10:18:01,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash -153682008, now seen corresponding path program 1 times [2022-07-12 10:18:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:01,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981308740] [2022-07-12 10:18:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:01,384 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:01,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:01,448 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:01,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:01,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:01,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-07-12 10:18:01,449 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:01,449 WARN L231 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:01,449 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2022-07-12 10:18:01,499 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:01,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 737 places, 832 transitions, 2285 flow [2022-07-12 10:18:02,076 INFO L129 PetriNetUnfolder]: 234/1724 cut-off events. [2022-07-12 10:18:02,076 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-12 10:18:02,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2070 conditions, 1724 events. 234/1724 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6575 event pairs, 0 based on Foata normal form. 0/1442 useless extension candidates. Maximal degree in co-relation 1944. Up to 48 conditions per place. [2022-07-12 10:18:02,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 737 places, 832 transitions, 2285 flow [2022-07-12 10:18:02,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 737 places, 832 transitions, 2285 flow [2022-07-12 10:18:02,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:02,173 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:18:02,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:02,178 INFO L129 PetriNetUnfolder]: 4/90 cut-off events. [2022-07-12 10:18:02,178 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:02,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:02,178 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] [2022-07-12 10:18:02,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1235462759, now seen corresponding path program 1 times [2022-07-12 10:18:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937322405] [2022-07-12 10:18:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:02,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:02,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937322405] [2022-07-12 10:18:02,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937322405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:02,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:02,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227755773] [2022-07-12 10:18:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:02,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 659 out of 832 [2022-07-12 10:18:02,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 832 transitions, 2285 flow. Second operand has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:02,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:02,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 659 of 832 [2022-07-12 10:18:02,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:02,757 INFO L129 PetriNetUnfolder]: 0/1441 cut-off events. [2022-07-12 10:18:02,757 INFO L130 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2022-07-12 10:18:02,757 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 1441 events. 0/1441 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6055 event pairs, 0 based on Foata normal form. 9109/10504 useless extension candidates. Maximal degree in co-relation 0. Up to 138 conditions per place. [2022-07-12 10:18:02,759 INFO L132 encePairwiseOnDemand]: 687/832 looper letters, 32 selfloop transitions, 2 changer transitions 12/693 dead transitions. [2022-07-12 10:18:02,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 693 transitions, 2075 flow [2022-07-12 10:18:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2161 transitions. [2022-07-12 10:18:02,761 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8657852564102564 [2022-07-12 10:18:02,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2161 transitions. [2022-07-12 10:18:02,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2161 transitions. [2022-07-12 10:18:02,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:02,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2161 transitions. [2022-07-12 10:18:02,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 720.3333333333334) internal successors, (2161), 3 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:02,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:02,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:02,764 INFO L186 Difference]: Start difference. First operand has 737 places, 832 transitions, 2285 flow. Second operand 3 states and 2161 transitions. [2022-07-12 10:18:02,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 693 transitions, 2075 flow [2022-07-12 10:18:02,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 693 transitions, 1569 flow, removed 253 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:02,773 INFO L242 Difference]: Finished difference. Result has 739 places, 678 transitions, 1481 flow [2022-07-12 10:18:02,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1481, PETRI_PLACES=739, PETRI_TRANSITIONS=678} [2022-07-12 10:18:02,774 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 2 predicate places. [2022-07-12 10:18:02,774 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 678 transitions, 1481 flow [2022-07-12 10:18:02,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 660.0) internal successors, (1980), 3 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:02,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:02,774 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] [2022-07-12 10:18:02,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-07-12 10:18:02,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1295833056, now seen corresponding path program 1 times [2022-07-12 10:18:02,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:02,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125786067] [2022-07-12 10:18:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:02,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:02,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:02,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125786067] [2022-07-12 10:18:02,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125786067] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:02,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540667406] [2022-07-12 10:18:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:02,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:02,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:02,808 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:02,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-12 10:18:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:03,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:03,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:03,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540667406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:03,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:03,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476311768] [2022-07-12 10:18:03,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:03,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:03,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:03,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-12 10:18:03,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 678 transitions, 1481 flow. Second operand has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:03,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-12 10:18:03,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:03,843 INFO L129 PetriNetUnfolder]: 0/1139 cut-off events. [2022-07-12 10:18:03,843 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-07-12 10:18:03,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1139 events. 0/1139 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3924 event pairs, 0 based on Foata normal form. 2/1141 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-12 10:18:03,846 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 33 selfloop transitions, 9 changer transitions 0/688 dead transitions. [2022-07-12 10:18:03,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 688 transitions, 1587 flow [2022-07-12 10:18:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 5966 transitions. [2022-07-12 10:18:03,849 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7967414529914529 [2022-07-12 10:18:03,849 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 5966 transitions. [2022-07-12 10:18:03,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 5966 transitions. [2022-07-12 10:18:03,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:03,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 5966 transitions. [2022-07-12 10:18:03,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 662.8888888888889) internal successors, (5966), 9 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,858 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 832.0) internal successors, (8320), 10 states have internal predecessors, (8320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,859 INFO L186 Difference]: Start difference. First operand has 739 places, 678 transitions, 1481 flow. Second operand 9 states and 5966 transitions. [2022-07-12 10:18:03,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 688 transitions, 1587 flow [2022-07-12 10:18:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 688 transitions, 1585 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:03,866 INFO L242 Difference]: Finished difference. Result has 737 places, 684 transitions, 1529 flow [2022-07-12 10:18:03,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=726, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1529, PETRI_PLACES=737, PETRI_TRANSITIONS=684} [2022-07-12 10:18:03,867 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 0 predicate places. [2022-07-12 10:18:03,867 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 684 transitions, 1529 flow [2022-07-12 10:18:03,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 660.3) internal successors, (6603), 10 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:03,867 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:03,868 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] [2022-07-12 10:18:03,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-12 10:18:04,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-07-12 10:18:04,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:04,069 INFO L85 PathProgramCache]: Analyzing trace with hash -766795499, now seen corresponding path program 1 times [2022-07-12 10:18:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:04,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662706762] [2022-07-12 10:18:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:04,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:04,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662706762] [2022-07-12 10:18:04,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662706762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:04,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814856932] [2022-07-12 10:18:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:04,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:04,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:04,116 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:04,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-12 10:18:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:04,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:04,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:04,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814856932] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:04,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:04,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469336899] [2022-07-12 10:18:04,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:04,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:04,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:04,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:04,697 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-12 10:18:04,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 684 transitions, 1529 flow. Second operand has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:04,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:04,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-12 10:18:04,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:05,300 INFO L129 PetriNetUnfolder]: 0/1087 cut-off events. [2022-07-12 10:18:05,300 INFO L130 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2022-07-12 10:18:05,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 1087 events. 0/1087 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3570 event pairs, 0 based on Foata normal form. 4/1091 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-12 10:18:05,302 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 41 selfloop transitions, 21 changer transitions 0/708 dead transitions. [2022-07-12 10:18:05,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 708 transitions, 1761 flow [2022-07-12 10:18:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 13884 transitions. [2022-07-12 10:18:05,308 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2022-07-12 10:18:05,308 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 13884 transitions. [2022-07-12 10:18:05,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 13884 transitions. [2022-07-12 10:18:05,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:05,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 13884 transitions. [2022-07-12 10:18:05,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 661.1428571428571) internal successors, (13884), 21 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,327 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 832.0) internal successors, (18304), 22 states have internal predecessors, (18304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,327 INFO L186 Difference]: Start difference. First operand has 737 places, 684 transitions, 1529 flow. Second operand 21 states and 13884 transitions. [2022-07-12 10:18:05,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 708 transitions, 1761 flow [2022-07-12 10:18:05,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 708 transitions, 1747 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:05,336 INFO L242 Difference]: Finished difference. Result has 761 places, 697 transitions, 1653 flow [2022-07-12 10:18:05,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1653, PETRI_PLACES=761, PETRI_TRANSITIONS=697} [2022-07-12 10:18:05,337 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 24 predicate places. [2022-07-12 10:18:05,337 INFO L495 AbstractCegarLoop]: Abstraction has has 761 places, 697 transitions, 1653 flow [2022-07-12 10:18:05,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 660.6111111111111) internal successors, (11891), 18 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:05,338 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:05,338 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:05,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-12 10:18:05,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:05,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:05,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 599763339, now seen corresponding path program 1 times [2022-07-12 10:18:05,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813057823] [2022-07-12 10:18:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:05,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:05,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:05,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813057823] [2022-07-12 10:18:05,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813057823] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:05,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183248987] [2022-07-12 10:18:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:05,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:05,644 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-12 10:18:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:06,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:06,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:06,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183248987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:06,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:06,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:06,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442658678] [2022-07-12 10:18:06,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:06,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:06,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:06,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-12 10:18:06,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 761 places, 697 transitions, 1653 flow. Second operand has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:06,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:06,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-12 10:18:06,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:07,323 INFO L129 PetriNetUnfolder]: 0/983 cut-off events. [2022-07-12 10:18:07,323 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-12 10:18:07,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 983 events. 0/983 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2895 event pairs, 0 based on Foata normal form. 8/991 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-07-12 10:18:07,325 INFO L132 encePairwiseOnDemand]: 826/832 looper letters, 57 selfloop transitions, 45 changer transitions 0/748 dead transitions. [2022-07-12 10:18:07,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 748 transitions, 2173 flow [2022-07-12 10:18:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 29720 transitions. [2022-07-12 10:18:07,399 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7938034188034188 [2022-07-12 10:18:07,399 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 29720 transitions. [2022-07-12 10:18:07,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 29720 transitions. [2022-07-12 10:18:07,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:07,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 29720 transitions. [2022-07-12 10:18:07,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 660.4444444444445) internal successors, (29720), 45 states have internal predecessors, (29720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,445 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 832.0) internal successors, (38272), 46 states have internal predecessors, (38272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,446 INFO L186 Difference]: Start difference. First operand has 761 places, 697 transitions, 1653 flow. Second operand 45 states and 29720 transitions. [2022-07-12 10:18:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 748 transitions, 2173 flow [2022-07-12 10:18:07,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 799 places, 748 transitions, 2133 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:07,455 INFO L242 Difference]: Finished difference. Result has 808 places, 722 transitions, 1931 flow [2022-07-12 10:18:07,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1931, PETRI_PLACES=808, PETRI_TRANSITIONS=722} [2022-07-12 10:18:07,456 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 71 predicate places. [2022-07-12 10:18:07,456 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 722 transitions, 1931 flow [2022-07-12 10:18:07,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 660.7941176470588) internal successors, (22467), 34 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:07,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:07,458 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:07,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-12 10:18:07,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-07-12 10:18:07,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:07,660 INFO L85 PathProgramCache]: Analyzing trace with hash 360184487, now seen corresponding path program 1 times [2022-07-12 10:18:07,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:07,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547389375] [2022-07-12 10:18:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:07,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:08,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547389375] [2022-07-12 10:18:08,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547389375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650161191] [2022-07-12 10:18:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:08,023 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:08,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-12 10:18:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:08,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:09,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650161191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:09,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:09,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:09,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397690598] [2022-07-12 10:18:09,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:09,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:09,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:09,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:09,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 658 out of 832 [2022-07-12 10:18:09,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 722 transitions, 1931 flow. Second operand has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:09,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:09,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 658 of 832 [2022-07-12 10:18:09,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:10,717 INFO L129 PetriNetUnfolder]: 0/866 cut-off events. [2022-07-12 10:18:10,717 INFO L130 PetriNetUnfolder]: For 1256/1256 co-relation queries the response was YES. [2022-07-12 10:18:10,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 866 events. 0/866 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2149 event pairs, 0 based on Foata normal form. 9/875 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-12 10:18:10,719 INFO L132 encePairwiseOnDemand]: 827/832 looper letters, 72 selfloop transitions, 70 changer transitions 0/776 dead transitions. [2022-07-12 10:18:10,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 776 transitions, 2657 flow [2022-07-12 10:18:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-12 10:18:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-12 10:18:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 47527 transitions. [2022-07-12 10:18:10,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7933860844017094 [2022-07-12 10:18:10,739 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 47527 transitions. [2022-07-12 10:18:10,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 47527 transitions. [2022-07-12 10:18:10,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:10,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 47527 transitions. [2022-07-12 10:18:10,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 660.0972222222222) internal successors, (47527), 72 states have internal predecessors, (47527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:10,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:10,817 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 832.0) internal successors, (60736), 73 states have internal predecessors, (60736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:10,818 INFO L186 Difference]: Start difference. First operand has 808 places, 722 transitions, 1931 flow. Second operand 72 states and 47527 transitions. [2022-07-12 10:18:10,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 776 transitions, 2657 flow [2022-07-12 10:18:10,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 776 transitions, 2464 flow, removed 18 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:10,834 INFO L242 Difference]: Finished difference. Result has 833 places, 733 transitions, 2087 flow [2022-07-12 10:18:10,835 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2087, PETRI_PLACES=833, PETRI_TRANSITIONS=733} [2022-07-12 10:18:10,835 INFO L279 CegarLoopForPetriNet]: 737 programPoint places, 96 predicate places. [2022-07-12 10:18:10,835 INFO L495 AbstractCegarLoop]: Abstraction has has 833 places, 733 transitions, 2087 flow [2022-07-12 10:18:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 660.8939393939394) internal successors, (43619), 66 states have internal predecessors, (43619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:10,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:10,841 INFO L200 CegarLoopForPetriNet]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:10,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:11,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -134735529, now seen corresponding path program 1 times [2022-07-12 10:18:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790732970] [2022-07-12 10:18:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:11,100 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:11,160 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:11,160 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:11,161 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:11,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-07-12 10:18:11,161 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:11,161 WARN L231 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:11,161 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2022-07-12 10:18:11,228 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:11,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 766 places, 865 transitions, 2402 flow [2022-07-12 10:18:11,838 INFO L129 PetriNetUnfolder]: 244/1796 cut-off events. [2022-07-12 10:18:11,838 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-12 10:18:11,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 1796 events. 244/1796 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6875 event pairs, 0 based on Foata normal form. 0/1502 useless extension candidates. Maximal degree in co-relation 2042. Up to 50 conditions per place. [2022-07-12 10:18:11,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 766 places, 865 transitions, 2402 flow [2022-07-12 10:18:11,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 766 places, 865 transitions, 2402 flow [2022-07-12 10:18:11,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:11,945 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:18:11,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:11,950 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-12 10:18:11,950 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:11,950 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:11,950 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] [2022-07-12 10:18:11,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1513814343, now seen corresponding path program 1 times [2022-07-12 10:18:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898999049] [2022-07-12 10:18:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:11,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:11,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898999049] [2022-07-12 10:18:11,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898999049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:11,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702313117] [2022-07-12 10:18:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:11,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:11,976 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 685 out of 865 [2022-07-12 10:18:11,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 865 transitions, 2402 flow. Second operand has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:11,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:11,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 685 of 865 [2022-07-12 10:18:11,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:12,575 INFO L129 PetriNetUnfolder]: 0/1502 cut-off events. [2022-07-12 10:18:12,575 INFO L130 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-07-12 10:18:12,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2024 conditions, 1502 events. 0/1502 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6276 event pairs, 0 based on Foata normal form. 9937/11391 useless extension candidates. Maximal degree in co-relation 0. Up to 144 conditions per place. [2022-07-12 10:18:12,578 INFO L132 encePairwiseOnDemand]: 714/865 looper letters, 33 selfloop transitions, 2 changer transitions 12/720 dead transitions. [2022-07-12 10:18:12,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 720 transitions, 2182 flow [2022-07-12 10:18:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2246 transitions. [2022-07-12 10:18:12,580 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8655105973025048 [2022-07-12 10:18:12,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2246 transitions. [2022-07-12 10:18:12,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2246 transitions. [2022-07-12 10:18:12,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:12,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2246 transitions. [2022-07-12 10:18:12,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 748.6666666666666) internal successors, (2246), 3 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:12,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:12,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 865.0) internal successors, (3460), 4 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:12,583 INFO L186 Difference]: Start difference. First operand has 766 places, 865 transitions, 2402 flow. Second operand 3 states and 2246 transitions. [2022-07-12 10:18:12,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 720 transitions, 2182 flow [2022-07-12 10:18:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 720 transitions, 1630 flow, removed 276 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:12,594 INFO L242 Difference]: Finished difference. Result has 768 places, 705 transitions, 1540 flow [2022-07-12 10:18:12,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1540, PETRI_PLACES=768, PETRI_TRANSITIONS=705} [2022-07-12 10:18:12,595 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 2 predicate places. [2022-07-12 10:18:12,595 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 705 transitions, 1540 flow [2022-07-12 10:18:12,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 686.0) internal successors, (2058), 3 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:12,596 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:12,596 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] [2022-07-12 10:18:12,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-07-12 10:18:12,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1822420096, now seen corresponding path program 1 times [2022-07-12 10:18:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:12,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095769803] [2022-07-12 10:18:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:12,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:12,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095769803] [2022-07-12 10:18:12,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095769803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:12,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077238489] [2022-07-12 10:18:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:12,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:12,625 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:12,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-12 10:18:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:13,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:13,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:13,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:13,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077238489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:13,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:13,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:13,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806457652] [2022-07-12 10:18:13,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:13,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:13,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:13,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-12 10:18:13,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 705 transitions, 1540 flow. Second operand has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:13,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:13,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-12 10:18:13,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:13,727 INFO L129 PetriNetUnfolder]: 0/1188 cut-off events. [2022-07-12 10:18:13,727 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-12 10:18:13,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 1188 events. 0/1188 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4105 event pairs, 0 based on Foata normal form. 2/1190 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-12 10:18:13,729 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 34 selfloop transitions, 9 changer transitions 0/715 dead transitions. [2022-07-12 10:18:13,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 715 transitions, 1648 flow [2022-07-12 10:18:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6201 transitions. [2022-07-12 10:18:13,731 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7965317919075144 [2022-07-12 10:18:13,731 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6201 transitions. [2022-07-12 10:18:13,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6201 transitions. [2022-07-12 10:18:13,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:13,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6201 transitions. [2022-07-12 10:18:13,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 689.0) internal successors, (6201), 9 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:13,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:13,740 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 865.0) internal successors, (8650), 10 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:13,740 INFO L186 Difference]: Start difference. First operand has 768 places, 705 transitions, 1540 flow. Second operand 9 states and 6201 transitions. [2022-07-12 10:18:13,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 715 transitions, 1648 flow [2022-07-12 10:18:13,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 715 transitions, 1646 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:13,747 INFO L242 Difference]: Finished difference. Result has 766 places, 711 transitions, 1588 flow [2022-07-12 10:18:13,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=766, PETRI_TRANSITIONS=711} [2022-07-12 10:18:13,748 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 0 predicate places. [2022-07-12 10:18:13,748 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 711 transitions, 1588 flow [2022-07-12 10:18:13,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 686.3) internal successors, (6863), 10 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:13,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:13,749 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] [2022-07-12 10:18:13,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-12 10:18:13,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-07-12 10:18:13,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash 329246261, now seen corresponding path program 1 times [2022-07-12 10:18:13,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:13,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566966812] [2022-07-12 10:18:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:13,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566966812] [2022-07-12 10:18:13,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566966812] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:13,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789156545] [2022-07-12 10:18:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:13,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:13,995 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:14,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-12 10:18:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:14,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:14,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789156545] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:14,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:14,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:14,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206205947] [2022-07-12 10:18:14,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:14,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:14,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:14,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:14,595 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-12 10:18:14,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 711 transitions, 1588 flow. Second operand has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:14,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:14,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-12 10:18:14,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:15,239 INFO L129 PetriNetUnfolder]: 0/1136 cut-off events. [2022-07-12 10:18:15,239 INFO L130 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-07-12 10:18:15,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 1136 events. 0/1136 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3761 event pairs, 0 based on Foata normal form. 4/1140 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-12 10:18:15,242 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 42 selfloop transitions, 21 changer transitions 0/735 dead transitions. [2022-07-12 10:18:15,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 735 transitions, 1822 flow [2022-07-12 10:18:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14431 transitions. [2022-07-12 10:18:15,247 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944398568676025 [2022-07-12 10:18:15,247 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14431 transitions. [2022-07-12 10:18:15,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14431 transitions. [2022-07-12 10:18:15,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:15,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14431 transitions. [2022-07-12 10:18:15,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 687.1904761904761) internal successors, (14431), 21 states have internal predecessors, (14431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 865.0) internal successors, (19030), 22 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,266 INFO L186 Difference]: Start difference. First operand has 766 places, 711 transitions, 1588 flow. Second operand 21 states and 14431 transitions. [2022-07-12 10:18:15,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 735 transitions, 1822 flow [2022-07-12 10:18:15,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 735 transitions, 1808 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:15,276 INFO L242 Difference]: Finished difference. Result has 790 places, 724 transitions, 1712 flow [2022-07-12 10:18:15,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1712, PETRI_PLACES=790, PETRI_TRANSITIONS=724} [2022-07-12 10:18:15,277 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 24 predicate places. [2022-07-12 10:18:15,277 INFO L495 AbstractCegarLoop]: Abstraction has has 790 places, 724 transitions, 1712 flow [2022-07-12 10:18:15,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 686.6111111111111) internal successors, (12359), 18 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:15,278 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:15,278 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:15,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-12 10:18:15,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-07-12 10:18:15,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:15,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1297432149, now seen corresponding path program 1 times [2022-07-12 10:18:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:15,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344136738] [2022-07-12 10:18:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344136738] [2022-07-12 10:18:15,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344136738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019026193] [2022-07-12 10:18:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:15,587 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:15,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-12 10:18:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:16,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019026193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:16,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:16,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036247353] [2022-07-12 10:18:16,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:16,379 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-12 10:18:16,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 724 transitions, 1712 flow. Second operand has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:16,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:16,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-12 10:18:16,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:17,346 INFO L129 PetriNetUnfolder]: 0/1032 cut-off events. [2022-07-12 10:18:17,346 INFO L130 PetriNetUnfolder]: For 519/519 co-relation queries the response was YES. [2022-07-12 10:18:17,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1647 conditions, 1032 events. 0/1032 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3077 event pairs, 0 based on Foata normal form. 8/1040 useless extension candidates. Maximal degree in co-relation 0. Up to 45 conditions per place. [2022-07-12 10:18:17,349 INFO L132 encePairwiseOnDemand]: 859/865 looper letters, 58 selfloop transitions, 45 changer transitions 0/775 dead transitions. [2022-07-12 10:18:17,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 834 places, 775 transitions, 2234 flow [2022-07-12 10:18:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 30891 transitions. [2022-07-12 10:18:17,361 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7936030828516377 [2022-07-12 10:18:17,361 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 30891 transitions. [2022-07-12 10:18:17,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 30891 transitions. [2022-07-12 10:18:17,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:17,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 30891 transitions. [2022-07-12 10:18:17,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 686.4666666666667) internal successors, (30891), 45 states have internal predecessors, (30891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,496 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 865.0) internal successors, (39790), 46 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,496 INFO L186 Difference]: Start difference. First operand has 790 places, 724 transitions, 1712 flow. Second operand 45 states and 30891 transitions. [2022-07-12 10:18:17,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 834 places, 775 transitions, 2234 flow [2022-07-12 10:18:17,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 775 transitions, 2194 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:17,509 INFO L242 Difference]: Finished difference. Result has 837 places, 749 transitions, 1990 flow [2022-07-12 10:18:17,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1990, PETRI_PLACES=837, PETRI_TRANSITIONS=749} [2022-07-12 10:18:17,510 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 71 predicate places. [2022-07-12 10:18:17,510 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 749 transitions, 1990 flow [2022-07-12 10:18:17,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 686.7941176470588) internal successors, (23351), 34 states have internal predecessors, (23351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:17,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:17,514 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:17,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:17,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -622610233, now seen corresponding path program 1 times [2022-07-12 10:18:17,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072495004] [2022-07-12 10:18:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:17,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:18,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072495004] [2022-07-12 10:18:18,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072495004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597922031] [2022-07-12 10:18:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:18,068 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:18,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-12 10:18:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:18,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:19,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597922031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:19,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:19,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:19,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943110947] [2022-07-12 10:18:19,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:19,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:19,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 684 out of 865 [2022-07-12 10:18:19,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 749 transitions, 1990 flow. Second operand has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:19,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:19,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 684 of 865 [2022-07-12 10:18:19,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:21,132 INFO L129 PetriNetUnfolder]: 0/902 cut-off events. [2022-07-12 10:18:21,132 INFO L130 PetriNetUnfolder]: For 1377/1377 co-relation queries the response was YES. [2022-07-12 10:18:21,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 902 events. 0/902 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2247 event pairs, 0 based on Foata normal form. 10/912 useless extension candidates. Maximal degree in co-relation 0. Up to 44 conditions per place. [2022-07-12 10:18:21,133 INFO L132 encePairwiseOnDemand]: 860/865 looper letters, 75 selfloop transitions, 73 changer transitions 0/808 dead transitions. [2022-07-12 10:18:21,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 808 transitions, 2772 flow [2022-07-12 10:18:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 10:18:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-12 10:18:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 51458 transitions. [2022-07-12 10:18:21,156 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931868978805395 [2022-07-12 10:18:21,157 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 51458 transitions. [2022-07-12 10:18:21,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 51458 transitions. [2022-07-12 10:18:21,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:21,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 51458 transitions. [2022-07-12 10:18:21,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 686.1066666666667) internal successors, (51458), 75 states have internal predecessors, (51458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:21,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:21,242 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 865.0) internal successors, (65740), 76 states have internal predecessors, (65740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:21,242 INFO L186 Difference]: Start difference. First operand has 837 places, 749 transitions, 1990 flow. Second operand 75 states and 51458 transitions. [2022-07-12 10:18:21,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 808 transitions, 2772 flow [2022-07-12 10:18:21,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 865 places, 808 transitions, 2571 flow, removed 19 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:21,254 INFO L242 Difference]: Finished difference. Result has 865 places, 763 transitions, 2175 flow [2022-07-12 10:18:21,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=865, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=2175, PETRI_PLACES=865, PETRI_TRANSITIONS=763} [2022-07-12 10:18:21,255 INFO L279 CegarLoopForPetriNet]: 766 programPoint places, 99 predicate places. [2022-07-12 10:18:21,255 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 763 transitions, 2175 flow [2022-07-12 10:18:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 686.8939393939394) internal successors, (45335), 66 states have internal predecessors, (45335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:21,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:21,259 INFO L200 CegarLoopForPetriNet]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:21,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-07-12 10:18:21,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:21,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash -762434393, now seen corresponding path program 1 times [2022-07-12 10:18:21,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154395818] [2022-07-12 10:18:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:21,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:21,495 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:21,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:21,557 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:21,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:21,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:21,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-07-12 10:18:21,558 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:21,558 WARN L231 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:21,558 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2022-07-12 10:18:21,608 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:21,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 795 places, 898 transitions, 2521 flow [2022-07-12 10:18:22,167 INFO L129 PetriNetUnfolder]: 254/1868 cut-off events. [2022-07-12 10:18:22,168 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-12 10:18:22,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 1868 events. 254/1868 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7144 event pairs, 0 based on Foata normal form. 0/1562 useless extension candidates. Maximal degree in co-relation 2141. Up to 52 conditions per place. [2022-07-12 10:18:22,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 898 transitions, 2521 flow [2022-07-12 10:18:22,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 795 places, 898 transitions, 2521 flow [2022-07-12 10:18:22,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:22,450 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:18:22,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:22,454 INFO L129 PetriNetUnfolder]: 4/89 cut-off events. [2022-07-12 10:18:22,454 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:22,455 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:22,455 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] [2022-07-12 10:18:22,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash -764264697, now seen corresponding path program 1 times [2022-07-12 10:18:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692320166] [2022-07-12 10:18:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:22,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:22,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692320166] [2022-07-12 10:18:22,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692320166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:22,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:22,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:22,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580481994] [2022-07-12 10:18:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:22,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:22,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:22,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:22,476 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 711 out of 898 [2022-07-12 10:18:22,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 898 transitions, 2521 flow. Second operand has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:22,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:22,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 711 of 898 [2022-07-12 10:18:22,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:23,086 INFO L129 PetriNetUnfolder]: 0/1563 cut-off events. [2022-07-12 10:18:23,086 INFO L130 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2022-07-12 10:18:23,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 1563 events. 0/1563 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6564 event pairs, 0 based on Foata normal form. 10799/12312 useless extension candidates. Maximal degree in co-relation 0. Up to 150 conditions per place. [2022-07-12 10:18:23,089 INFO L132 encePairwiseOnDemand]: 741/898 looper letters, 34 selfloop transitions, 2 changer transitions 12/747 dead transitions. [2022-07-12 10:18:23,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 747 transitions, 2291 flow [2022-07-12 10:18:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2331 transitions. [2022-07-12 10:18:23,090 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8652561247216035 [2022-07-12 10:18:23,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2331 transitions. [2022-07-12 10:18:23,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2331 transitions. [2022-07-12 10:18:23,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:23,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2331 transitions. [2022-07-12 10:18:23,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 777.0) internal successors, (2331), 3 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:23,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:23,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 898.0) internal successors, (3592), 4 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:23,094 INFO L186 Difference]: Start difference. First operand has 795 places, 898 transitions, 2521 flow. Second operand 3 states and 2331 transitions. [2022-07-12 10:18:23,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 747 transitions, 2291 flow [2022-07-12 10:18:23,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 747 transitions, 1691 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:23,104 INFO L242 Difference]: Finished difference. Result has 797 places, 732 transitions, 1599 flow [2022-07-12 10:18:23,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1599, PETRI_PLACES=797, PETRI_TRANSITIONS=732} [2022-07-12 10:18:23,105 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 2 predicate places. [2022-07-12 10:18:23,105 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 732 transitions, 1599 flow [2022-07-12 10:18:23,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 712.0) internal successors, (2136), 3 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:23,105 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:23,105 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] [2022-07-12 10:18:23,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-07-12 10:18:23,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1670188384, now seen corresponding path program 1 times [2022-07-12 10:18:23,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:23,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088199406] [2022-07-12 10:18:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:23,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088199406] [2022-07-12 10:18:23,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088199406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:23,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136761816] [2022-07-12 10:18:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:23,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:23,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:23,132 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:23,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-12 10:18:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:23,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:23,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:23,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136761816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:23,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:23,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797469205] [2022-07-12 10:18:23,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:23,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:23,672 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-12 10:18:23,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 732 transitions, 1599 flow. Second operand has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:23,674 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:23,674 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-12 10:18:23,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:24,230 INFO L129 PetriNetUnfolder]: 0/1237 cut-off events. [2022-07-12 10:18:24,230 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-07-12 10:18:24,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 1237 events. 0/1237 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4282 event pairs, 0 based on Foata normal form. 2/1239 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-12 10:18:24,232 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 35 selfloop transitions, 9 changer transitions 0/742 dead transitions. [2022-07-12 10:18:24,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 742 transitions, 1709 flow [2022-07-12 10:18:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6436 transitions. [2022-07-12 10:18:24,235 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7963375402128187 [2022-07-12 10:18:24,235 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6436 transitions. [2022-07-12 10:18:24,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6436 transitions. [2022-07-12 10:18:24,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:24,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6436 transitions. [2022-07-12 10:18:24,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 715.1111111111111) internal successors, (6436), 9 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:24,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:24,243 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 898.0) internal successors, (8980), 10 states have internal predecessors, (8980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:24,243 INFO L186 Difference]: Start difference. First operand has 797 places, 732 transitions, 1599 flow. Second operand 9 states and 6436 transitions. [2022-07-12 10:18:24,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 742 transitions, 1709 flow [2022-07-12 10:18:24,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 742 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:24,251 INFO L242 Difference]: Finished difference. Result has 795 places, 738 transitions, 1647 flow [2022-07-12 10:18:24,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=784, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1647, PETRI_PLACES=795, PETRI_TRANSITIONS=738} [2022-07-12 10:18:24,251 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 0 predicate places. [2022-07-12 10:18:24,252 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 738 transitions, 1647 flow [2022-07-12 10:18:24,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 712.3) internal successors, (7123), 10 states have internal predecessors, (7123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:24,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:24,252 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] [2022-07-12 10:18:24,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-12 10:18:24,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:24,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash -707309547, now seen corresponding path program 1 times [2022-07-12 10:18:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:24,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388679367] [2022-07-12 10:18:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:24,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:24,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388679367] [2022-07-12 10:18:24,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388679367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:24,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981897608] [2022-07-12 10:18:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:24,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:24,498 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-12 10:18:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:25,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:25,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981897608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:25,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:25,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823710453] [2022-07-12 10:18:25,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:25,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:25,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:25,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-12 10:18:25,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 738 transitions, 1647 flow. Second operand has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:25,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-12 10:18:25,126 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:25,774 INFO L129 PetriNetUnfolder]: 0/1185 cut-off events. [2022-07-12 10:18:25,774 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2022-07-12 10:18:25,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1697 conditions, 1185 events. 0/1185 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3945 event pairs, 0 based on Foata normal form. 4/1189 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-07-12 10:18:25,776 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 43 selfloop transitions, 21 changer transitions 0/762 dead transitions. [2022-07-12 10:18:25,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 762 transitions, 1883 flow [2022-07-12 10:18:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 14978 transitions. [2022-07-12 10:18:25,782 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7942517764344045 [2022-07-12 10:18:25,782 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 14978 transitions. [2022-07-12 10:18:25,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 14978 transitions. [2022-07-12 10:18:25,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:25,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 14978 transitions. [2022-07-12 10:18:25,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 713.2380952380952) internal successors, (14978), 21 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,802 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 898.0) internal successors, (19756), 22 states have internal predecessors, (19756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,802 INFO L186 Difference]: Start difference. First operand has 795 places, 738 transitions, 1647 flow. Second operand 21 states and 14978 transitions. [2022-07-12 10:18:25,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 762 transitions, 1883 flow [2022-07-12 10:18:25,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 762 transitions, 1869 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:25,811 INFO L242 Difference]: Finished difference. Result has 819 places, 751 transitions, 1771 flow [2022-07-12 10:18:25,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1771, PETRI_PLACES=819, PETRI_TRANSITIONS=751} [2022-07-12 10:18:25,812 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 24 predicate places. [2022-07-12 10:18:25,812 INFO L495 AbstractCegarLoop]: Abstraction has has 819 places, 751 transitions, 1771 flow [2022-07-12 10:18:25,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 712.6111111111111) internal successors, (12827), 18 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:25,813 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:25,813 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:25,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-07-12 10:18:26,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-07-12 10:18:26,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:26,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1350000373, now seen corresponding path program 1 times [2022-07-12 10:18:26,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:26,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278078074] [2022-07-12 10:18:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:26,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:26,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278078074] [2022-07-12 10:18:26,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278078074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:26,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519492308] [2022-07-12 10:18:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:26,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:26,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:26,120 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:26,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-12 10:18:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:26,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:26,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:26,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519492308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:26,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:26,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:26,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791235754] [2022-07-12 10:18:26,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:26,937 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-12 10:18:26,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 751 transitions, 1771 flow. Second operand has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:26,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:26,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-12 10:18:26,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:27,925 INFO L129 PetriNetUnfolder]: 0/1081 cut-off events. [2022-07-12 10:18:27,925 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-12 10:18:27,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 1081 events. 0/1081 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3256 event pairs, 0 based on Foata normal form. 8/1089 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-07-12 10:18:27,928 INFO L132 encePairwiseOnDemand]: 892/898 looper letters, 59 selfloop transitions, 45 changer transitions 0/802 dead transitions. [2022-07-12 10:18:27,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 802 transitions, 2295 flow [2022-07-12 10:18:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 32062 transitions. [2022-07-12 10:18:27,941 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934174709230388 [2022-07-12 10:18:27,941 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 32062 transitions. [2022-07-12 10:18:27,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 32062 transitions. [2022-07-12 10:18:27,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:27,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 32062 transitions. [2022-07-12 10:18:27,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 712.4888888888889) internal successors, (32062), 45 states have internal predecessors, (32062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,991 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 898.0) internal successors, (41308), 46 states have internal predecessors, (41308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:27,991 INFO L186 Difference]: Start difference. First operand has 819 places, 751 transitions, 1771 flow. Second operand 45 states and 32062 transitions. [2022-07-12 10:18:27,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 802 transitions, 2295 flow [2022-07-12 10:18:28,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 802 transitions, 2255 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:28,008 INFO L242 Difference]: Finished difference. Result has 866 places, 776 transitions, 2049 flow [2022-07-12 10:18:28,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2049, PETRI_PLACES=866, PETRI_TRANSITIONS=776} [2022-07-12 10:18:28,008 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 71 predicate places. [2022-07-12 10:18:28,009 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 776 transitions, 2049 flow [2022-07-12 10:18:28,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 712.7941176470588) internal successors, (24235), 34 states have internal predecessors, (24235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:28,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:28,012 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:28,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:28,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:28,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash 667157287, now seen corresponding path program 1 times [2022-07-12 10:18:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:28,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316135707] [2022-07-12 10:18:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316135707] [2022-07-12 10:18:28,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316135707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:28,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976010717] [2022-07-12 10:18:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:28,542 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:28,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-12 10:18:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:29,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:29,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:29,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976010717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:29,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:29,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684449237] [2022-07-12 10:18:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:29,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:29,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:29,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 710 out of 898 [2022-07-12 10:18:29,998 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 866 places, 776 transitions, 2049 flow. Second operand has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:29,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:29,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 710 of 898 [2022-07-12 10:18:29,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:31,561 INFO L129 PetriNetUnfolder]: 0/938 cut-off events. [2022-07-12 10:18:31,561 INFO L130 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-07-12 10:18:31,561 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 938 events. 0/938 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2345 event pairs, 0 based on Foata normal form. 11/949 useless extension candidates. Maximal degree in co-relation 0. Up to 46 conditions per place. [2022-07-12 10:18:31,563 INFO L132 encePairwiseOnDemand]: 893/898 looper letters, 78 selfloop transitions, 76 changer transitions 0/840 dead transitions. [2022-07-12 10:18:31,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 840 transitions, 2887 flow [2022-07-12 10:18:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-12 10:18:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-12 10:18:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 55545 transitions. [2022-07-12 10:18:31,582 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930015418879561 [2022-07-12 10:18:31,582 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 55545 transitions. [2022-07-12 10:18:31,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 55545 transitions. [2022-07-12 10:18:31,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:31,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 55545 transitions. [2022-07-12 10:18:31,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 712.1153846153846) internal successors, (55545), 78 states have internal predecessors, (55545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:31,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:31,666 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 898.0) internal successors, (70942), 79 states have internal predecessors, (70942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:31,667 INFO L186 Difference]: Start difference. First operand has 866 places, 776 transitions, 2049 flow. Second operand 78 states and 55545 transitions. [2022-07-12 10:18:31,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 840 transitions, 2887 flow [2022-07-12 10:18:31,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 897 places, 840 transitions, 2678 flow, removed 20 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:31,679 INFO L242 Difference]: Finished difference. Result has 897 places, 793 transitions, 2263 flow [2022-07-12 10:18:31,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=898, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=2263, PETRI_PLACES=897, PETRI_TRANSITIONS=793} [2022-07-12 10:18:31,680 INFO L279 CegarLoopForPetriNet]: 795 programPoint places, 102 predicate places. [2022-07-12 10:18:31,680 INFO L495 AbstractCegarLoop]: Abstraction has has 897 places, 793 transitions, 2263 flow [2022-07-12 10:18:31,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 712.8939393939394) internal successors, (47051), 66 states have internal predecessors, (47051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:31,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:31,686 INFO L200 CegarLoopForPetriNet]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:31,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:31,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:31,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash 271882808, now seen corresponding path program 1 times [2022-07-12 10:18:31,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:31,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972358838] [2022-07-12 10:18:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:31,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:31,939 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:31,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:31,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:31,998 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:31,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:31,999 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-07-12 10:18:31,999 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:31,999 WARN L231 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:31,999 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2022-07-12 10:18:32,045 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:32,050 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 824 places, 931 transitions, 2642 flow [2022-07-12 10:18:32,632 INFO L129 PetriNetUnfolder]: 264/1940 cut-off events. [2022-07-12 10:18:32,632 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-12 10:18:32,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2370 conditions, 1940 events. 264/1940 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7312 event pairs, 0 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 2241. Up to 54 conditions per place. [2022-07-12 10:18:32,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 824 places, 931 transitions, 2642 flow [2022-07-12 10:18:32,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 824 places, 931 transitions, 2642 flow [2022-07-12 10:18:32,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:32,820 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:18:32,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:32,824 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-12 10:18:32,824 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:32,824 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:32,824 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] [2022-07-12 10:18:32,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807065, now seen corresponding path program 1 times [2022-07-12 10:18:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:32,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999310242] [2022-07-12 10:18:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:32,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:32,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999310242] [2022-07-12 10:18:32,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999310242] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:32,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:32,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:32,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276975400] [2022-07-12 10:18:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:32,844 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 737 out of 931 [2022-07-12 10:18:32,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 931 transitions, 2642 flow. Second operand has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:32,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:32,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 737 of 931 [2022-07-12 10:18:32,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:33,579 INFO L129 PetriNetUnfolder]: 0/1624 cut-off events. [2022-07-12 10:18:33,579 INFO L130 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2022-07-12 10:18:33,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 1624 events. 0/1624 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6846 event pairs, 0 based on Foata normal form. 11699/13271 useless extension candidates. Maximal degree in co-relation 0. Up to 156 conditions per place. [2022-07-12 10:18:33,581 INFO L132 encePairwiseOnDemand]: 768/931 looper letters, 35 selfloop transitions, 2 changer transitions 12/774 dead transitions. [2022-07-12 10:18:33,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 774 transitions, 2402 flow [2022-07-12 10:18:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2416 transitions. [2022-07-12 10:18:33,583 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8650196920873613 [2022-07-12 10:18:33,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2416 transitions. [2022-07-12 10:18:33,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2416 transitions. [2022-07-12 10:18:33,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:33,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2416 transitions. [2022-07-12 10:18:33,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 805.3333333333334) internal successors, (2416), 3 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 931.0) internal successors, (3724), 4 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,587 INFO L186 Difference]: Start difference. First operand has 824 places, 931 transitions, 2642 flow. Second operand 3 states and 2416 transitions. [2022-07-12 10:18:33,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 774 transitions, 2402 flow [2022-07-12 10:18:33,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 774 transitions, 1752 flow, removed 325 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:33,598 INFO L242 Difference]: Finished difference. Result has 826 places, 759 transitions, 1658 flow [2022-07-12 10:18:33,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1658, PETRI_PLACES=826, PETRI_TRANSITIONS=759} [2022-07-12 10:18:33,599 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 2 predicate places. [2022-07-12 10:18:33,599 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 759 transitions, 1658 flow [2022-07-12 10:18:33,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 738.0) internal successors, (2214), 3 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:33,599 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:33,599 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] [2022-07-12 10:18:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-07-12 10:18:33,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:33,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1752528192, now seen corresponding path program 1 times [2022-07-12 10:18:33,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:33,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319858882] [2022-07-12 10:18:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319858882] [2022-07-12 10:18:33,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319858882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506587977] [2022-07-12 10:18:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:33,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:33,632 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:33,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-12 10:18:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:34,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:34,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506587977] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:34,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:34,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:34,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602843833] [2022-07-12 10:18:34,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:34,216 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-12 10:18:34,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 759 transitions, 1658 flow. Second operand has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:34,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:34,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-12 10:18:34,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:34,905 INFO L129 PetriNetUnfolder]: 0/1286 cut-off events. [2022-07-12 10:18:34,905 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-12 10:18:34,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 1286 events. 0/1286 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4473 event pairs, 0 based on Foata normal form. 2/1288 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-12 10:18:34,908 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 36 selfloop transitions, 9 changer transitions 0/769 dead transitions. [2022-07-12 10:18:34,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 769 transitions, 1770 flow [2022-07-12 10:18:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6671 transitions. [2022-07-12 10:18:34,911 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7961570593149541 [2022-07-12 10:18:34,911 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6671 transitions. [2022-07-12 10:18:34,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6671 transitions. [2022-07-12 10:18:34,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:34,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6671 transitions. [2022-07-12 10:18:34,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 741.2222222222222) internal successors, (6671), 9 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:34,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:34,919 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 931.0) internal successors, (9310), 10 states have internal predecessors, (9310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:34,919 INFO L186 Difference]: Start difference. First operand has 826 places, 759 transitions, 1658 flow. Second operand 9 states and 6671 transitions. [2022-07-12 10:18:34,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 769 transitions, 1770 flow [2022-07-12 10:18:34,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 769 transitions, 1768 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:34,928 INFO L242 Difference]: Finished difference. Result has 824 places, 765 transitions, 1706 flow [2022-07-12 10:18:34,929 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=813, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1706, PETRI_PLACES=824, PETRI_TRANSITIONS=765} [2022-07-12 10:18:34,929 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 0 predicate places. [2022-07-12 10:18:34,929 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 765 transitions, 1706 flow [2022-07-12 10:18:34,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 738.3) internal successors, (7383), 10 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:34,930 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:34,930 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] [2022-07-12 10:18:34,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-07-12 10:18:35,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-07-12 10:18:35,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash 418504373, now seen corresponding path program 1 times [2022-07-12 10:18:35,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:35,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614270531] [2022-07-12 10:18:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614270531] [2022-07-12 10:18:35,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614270531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673924155] [2022-07-12 10:18:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:35,178 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:35,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-12 10:18:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:35,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:35,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673924155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:35,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:35,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833120496] [2022-07-12 10:18:35,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:35,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:35,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:35,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-12 10:18:35,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 765 transitions, 1706 flow. Second operand has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:35,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:35,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-12 10:18:35,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:36,583 INFO L129 PetriNetUnfolder]: 0/1234 cut-off events. [2022-07-12 10:18:36,583 INFO L130 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2022-07-12 10:18:36,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 1234 events. 0/1234 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4116 event pairs, 0 based on Foata normal form. 4/1238 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-07-12 10:18:36,586 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 44 selfloop transitions, 21 changer transitions 0/789 dead transitions. [2022-07-12 10:18:36,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 789 transitions, 1944 flow [2022-07-12 10:18:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 15525 transitions. [2022-07-12 10:18:36,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7940770293079638 [2022-07-12 10:18:36,592 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 15525 transitions. [2022-07-12 10:18:36,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 15525 transitions. [2022-07-12 10:18:36,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:36,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 15525 transitions. [2022-07-12 10:18:36,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 739.2857142857143) internal successors, (15525), 21 states have internal predecessors, (15525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:36,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:36,615 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 931.0) internal successors, (20482), 22 states have internal predecessors, (20482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:36,615 INFO L186 Difference]: Start difference. First operand has 824 places, 765 transitions, 1706 flow. Second operand 21 states and 15525 transitions. [2022-07-12 10:18:36,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 789 transitions, 1944 flow [2022-07-12 10:18:36,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1930 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:36,626 INFO L242 Difference]: Finished difference. Result has 848 places, 778 transitions, 1830 flow [2022-07-12 10:18:36,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1830, PETRI_PLACES=848, PETRI_TRANSITIONS=778} [2022-07-12 10:18:36,626 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 24 predicate places. [2022-07-12 10:18:36,626 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 778 transitions, 1830 flow [2022-07-12 10:18:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 738.6111111111111) internal successors, (13295), 18 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:36,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:36,628 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:36,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-07-12 10:18:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-07-12 10:18:36,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash 442058667, now seen corresponding path program 1 times [2022-07-12 10:18:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:36,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23808106] [2022-07-12 10:18:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:36,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23808106] [2022-07-12 10:18:36,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23808106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852477560] [2022-07-12 10:18:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:37,000 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:37,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-12 10:18:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:37,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852477560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:37,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:37,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:37,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831133240] [2022-07-12 10:18:37,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:37,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-12 10:18:37,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 778 transitions, 1830 flow. Second operand has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:37,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:37,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-12 10:18:37,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:38,968 INFO L129 PetriNetUnfolder]: 0/1130 cut-off events. [2022-07-12 10:18:38,968 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-12 10:18:38,968 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 1130 events. 0/1130 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3441 event pairs, 0 based on Foata normal form. 8/1138 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-07-12 10:18:38,970 INFO L132 encePairwiseOnDemand]: 925/931 looper letters, 60 selfloop transitions, 45 changer transitions 0/829 dead transitions. [2022-07-12 10:18:38,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 829 transitions, 2356 flow [2022-07-12 10:18:38,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 33233 transitions. [2022-07-12 10:18:38,983 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7932450173051677 [2022-07-12 10:18:38,983 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 33233 transitions. [2022-07-12 10:18:38,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 33233 transitions. [2022-07-12 10:18:38,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:38,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 33233 transitions. [2022-07-12 10:18:39,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 738.5111111111111) internal successors, (33233), 45 states have internal predecessors, (33233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,035 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 931.0) internal successors, (42826), 46 states have internal predecessors, (42826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,035 INFO L186 Difference]: Start difference. First operand has 848 places, 778 transitions, 1830 flow. Second operand 45 states and 33233 transitions. [2022-07-12 10:18:39,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 829 transitions, 2356 flow [2022-07-12 10:18:39,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 829 transitions, 2316 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:39,047 INFO L242 Difference]: Finished difference. Result has 895 places, 803 transitions, 2108 flow [2022-07-12 10:18:39,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2108, PETRI_PLACES=895, PETRI_TRANSITIONS=803} [2022-07-12 10:18:39,048 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 71 predicate places. [2022-07-12 10:18:39,048 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 803 transitions, 2108 flow [2022-07-12 10:18:39,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 738.7941176470588) internal successors, (25119), 34 states have internal predecessors, (25119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:39,050 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:39,050 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:39,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-12 10:18:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:39,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:39,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash -65480249, now seen corresponding path program 1 times [2022-07-12 10:18:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:39,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891416089] [2022-07-12 10:18:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:39,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:39,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891416089] [2022-07-12 10:18:39,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891416089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:39,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052352871] [2022-07-12 10:18:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:39,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:39,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:39,584 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:39,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-12 10:18:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:40,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:41,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052352871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:41,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:41,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:41,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029488788] [2022-07-12 10:18:41,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:41,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:41,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 736 out of 931 [2022-07-12 10:18:41,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 803 transitions, 2108 flow. Second operand has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:41,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:41,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 736 of 931 [2022-07-12 10:18:41,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:42,814 INFO L129 PetriNetUnfolder]: 0/974 cut-off events. [2022-07-12 10:18:42,814 INFO L130 PetriNetUnfolder]: For 1619/1619 co-relation queries the response was YES. [2022-07-12 10:18:42,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 974 events. 0/974 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2443 event pairs, 0 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-07-12 10:18:42,815 INFO L132 encePairwiseOnDemand]: 926/931 looper letters, 81 selfloop transitions, 79 changer transitions 0/872 dead transitions. [2022-07-12 10:18:42,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 872 transitions, 3002 flow [2022-07-12 10:18:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 10:18:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-12 10:18:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 59788 transitions. [2022-07-12 10:18:42,836 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928286324276299 [2022-07-12 10:18:42,836 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 59788 transitions. [2022-07-12 10:18:42,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 59788 transitions. [2022-07-12 10:18:42,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:42,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 59788 transitions. [2022-07-12 10:18:42,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 738.1234567901234) internal successors, (59788), 81 states have internal predecessors, (59788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,931 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 931.0) internal successors, (76342), 82 states have internal predecessors, (76342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,931 INFO L186 Difference]: Start difference. First operand has 895 places, 803 transitions, 2108 flow. Second operand 81 states and 59788 transitions. [2022-07-12 10:18:42,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 872 transitions, 3002 flow [2022-07-12 10:18:42,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 872 transitions, 2785 flow, removed 21 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:42,944 INFO L242 Difference]: Finished difference. Result has 929 places, 823 transitions, 2351 flow [2022-07-12 10:18:42,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=931, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2351, PETRI_PLACES=929, PETRI_TRANSITIONS=823} [2022-07-12 10:18:42,945 INFO L279 CegarLoopForPetriNet]: 824 programPoint places, 105 predicate places. [2022-07-12 10:18:42,945 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 823 transitions, 2351 flow [2022-07-12 10:18:42,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 738.8939393939394) internal successors, (48767), 66 states have internal predecessors, (48767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:42,952 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:42,952 INFO L200 CegarLoopForPetriNet]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:42,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:43,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:43,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -150822230, now seen corresponding path program 1 times [2022-07-12 10:18:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617898359] [2022-07-12 10:18:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:43,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:43,201 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:43,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:43,262 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:43,262 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:43,262 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:43,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-07-12 10:18:43,262 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:18:43,263 WARN L231 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:43,263 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2022-07-12 10:18:43,312 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:43,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 853 places, 964 transitions, 2765 flow [2022-07-12 10:18:43,959 INFO L129 PetriNetUnfolder]: 274/2012 cut-off events. [2022-07-12 10:18:43,959 INFO L130 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2022-07-12 10:18:44,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 2012 events. 274/2012 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7658 event pairs, 0 based on Foata normal form. 0/1682 useless extension candidates. Maximal degree in co-relation 2342. Up to 56 conditions per place. [2022-07-12 10:18:44,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 853 places, 964 transitions, 2765 flow [2022-07-12 10:18:44,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 853 places, 964 transitions, 2765 flow [2022-07-12 10:18:44,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:44,168 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:18:44,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:44,171 INFO L129 PetriNetUnfolder]: 5/92 cut-off events. [2022-07-12 10:18:44,171 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:44,172 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:44,172 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] [2022-07-12 10:18:44,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 188590246, now seen corresponding path program 1 times [2022-07-12 10:18:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813316366] [2022-07-12 10:18:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813316366] [2022-07-12 10:18:44,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813316366] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:44,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:44,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:18:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715634764] [2022-07-12 10:18:44,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:18:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:18:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:18:44,191 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 770 out of 964 [2022-07-12 10:18:44,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 964 transitions, 2765 flow. Second operand has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:44,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:44,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 770 of 964 [2022-07-12 10:18:44,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:44,910 INFO L129 PetriNetUnfolder]: 0/1710 cut-off events. [2022-07-12 10:18:44,910 INFO L130 PetriNetUnfolder]: For 4005/4005 co-relation queries the response was YES. [2022-07-12 10:18:44,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 1710 events. 0/1710 cut-off events. For 4005/4005 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7160 event pairs, 0 based on Foata normal form. 2226/3880 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-07-12 10:18:44,912 INFO L132 encePairwiseOnDemand]: 798/964 looper letters, 27 selfloop transitions, 0 changer transitions 12/797 dead transitions. [2022-07-12 10:18:44,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 797 transitions, 2485 flow [2022-07-12 10:18:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:18:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:18:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1733 transitions. [2022-07-12 10:18:44,914 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8988589211618258 [2022-07-12 10:18:44,914 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1733 transitions. [2022-07-12 10:18:44,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1733 transitions. [2022-07-12 10:18:44,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:44,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1733 transitions. [2022-07-12 10:18:44,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 866.5) internal successors, (1733), 2 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:44,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:44,917 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 964.0) internal successors, (2892), 3 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:44,917 INFO L186 Difference]: Start difference. First operand has 853 places, 964 transitions, 2765 flow. Second operand 2 states and 1733 transitions. [2022-07-12 10:18:44,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 797 transitions, 2485 flow [2022-07-12 10:18:44,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 797 transitions, 1783 flow, removed 351 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:44,928 INFO L242 Difference]: Finished difference. Result has 853 places, 785 transitions, 1705 flow [2022-07-12 10:18:44,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1705, PETRI_PLACES=853, PETRI_TRANSITIONS=785} [2022-07-12 10:18:44,929 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 0 predicate places. [2022-07-12 10:18:44,929 INFO L495 AbstractCegarLoop]: Abstraction has has 853 places, 785 transitions, 1705 flow [2022-07-12 10:18:44,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 770.5) internal successors, (1541), 2 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:44,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:44,929 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:44,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-07-12 10:18:44,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash -104812761, now seen corresponding path program 1 times [2022-07-12 10:18:44,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:44,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52504554] [2022-07-12 10:18:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:44,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:44,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52504554] [2022-07-12 10:18:44,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52504554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:44,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:44,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:44,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785268547] [2022-07-12 10:18:44,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:44,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:44,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 763 out of 964 [2022-07-12 10:18:44,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 853 places, 785 transitions, 1705 flow. Second operand has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:44,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:44,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 763 of 964 [2022-07-12 10:18:44,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:45,511 INFO L129 PetriNetUnfolder]: 0/1361 cut-off events. [2022-07-12 10:18:45,511 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-12 10:18:45,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 1361 events. 0/1361 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4796 event pairs, 0 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 162 conditions per place. [2022-07-12 10:18:45,514 INFO L132 encePairwiseOnDemand]: 961/964 looper letters, 36 selfloop transitions, 2 changer transitions 0/789 dead transitions. [2022-07-12 10:18:45,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 789 transitions, 1789 flow [2022-07-12 10:18:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2328 transitions. [2022-07-12 10:18:45,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8049792531120332 [2022-07-12 10:18:45,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2328 transitions. [2022-07-12 10:18:45,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2328 transitions. [2022-07-12 10:18:45,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:45,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2328 transitions. [2022-07-12 10:18:45,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 776.0) internal successors, (2328), 3 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 964.0) internal successors, (3856), 4 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,518 INFO L186 Difference]: Start difference. First operand has 853 places, 785 transitions, 1705 flow. Second operand 3 states and 2328 transitions. [2022-07-12 10:18:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 789 transitions, 1789 flow [2022-07-12 10:18:45,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 789 transitions, 1789 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:45,526 INFO L242 Difference]: Finished difference. Result has 844 places, 786 transitions, 1717 flow [2022-07-12 10:18:45,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=841, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1717, PETRI_PLACES=844, PETRI_TRANSITIONS=786} [2022-07-12 10:18:45,527 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, -9 predicate places. [2022-07-12 10:18:45,527 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 786 transitions, 1717 flow [2022-07-12 10:18:45,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 764.0) internal successors, (2292), 3 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:45,527 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:45,527 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] [2022-07-12 10:18:45,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-07-12 10:18:45,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:45,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:45,528 INFO L85 PathProgramCache]: Analyzing trace with hash -144204960, now seen corresponding path program 1 times [2022-07-12 10:18:45,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:45,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697565597] [2022-07-12 10:18:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:45,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697565597] [2022-07-12 10:18:45,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697565597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035342735] [2022-07-12 10:18:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:45,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:45,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:45,564 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:45,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-12 10:18:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:46,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:46,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035342735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:46,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:46,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605221104] [2022-07-12 10:18:46,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:46,182 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-12 10:18:46,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 786 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:46,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:46,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-12 10:18:46,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:46,817 INFO L129 PetriNetUnfolder]: 0/1335 cut-off events. [2022-07-12 10:18:46,818 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-12 10:18:46,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 1335 events. 0/1335 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4659 event pairs, 0 based on Foata normal form. 2/1337 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-12 10:18:46,820 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 37 selfloop transitions, 9 changer transitions 0/796 dead transitions. [2022-07-12 10:18:46,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 852 places, 796 transitions, 1831 flow [2022-07-12 10:18:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 6906 transitions. [2022-07-12 10:18:46,823 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959889349930843 [2022-07-12 10:18:46,823 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 6906 transitions. [2022-07-12 10:18:46,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 6906 transitions. [2022-07-12 10:18:46,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:46,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 6906 transitions. [2022-07-12 10:18:46,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 767.3333333333334) internal successors, (6906), 9 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:46,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:46,832 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 964.0) internal successors, (9640), 10 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:46,832 INFO L186 Difference]: Start difference. First operand has 844 places, 786 transitions, 1717 flow. Second operand 9 states and 6906 transitions. [2022-07-12 10:18:46,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 852 places, 796 transitions, 1831 flow [2022-07-12 10:18:46,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 796 transitions, 1829 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:46,841 INFO L242 Difference]: Finished difference. Result has 854 places, 792 transitions, 1765 flow [2022-07-12 10:18:46,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1765, PETRI_PLACES=854, PETRI_TRANSITIONS=792} [2022-07-12 10:18:46,841 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 1 predicate places. [2022-07-12 10:18:46,841 INFO L495 AbstractCegarLoop]: Abstraction has has 854 places, 792 transitions, 1765 flow [2022-07-12 10:18:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 764.3) internal successors, (7643), 10 states have internal predecessors, (7643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:46,842 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:46,842 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] [2022-07-12 10:18:46,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-07-12 10:18:47,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-07-12 10:18:47,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -588279275, now seen corresponding path program 1 times [2022-07-12 10:18:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:47,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123924709] [2022-07-12 10:18:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:47,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123924709] [2022-07-12 10:18:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123924709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110655634] [2022-07-12 10:18:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:47,088 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:47,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-12 10:18:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:47,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:47,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:47,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110655634] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:47,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:47,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325520120] [2022-07-12 10:18:47,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:47,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:47,783 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-12 10:18:47,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 854 places, 792 transitions, 1765 flow. Second operand has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:47,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:47,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-12 10:18:47,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:48,605 INFO L129 PetriNetUnfolder]: 0/1283 cut-off events. [2022-07-12 10:18:48,606 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-07-12 10:18:48,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1283 events. 0/1283 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4299 event pairs, 0 based on Foata normal form. 4/1287 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-07-12 10:18:48,608 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 45 selfloop transitions, 21 changer transitions 0/816 dead transitions. [2022-07-12 10:18:48,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 816 transitions, 2005 flow [2022-07-12 10:18:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:18:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:18:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16072 transitions. [2022-07-12 10:18:48,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7939142461964038 [2022-07-12 10:18:48,618 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16072 transitions. [2022-07-12 10:18:48,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16072 transitions. [2022-07-12 10:18:48,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:48,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16072 transitions. [2022-07-12 10:18:48,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 765.3333333333334) internal successors, (16072), 21 states have internal predecessors, (16072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:48,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:48,646 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 964.0) internal successors, (21208), 22 states have internal predecessors, (21208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:48,646 INFO L186 Difference]: Start difference. First operand has 854 places, 792 transitions, 1765 flow. Second operand 21 states and 16072 transitions. [2022-07-12 10:18:48,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 816 transitions, 2005 flow [2022-07-12 10:18:48,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 816 transitions, 1991 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:48,656 INFO L242 Difference]: Finished difference. Result has 878 places, 805 transitions, 1889 flow [2022-07-12 10:18:48,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1889, PETRI_PLACES=878, PETRI_TRANSITIONS=805} [2022-07-12 10:18:48,656 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 25 predicate places. [2022-07-12 10:18:48,656 INFO L495 AbstractCegarLoop]: Abstraction has has 878 places, 805 transitions, 1889 flow [2022-07-12 10:18:48,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 764.6111111111111) internal successors, (13763), 18 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:48,658 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:48,658 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:48,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:48,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-07-12 10:18:48,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash -216222325, now seen corresponding path program 1 times [2022-07-12 10:18:48,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:48,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068358744] [2022-07-12 10:18:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:48,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068358744] [2022-07-12 10:18:48,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068358744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:48,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157185120] [2022-07-12 10:18:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:48,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:48,992 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:48,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-12 10:18:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:18:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:49,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:49,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157185120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:49,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:49,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:18:49,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936129303] [2022-07-12 10:18:49,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:49,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:18:49,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:18:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:18:49,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-12 10:18:49,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 805 transitions, 1889 flow. Second operand has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:49,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:49,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-12 10:18:49,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:50,990 INFO L129 PetriNetUnfolder]: 0/1179 cut-off events. [2022-07-12 10:18:50,990 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2022-07-12 10:18:50,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1179 events. 0/1179 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3625 event pairs, 0 based on Foata normal form. 8/1187 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-07-12 10:18:50,992 INFO L132 encePairwiseOnDemand]: 958/964 looper letters, 61 selfloop transitions, 45 changer transitions 0/856 dead transitions. [2022-07-12 10:18:50,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 922 places, 856 transitions, 2417 flow [2022-07-12 10:18:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:18:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:18:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 34404 transitions. [2022-07-12 10:18:51,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7930843706777316 [2022-07-12 10:18:51,006 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 34404 transitions. [2022-07-12 10:18:51,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 34404 transitions. [2022-07-12 10:18:51,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:51,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 34404 transitions. [2022-07-12 10:18:51,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 764.5333333333333) internal successors, (34404), 45 states have internal predecessors, (34404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,062 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 964.0) internal successors, (44344), 46 states have internal predecessors, (44344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,062 INFO L186 Difference]: Start difference. First operand has 878 places, 805 transitions, 1889 flow. Second operand 45 states and 34404 transitions. [2022-07-12 10:18:51,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 922 places, 856 transitions, 2417 flow [2022-07-12 10:18:51,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 916 places, 856 transitions, 2377 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:18:51,075 INFO L242 Difference]: Finished difference. Result has 925 places, 830 transitions, 2167 flow [2022-07-12 10:18:51,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2167, PETRI_PLACES=925, PETRI_TRANSITIONS=830} [2022-07-12 10:18:51,076 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 72 predicate places. [2022-07-12 10:18:51,076 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 830 transitions, 2167 flow [2022-07-12 10:18:51,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 764.7941176470588) internal successors, (26003), 34 states have internal predecessors, (26003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:51,078 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:51,078 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:51,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-07-12 10:18:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-07-12 10:18:51,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1474444455, now seen corresponding path program 1 times [2022-07-12 10:18:51,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621159116] [2022-07-12 10:18:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:51,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621159116] [2022-07-12 10:18:51,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621159116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427884009] [2022-07-12 10:18:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:51,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:51,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:51,584 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:51,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-12 10:18:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:18:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:52,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:53,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427884009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:53,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:53,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:18:53,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648293891] [2022-07-12 10:18:53,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:18:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:53,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:18:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:18:53,163 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 762 out of 964 [2022-07-12 10:18:53,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 830 transitions, 2167 flow. Second operand has 66 states, 66 states have (on average 764.8939393939394) internal successors, (50483), 66 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:53,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:53,175 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 762 of 964 [2022-07-12 10:18:53,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:54,951 INFO L129 PetriNetUnfolder]: 0/1010 cut-off events. [2022-07-12 10:18:54,951 INFO L130 PetriNetUnfolder]: For 1740/1740 co-relation queries the response was YES. [2022-07-12 10:18:54,951 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 1010 events. 0/1010 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2541 event pairs, 0 based on Foata normal form. 13/1023 useless extension candidates. Maximal degree in co-relation 0. Up to 50 conditions per place. [2022-07-12 10:18:54,952 INFO L132 encePairwiseOnDemand]: 959/964 looper letters, 84 selfloop transitions, 82 changer transitions 0/904 dead transitions. [2022-07-12 10:18:54,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 904 transitions, 3117 flow [2022-07-12 10:18:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-12 10:18:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2022-07-12 10:18:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 64187 transitions. [2022-07-12 10:18:54,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926669630507804 [2022-07-12 10:18:54,975 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 64187 transitions. [2022-07-12 10:18:54,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 64187 transitions. [2022-07-12 10:18:54,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:54,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 64187 transitions. [2022-07-12 10:18:55,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 764.1309523809524) internal successors, (64187), 84 states have internal predecessors, (64187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 964.0) internal successors, (81940), 85 states have internal predecessors, (81940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,075 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 964.0) internal successors, (81940), 85 states have internal predecessors, (81940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,076 INFO L186 Difference]: Start difference. First operand has 925 places, 830 transitions, 2167 flow. Second operand 84 states and 64187 transitions. [2022-07-12 10:18:55,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 904 transitions, 3117 flow [2022-07-12 10:18:55,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 962 places, 904 transitions, 2892 flow, removed 22 selfloop flow, removed 33 redundant places. [2022-07-12 10:18:55,087 INFO L242 Difference]: Finished difference. Result has 962 places, 853 transitions, 2439 flow [2022-07-12 10:18:55,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=964, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=2439, PETRI_PLACES=962, PETRI_TRANSITIONS=853} [2022-07-12 10:18:55,088 INFO L279 CegarLoopForPetriNet]: 853 programPoint places, 109 predicate places. [2022-07-12 10:18:55,088 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 853 transitions, 2439 flow [2022-07-12 10:18:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 764.8939393939394) internal successors, (50483), 66 states have internal predecessors, (50483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:55,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:55,093 INFO L200 CegarLoopForPetriNet]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:55,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-07-12 10:18:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-07-12 10:18:55,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1939564189, now seen corresponding path program 1 times [2022-07-12 10:18:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:55,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063985235] [2022-07-12 10:18:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:55,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:55,328 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:18:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:18:55,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:18:55,385 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:18:55,385 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:18:55,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:18:55,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-07-12 10:18:55,386 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:18:55,386 WARN L231 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:18:55,386 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2022-07-12 10:18:55,439 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:18:55,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 882 places, 997 transitions, 2890 flow [2022-07-12 10:18:56,147 INFO L129 PetriNetUnfolder]: 284/2084 cut-off events. [2022-07-12 10:18:56,147 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-12 10:18:56,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 2084 events. 284/2084 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7877 event pairs, 0 based on Foata normal form. 0/1742 useless extension candidates. Maximal degree in co-relation 2444. Up to 58 conditions per place. [2022-07-12 10:18:56,314 INFO L82 GeneralOperation]: Start removeDead. Operand has 882 places, 997 transitions, 2890 flow [2022-07-12 10:18:56,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 882 places, 997 transitions, 2890 flow [2022-07-12 10:18:56,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:18:56,377 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:18:56,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:18:56,381 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-12 10:18:56,382 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:18:56,382 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:56,382 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] [2022-07-12 10:18:56,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1462249081, now seen corresponding path program 1 times [2022-07-12 10:18:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:56,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942186816] [2022-07-12 10:18:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:56,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:56,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942186816] [2022-07-12 10:18:56,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942186816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:18:56,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:18:56,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:18:56,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947979020] [2022-07-12 10:18:56,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:18:56,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:18:56,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:18:56,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:18:56,402 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 789 out of 997 [2022-07-12 10:18:56,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 997 transitions, 2890 flow. Second operand has 3 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:56,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:56,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 789 of 997 [2022-07-12 10:18:56,403 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:57,279 INFO L129 PetriNetUnfolder]: 0/1746 cut-off events. [2022-07-12 10:18:57,279 INFO L130 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2022-07-12 10:18:57,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 1746 events. 0/1746 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7383 event pairs, 0 based on Foata normal form. 13604/15294 useless extension candidates. Maximal degree in co-relation 0. Up to 168 conditions per place. [2022-07-12 10:18:57,282 INFO L132 encePairwiseOnDemand]: 822/997 looper letters, 37 selfloop transitions, 2 changer transitions 12/828 dead transitions. [2022-07-12 10:18:57,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 883 places, 828 transitions, 2630 flow [2022-07-12 10:18:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:18:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:18:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2586 transitions. [2022-07-12 10:18:57,284 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8645937813440321 [2022-07-12 10:18:57,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2586 transitions. [2022-07-12 10:18:57,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2586 transitions. [2022-07-12 10:18:57,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:57,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2586 transitions. [2022-07-12 10:18:57,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 862.0) internal successors, (2586), 3 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 997.0) internal successors, (3988), 4 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 997.0) internal successors, (3988), 4 states have internal predecessors, (3988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,287 INFO L186 Difference]: Start difference. First operand has 882 places, 997 transitions, 2890 flow. Second operand 3 states and 2586 transitions. [2022-07-12 10:18:57,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 883 places, 828 transitions, 2630 flow [2022-07-12 10:18:57,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 883 places, 828 transitions, 1874 flow, removed 378 selfloop flow, removed 0 redundant places. [2022-07-12 10:18:57,298 INFO L242 Difference]: Finished difference. Result has 884 places, 813 transitions, 1776 flow [2022-07-12 10:18:57,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=822, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1776, PETRI_PLACES=884, PETRI_TRANSITIONS=813} [2022-07-12 10:18:57,299 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 2 predicate places. [2022-07-12 10:18:57,299 INFO L495 AbstractCegarLoop]: Abstraction has has 884 places, 813 transitions, 1776 flow [2022-07-12 10:18:57,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 790.0) internal successors, (2370), 3 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,299 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:57,299 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] [2022-07-12 10:18:57,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-07-12 10:18:57,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1229546752, now seen corresponding path program 1 times [2022-07-12 10:18:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149780846] [2022-07-12 10:18:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:57,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149780846] [2022-07-12 10:18:57,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149780846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:57,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736503650] [2022-07-12 10:18:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:57,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:57,326 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:57,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-12 10:18:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:57,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:18:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:57,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:57,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736503650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:57,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:57,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:18:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259638951] [2022-07-12 10:18:57,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:18:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:18:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:18:57,975 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-12 10:18:57,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 813 transitions, 1776 flow. Second operand has 10 states, 10 states have (on average 790.3) internal successors, (7903), 10 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:57,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:57,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-12 10:18:57,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:18:58,639 INFO L129 PetriNetUnfolder]: 0/1384 cut-off events. [2022-07-12 10:18:58,639 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-12 10:18:58,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1384 events. 0/1384 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4834 event pairs, 0 based on Foata normal form. 2/1386 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-12 10:18:58,642 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 38 selfloop transitions, 9 changer transitions 0/823 dead transitions. [2022-07-12 10:18:58,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 823 transitions, 1892 flow [2022-07-12 10:18:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:18:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:18:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7141 transitions. [2022-07-12 10:18:58,645 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7958319402652402 [2022-07-12 10:18:58,645 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7141 transitions. [2022-07-12 10:18:58,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7141 transitions. [2022-07-12 10:18:58,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:18:58,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7141 transitions. [2022-07-12 10:18:58,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 793.4444444444445) internal successors, (7141), 9 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:58,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 997.0) internal successors, (9970), 10 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:58,654 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 997.0) internal successors, (9970), 10 states have internal predecessors, (9970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:58,654 INFO L186 Difference]: Start difference. First operand has 884 places, 813 transitions, 1776 flow. Second operand 9 states and 7141 transitions. [2022-07-12 10:18:58,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 823 transitions, 1892 flow [2022-07-12 10:18:58,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 823 transitions, 1890 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:18:58,663 INFO L242 Difference]: Finished difference. Result has 882 places, 819 transitions, 1824 flow [2022-07-12 10:18:58,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1824, PETRI_PLACES=882, PETRI_TRANSITIONS=819} [2022-07-12 10:18:58,664 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 0 predicate places. [2022-07-12 10:18:58,664 INFO L495 AbstractCegarLoop]: Abstraction has has 882 places, 819 transitions, 1824 flow [2022-07-12 10:18:58,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 790.3) internal successors, (7903), 10 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:58,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:18:58,665 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] [2022-07-12 10:18:58,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-07-12 10:18:58,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:58,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:18:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:18:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 567306805, now seen corresponding path program 1 times [2022-07-12 10:18:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:18:58,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045853889] [2022-07-12 10:18:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:58,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:18:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:58,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:18:58,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045853889] [2022-07-12 10:18:58,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045853889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:18:58,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551760927] [2022-07-12 10:18:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:18:58,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:18:58,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:18:58,926 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:18:58,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-12 10:18:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:18:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:18:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:18:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:59,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:18:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:18:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551760927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:18:59,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:18:59,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:18:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209866628] [2022-07-12 10:18:59,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:18:59,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:18:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:18:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:18:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:18:59,650 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-12 10:18:59,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 819 transitions, 1824 flow. Second operand has 18 states, 18 states have (on average 790.6111111111111) internal successors, (14231), 18 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:18:59,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:18:59,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-12 10:18:59,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:00,438 INFO L129 PetriNetUnfolder]: 0/1332 cut-off events. [2022-07-12 10:19:00,439 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-12 10:19:00,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 1332 events. 0/1332 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4493 event pairs, 0 based on Foata normal form. 4/1336 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-07-12 10:19:00,441 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 46 selfloop transitions, 21 changer transitions 0/843 dead transitions. [2022-07-12 10:19:00,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 902 places, 843 transitions, 2066 flow [2022-07-12 10:19:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 16619 transitions. [2022-07-12 10:19:00,448 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7937622390982472 [2022-07-12 10:19:00,448 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 16619 transitions. [2022-07-12 10:19:00,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 16619 transitions. [2022-07-12 10:19:00,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:00,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 16619 transitions. [2022-07-12 10:19:00,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 791.3809523809524) internal successors, (16619), 21 states have internal predecessors, (16619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:00,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 997.0) internal successors, (21934), 22 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:00,472 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 997.0) internal successors, (21934), 22 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:00,472 INFO L186 Difference]: Start difference. First operand has 882 places, 819 transitions, 1824 flow. Second operand 21 states and 16619 transitions. [2022-07-12 10:19:00,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 902 places, 843 transitions, 2066 flow [2022-07-12 10:19:00,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 843 transitions, 2052 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:00,482 INFO L242 Difference]: Finished difference. Result has 906 places, 832 transitions, 1948 flow [2022-07-12 10:19:00,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1948, PETRI_PLACES=906, PETRI_TRANSITIONS=832} [2022-07-12 10:19:00,483 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 24 predicate places. [2022-07-12 10:19:00,483 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 832 transitions, 1948 flow [2022-07-12 10:19:00,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 790.6111111111111) internal successors, (14231), 18 states have internal predecessors, (14231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:00,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:00,484 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:00,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:00,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:00,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:00,685 INFO L85 PathProgramCache]: Analyzing trace with hash 970123947, now seen corresponding path program 1 times [2022-07-12 10:19:00,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:00,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997461864] [2022-07-12 10:19:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:00,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:00,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997461864] [2022-07-12 10:19:00,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997461864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816425132] [2022-07-12 10:19:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:00,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:00,792 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-12 10:19:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:01,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:01,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816425132] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:01,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:01,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:01,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036638228] [2022-07-12 10:19:01,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:01,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:01,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:01,734 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-12 10:19:01,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 832 transitions, 1948 flow. Second operand has 34 states, 34 states have (on average 790.7941176470588) internal successors, (26887), 34 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:01,742 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:01,742 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-12 10:19:01,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:02,767 INFO L129 PetriNetUnfolder]: 0/1228 cut-off events. [2022-07-12 10:19:02,767 INFO L130 PetriNetUnfolder]: For 627/627 co-relation queries the response was YES. [2022-07-12 10:19:02,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1963 conditions, 1228 events. 0/1228 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3805 event pairs, 0 based on Foata normal form. 8/1236 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-07-12 10:19:02,770 INFO L132 encePairwiseOnDemand]: 991/997 looper letters, 62 selfloop transitions, 45 changer transitions 0/883 dead transitions. [2022-07-12 10:19:02,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 950 places, 883 transitions, 2478 flow [2022-07-12 10:19:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 35575 transitions. [2022-07-12 10:19:02,783 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7929343586314499 [2022-07-12 10:19:02,784 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 35575 transitions. [2022-07-12 10:19:02,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 35575 transitions. [2022-07-12 10:19:02,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:02,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 35575 transitions. [2022-07-12 10:19:02,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 790.5555555555555) internal successors, (35575), 45 states have internal predecessors, (35575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:02,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 997.0) internal successors, (45862), 46 states have internal predecessors, (45862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:02,840 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 997.0) internal successors, (45862), 46 states have internal predecessors, (45862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:02,840 INFO L186 Difference]: Start difference. First operand has 906 places, 832 transitions, 1948 flow. Second operand 45 states and 35575 transitions. [2022-07-12 10:19:02,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 950 places, 883 transitions, 2478 flow [2022-07-12 10:19:02,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 944 places, 883 transitions, 2438 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:02,851 INFO L242 Difference]: Finished difference. Result has 953 places, 857 transitions, 2226 flow [2022-07-12 10:19:02,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2226, PETRI_PLACES=953, PETRI_TRANSITIONS=857} [2022-07-12 10:19:02,852 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 71 predicate places. [2022-07-12 10:19:02,852 INFO L495 AbstractCegarLoop]: Abstraction has has 953 places, 857 transitions, 2226 flow [2022-07-12 10:19:02,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 790.7941176470588) internal successors, (26887), 34 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:02,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:02,854 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:02,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-12 10:19:03,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:03,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash 991964103, now seen corresponding path program 1 times [2022-07-12 10:19:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:03,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310275881] [2022-07-12 10:19:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:03,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310275881] [2022-07-12 10:19:03,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310275881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211640895] [2022-07-12 10:19:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:03,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:03,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:03,371 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:03,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-12 10:19:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:04,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:04,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211640895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:04,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:04,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944827582] [2022-07-12 10:19:04,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:04,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:04,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:04,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:04,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 788 out of 997 [2022-07-12 10:19:04,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 857 transitions, 2226 flow. Second operand has 66 states, 66 states have (on average 790.8939393939394) internal successors, (52199), 66 states have internal predecessors, (52199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:04,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:04,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 788 of 997 [2022-07-12 10:19:04,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:06,802 INFO L129 PetriNetUnfolder]: 0/1046 cut-off events. [2022-07-12 10:19:06,802 INFO L130 PetriNetUnfolder]: For 1861/1861 co-relation queries the response was YES. [2022-07-12 10:19:06,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 1046 events. 0/1046 cut-off events. For 1861/1861 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2639 event pairs, 0 based on Foata normal form. 14/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 52 conditions per place. [2022-07-12 10:19:06,804 INFO L132 encePairwiseOnDemand]: 992/997 looper letters, 87 selfloop transitions, 85 changer transitions 0/936 dead transitions. [2022-07-12 10:19:06,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1026 places, 936 transitions, 3232 flow [2022-07-12 10:19:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-12 10:19:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-07-12 10:19:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 68742 transitions. [2022-07-12 10:19:06,831 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925154774668834 [2022-07-12 10:19:06,831 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 68742 transitions. [2022-07-12 10:19:06,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 68742 transitions. [2022-07-12 10:19:06,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:06,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 68742 transitions. [2022-07-12 10:19:06,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 790.1379310344828) internal successors, (68742), 87 states have internal predecessors, (68742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:06,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 997.0) internal successors, (87736), 88 states have internal predecessors, (87736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:06,942 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 997.0) internal successors, (87736), 88 states have internal predecessors, (87736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:06,942 INFO L186 Difference]: Start difference. First operand has 953 places, 857 transitions, 2226 flow. Second operand 87 states and 68742 transitions. [2022-07-12 10:19:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1026 places, 936 transitions, 3232 flow [2022-07-12 10:19:06,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 993 places, 936 transitions, 2999 flow, removed 23 selfloop flow, removed 33 redundant places. [2022-07-12 10:19:06,956 INFO L242 Difference]: Finished difference. Result has 993 places, 883 transitions, 2527 flow [2022-07-12 10:19:06,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=997, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=2527, PETRI_PLACES=993, PETRI_TRANSITIONS=883} [2022-07-12 10:19:06,957 INFO L279 CegarLoopForPetriNet]: 882 programPoint places, 111 predicate places. [2022-07-12 10:19:06,957 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 883 transitions, 2527 flow [2022-07-12 10:19:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 790.8939393939394) internal successors, (52199), 66 states have internal predecessors, (52199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:06,961 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:06,962 INFO L200 CegarLoopForPetriNet]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:06,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-07-12 10:19:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:07,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1128405327, now seen corresponding path program 1 times [2022-07-12 10:19:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:07,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302145305] [2022-07-12 10:19:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:07,200 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:07,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:07,266 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:07,266 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:07,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-07-12 10:19:07,266 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:19:07,267 WARN L231 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:07,267 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2022-07-12 10:19:07,321 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:07,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 911 places, 1030 transitions, 3017 flow [2022-07-12 10:19:08,073 INFO L129 PetriNetUnfolder]: 294/2156 cut-off events. [2022-07-12 10:19:08,073 INFO L130 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2022-07-12 10:19:08,229 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 2156 events. 294/2156 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8137 event pairs, 0 based on Foata normal form. 0/1802 useless extension candidates. Maximal degree in co-relation 2547. Up to 60 conditions per place. [2022-07-12 10:19:08,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 911 places, 1030 transitions, 3017 flow [2022-07-12 10:19:08,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 911 places, 1030 transitions, 3017 flow [2022-07-12 10:19:08,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:08,291 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:19:08,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:08,295 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-12 10:19:08,295 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:08,295 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:08,295 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] [2022-07-12 10:19:08,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash -787745722, now seen corresponding path program 1 times [2022-07-12 10:19:08,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:08,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707579741] [2022-07-12 10:19:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:08,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:08,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:08,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707579741] [2022-07-12 10:19:08,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707579741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:08,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:08,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:19:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401707469] [2022-07-12 10:19:08,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:19:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:19:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:19:08,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 822 out of 1030 [2022-07-12 10:19:08,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 1030 transitions, 3017 flow. Second operand has 2 states, 2 states have (on average 822.5) internal successors, (1645), 2 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:08,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:08,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 822 of 1030 [2022-07-12 10:19:08,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:09,074 INFO L129 PetriNetUnfolder]: 0/1832 cut-off events. [2022-07-12 10:19:09,075 INFO L130 PetriNetUnfolder]: For 4901/4901 co-relation queries the response was YES. [2022-07-12 10:19:09,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2385 conditions, 1832 events. 0/1832 cut-off events. For 4901/4901 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 7846 event pairs, 0 based on Foata normal form. 2564/4336 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:19:09,078 INFO L132 encePairwiseOnDemand]: 852/1030 looper letters, 29 selfloop transitions, 0 changer transitions 12/851 dead transitions. [2022-07-12 10:19:09,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 851 transitions, 2717 flow [2022-07-12 10:19:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:19:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:19:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1851 transitions. [2022-07-12 10:19:09,079 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8985436893203883 [2022-07-12 10:19:09,080 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1851 transitions. [2022-07-12 10:19:09,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1851 transitions. [2022-07-12 10:19:09,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:09,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1851 transitions. [2022-07-12 10:19:09,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 925.5) internal successors, (1851), 2 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1030.0) internal successors, (3090), 3 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,082 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1030.0) internal successors, (3090), 3 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,082 INFO L186 Difference]: Start difference. First operand has 911 places, 1030 transitions, 3017 flow. Second operand 2 states and 1851 transitions. [2022-07-12 10:19:09,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 851 transitions, 2717 flow [2022-07-12 10:19:09,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 851 transitions, 1905 flow, removed 406 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:09,097 INFO L242 Difference]: Finished difference. Result has 911 places, 839 transitions, 1823 flow [2022-07-12 10:19:09,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=851, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1823, PETRI_PLACES=911, PETRI_TRANSITIONS=839} [2022-07-12 10:19:09,097 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 0 predicate places. [2022-07-12 10:19:09,097 INFO L495 AbstractCegarLoop]: Abstraction has has 911 places, 839 transitions, 1823 flow [2022-07-12 10:19:09,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 822.5) internal successors, (1645), 2 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,098 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:09,098 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] [2022-07-12 10:19:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-07-12 10:19:09,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:09,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1081148729, now seen corresponding path program 1 times [2022-07-12 10:19:09,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:09,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031435414] [2022-07-12 10:19:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:09,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:09,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031435414] [2022-07-12 10:19:09,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031435414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:09,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:09,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433002405] [2022-07-12 10:19:09,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:09,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:09,120 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 815 out of 1030 [2022-07-12 10:19:09,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 839 transitions, 1823 flow. Second operand has 3 states, 3 states have (on average 816.0) internal successors, (2448), 3 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,121 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:09,121 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 815 of 1030 [2022-07-12 10:19:09,121 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:09,835 INFO L129 PetriNetUnfolder]: 0/1459 cut-off events. [2022-07-12 10:19:09,836 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-12 10:19:09,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 1459 events. 0/1459 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5171 event pairs, 0 based on Foata normal form. 0/1430 useless extension candidates. Maximal degree in co-relation 0. Up to 174 conditions per place. [2022-07-12 10:19:09,838 INFO L132 encePairwiseOnDemand]: 1027/1030 looper letters, 38 selfloop transitions, 2 changer transitions 0/843 dead transitions. [2022-07-12 10:19:09,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 901 places, 843 transitions, 1911 flow [2022-07-12 10:19:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2486 transitions. [2022-07-12 10:19:09,840 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8045307443365696 [2022-07-12 10:19:09,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2486 transitions. [2022-07-12 10:19:09,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2486 transitions. [2022-07-12 10:19:09,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:09,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2486 transitions. [2022-07-12 10:19:09,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 828.6666666666666) internal successors, (2486), 3 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1030.0) internal successors, (4120), 4 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1030.0) internal successors, (4120), 4 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,844 INFO L186 Difference]: Start difference. First operand has 911 places, 839 transitions, 1823 flow. Second operand 3 states and 2486 transitions. [2022-07-12 10:19:09,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 901 places, 843 transitions, 1911 flow [2022-07-12 10:19:09,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 843 transitions, 1911 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:09,852 INFO L242 Difference]: Finished difference. Result has 902 places, 840 transitions, 1835 flow [2022-07-12 10:19:09,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1835, PETRI_PLACES=902, PETRI_TRANSITIONS=840} [2022-07-12 10:19:09,853 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, -9 predicate places. [2022-07-12 10:19:09,853 INFO L495 AbstractCegarLoop]: Abstraction has has 902 places, 840 transitions, 1835 flow [2022-07-12 10:19:09,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 816.0) internal successors, (2448), 3 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:09,854 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:09,854 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] [2022-07-12 10:19:09,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-07-12 10:19:09,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1578816032, now seen corresponding path program 1 times [2022-07-12 10:19:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:09,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717157206] [2022-07-12 10:19:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:09,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717157206] [2022-07-12 10:19:09,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717157206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:09,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378529407] [2022-07-12 10:19:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:09,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:09,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:09,880 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:09,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-12 10:19:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:10,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:10,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378529407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:10,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:10,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:10,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126909542] [2022-07-12 10:19:10,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:10,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:10,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:10,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:10,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-12 10:19:10,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 840 transitions, 1835 flow. Second operand has 10 states, 10 states have (on average 816.3) internal successors, (8163), 10 states have internal predecessors, (8163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:10,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:10,572 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-12 10:19:10,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:11,275 INFO L129 PetriNetUnfolder]: 0/1433 cut-off events. [2022-07-12 10:19:11,275 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-12 10:19:11,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 1433 events. 0/1433 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5016 event pairs, 0 based on Foata normal form. 2/1435 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-07-12 10:19:11,278 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 39 selfloop transitions, 9 changer transitions 0/850 dead transitions. [2022-07-12 10:19:11,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 850 transitions, 1953 flow [2022-07-12 10:19:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7376 transitions. [2022-07-12 10:19:11,282 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7956850053937432 [2022-07-12 10:19:11,282 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7376 transitions. [2022-07-12 10:19:11,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7376 transitions. [2022-07-12 10:19:11,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:11,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7376 transitions. [2022-07-12 10:19:11,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 819.5555555555555) internal successors, (7376), 9 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:11,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1030.0) internal successors, (10300), 10 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:11,291 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1030.0) internal successors, (10300), 10 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:11,291 INFO L186 Difference]: Start difference. First operand has 902 places, 840 transitions, 1835 flow. Second operand 9 states and 7376 transitions. [2022-07-12 10:19:11,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 850 transitions, 1953 flow [2022-07-12 10:19:11,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 850 transitions, 1951 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:11,301 INFO L242 Difference]: Finished difference. Result has 912 places, 846 transitions, 1883 flow [2022-07-12 10:19:11,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1883, PETRI_PLACES=912, PETRI_TRANSITIONS=846} [2022-07-12 10:19:11,302 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 1 predicate places. [2022-07-12 10:19:11,302 INFO L495 AbstractCegarLoop]: Abstraction has has 912 places, 846 transitions, 1883 flow [2022-07-12 10:19:11,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 816.3) internal successors, (8163), 10 states have internal predecessors, (8163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:11,302 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:11,303 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] [2022-07-12 10:19:11,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:11,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:11,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:11,503 INFO L85 PathProgramCache]: Analyzing trace with hash -409704683, now seen corresponding path program 1 times [2022-07-12 10:19:11,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:11,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461390780] [2022-07-12 10:19:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:11,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:11,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461390780] [2022-07-12 10:19:11,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461390780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602093080] [2022-07-12 10:19:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:11,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:11,549 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:11,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-12 10:19:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:12,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602093080] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:12,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:12,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:12,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042831758] [2022-07-12 10:19:12,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:12,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:12,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:12,314 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-12 10:19:12,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 912 places, 846 transitions, 1883 flow. Second operand has 18 states, 18 states have (on average 816.6111111111111) internal successors, (14699), 18 states have internal predecessors, (14699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:12,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:12,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-12 10:19:12,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:13,131 INFO L129 PetriNetUnfolder]: 0/1381 cut-off events. [2022-07-12 10:19:13,132 INFO L130 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-07-12 10:19:13,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 1381 events. 0/1381 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4668 event pairs, 0 based on Foata normal form. 4/1385 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-07-12 10:19:13,134 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 47 selfloop transitions, 21 changer transitions 0/870 dead transitions. [2022-07-12 10:19:13,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 870 transitions, 2127 flow [2022-07-12 10:19:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17166 transitions. [2022-07-12 10:19:13,141 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793619972260749 [2022-07-12 10:19:13,141 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17166 transitions. [2022-07-12 10:19:13,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17166 transitions. [2022-07-12 10:19:13,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:13,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17166 transitions. [2022-07-12 10:19:13,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 817.4285714285714) internal successors, (17166), 21 states have internal predecessors, (17166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:13,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1030.0) internal successors, (22660), 22 states have internal predecessors, (22660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:13,166 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1030.0) internal successors, (22660), 22 states have internal predecessors, (22660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:13,166 INFO L186 Difference]: Start difference. First operand has 912 places, 846 transitions, 1883 flow. Second operand 21 states and 17166 transitions. [2022-07-12 10:19:13,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 870 transitions, 2127 flow [2022-07-12 10:19:13,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 931 places, 870 transitions, 2113 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:13,176 INFO L242 Difference]: Finished difference. Result has 936 places, 859 transitions, 2007 flow [2022-07-12 10:19:13,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=911, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2007, PETRI_PLACES=936, PETRI_TRANSITIONS=859} [2022-07-12 10:19:13,177 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 25 predicate places. [2022-07-12 10:19:13,177 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 859 transitions, 2007 flow [2022-07-12 10:19:13,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 816.6111111111111) internal successors, (14699), 18 states have internal predecessors, (14699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:13,178 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:13,178 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:13,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-07-12 10:19:13,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-07-12 10:19:13,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:13,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:13,379 INFO L85 PathProgramCache]: Analyzing trace with hash -293869813, now seen corresponding path program 1 times [2022-07-12 10:19:13,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:13,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485793428] [2022-07-12 10:19:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:13,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485793428] [2022-07-12 10:19:13,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485793428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762847542] [2022-07-12 10:19:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:13,481 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:13,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-12 10:19:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:14,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:14,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:14,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762847542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:14,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:14,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453976198] [2022-07-12 10:19:14,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:14,463 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-12 10:19:14,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 859 transitions, 2007 flow. Second operand has 34 states, 34 states have (on average 816.7941176470588) internal successors, (27771), 34 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:14,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:14,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-12 10:19:14,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:15,602 INFO L129 PetriNetUnfolder]: 0/1277 cut-off events. [2022-07-12 10:19:15,602 INFO L130 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-07-12 10:19:15,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1277 events. 0/1277 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3991 event pairs, 0 based on Foata normal form. 8/1285 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-07-12 10:19:15,605 INFO L132 encePairwiseOnDemand]: 1024/1030 looper letters, 63 selfloop transitions, 45 changer transitions 0/910 dead transitions. [2022-07-12 10:19:15,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 980 places, 910 transitions, 2539 flow [2022-07-12 10:19:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36746 transitions. [2022-07-12 10:19:15,618 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7927939590075512 [2022-07-12 10:19:15,619 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36746 transitions. [2022-07-12 10:19:15,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36746 transitions. [2022-07-12 10:19:15,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:15,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36746 transitions. [2022-07-12 10:19:15,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 816.5777777777778) internal successors, (36746), 45 states have internal predecessors, (36746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:15,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1030.0) internal successors, (47380), 46 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:15,678 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1030.0) internal successors, (47380), 46 states have internal predecessors, (47380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:15,678 INFO L186 Difference]: Start difference. First operand has 936 places, 859 transitions, 2007 flow. Second operand 45 states and 36746 transitions. [2022-07-12 10:19:15,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 980 places, 910 transitions, 2539 flow [2022-07-12 10:19:15,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 910 transitions, 2499 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:15,690 INFO L242 Difference]: Finished difference. Result has 983 places, 884 transitions, 2285 flow [2022-07-12 10:19:15,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2285, PETRI_PLACES=983, PETRI_TRANSITIONS=884} [2022-07-12 10:19:15,691 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 72 predicate places. [2022-07-12 10:19:15,691 INFO L495 AbstractCegarLoop]: Abstraction has has 983 places, 884 transitions, 2285 flow [2022-07-12 10:19:15,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 816.7941176470588) internal successors, (27771), 34 states have internal predecessors, (27771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:15,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:15,694 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:15,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-12 10:19:15,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-07-12 10:19:15,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1512921305, now seen corresponding path program 1 times [2022-07-12 10:19:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:15,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459081251] [2022-07-12 10:19:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:16,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459081251] [2022-07-12 10:19:16,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459081251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604834651] [2022-07-12 10:19:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:16,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:16,199 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:16,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-12 10:19:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:16,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:17,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:17,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604834651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:17,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:17,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84036445] [2022-07-12 10:19:17,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:17,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:17,771 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 814 out of 1030 [2022-07-12 10:19:17,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 983 places, 884 transitions, 2285 flow. Second operand has 66 states, 66 states have (on average 816.8939393939394) internal successors, (53915), 66 states have internal predecessors, (53915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:17,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:17,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 814 of 1030 [2022-07-12 10:19:17,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:19,767 INFO L129 PetriNetUnfolder]: 0/1082 cut-off events. [2022-07-12 10:19:19,768 INFO L130 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-07-12 10:19:19,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 1082 events. 0/1082 cut-off events. For 1982/1982 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2737 event pairs, 0 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-07-12 10:19:19,770 INFO L132 encePairwiseOnDemand]: 1025/1030 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-07-12 10:19:19,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-07-12 10:19:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-12 10:19:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-12 10:19:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73453 transitions. [2022-07-12 10:19:19,800 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7923732470334413 [2022-07-12 10:19:19,800 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73453 transitions. [2022-07-12 10:19:19,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73453 transitions. [2022-07-12 10:19:19,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:19,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73453 transitions. [2022-07-12 10:19:19,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 816.1444444444444) internal successors, (73453), 90 states have internal predecessors, (73453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:19,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 1030.0) internal successors, (93730), 91 states have internal predecessors, (93730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:19,920 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 1030.0) internal successors, (93730), 91 states have internal predecessors, (93730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:19,921 INFO L186 Difference]: Start difference. First operand has 983 places, 884 transitions, 2285 flow. Second operand 90 states and 73453 transitions. [2022-07-12 10:19:19,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-07-12 10:19:19,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-07-12 10:19:20,128 INFO L242 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-07-12 10:19:20,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1030, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=2615, PETRI_PLACES=1026, PETRI_TRANSITIONS=913} [2022-07-12 10:19:20,129 INFO L279 CegarLoopForPetriNet]: 911 programPoint places, 115 predicate places. [2022-07-12 10:19:20,129 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-07-12 10:19:20,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 816.8939393939394) internal successors, (53915), 66 states have internal predecessors, (53915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:20,135 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:20,135 INFO L200 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:20,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-07-12 10:19:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-07-12 10:19:20,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1873476730, now seen corresponding path program 1 times [2022-07-12 10:19:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598085969] [2022-07-12 10:19:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:20,373 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:20,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:20,443 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:20,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:20,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-07-12 10:19:20,444 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:20,444 WARN L231 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:20,444 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-07-12 10:19:20,499 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:20,505 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 940 places, 1063 transitions, 3146 flow [2022-07-12 10:19:21,323 INFO L129 PetriNetUnfolder]: 304/2228 cut-off events. [2022-07-12 10:19:21,323 INFO L130 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-07-12 10:19:21,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 2228 events. 304/2228 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8444 event pairs, 0 based on Foata normal form. 0/1862 useless extension candidates. Maximal degree in co-relation 2651. Up to 62 conditions per place. [2022-07-12 10:19:21,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 940 places, 1063 transitions, 3146 flow [2022-07-12 10:19:21,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 940 places, 1063 transitions, 3146 flow [2022-07-12 10:19:21,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:21,573 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:19:21,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:21,577 INFO L129 PetriNetUnfolder]: 5/94 cut-off events. [2022-07-12 10:19:21,577 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:21,577 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:21,577 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] [2022-07-12 10:19:21,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1331891302, now seen corresponding path program 1 times [2022-07-12 10:19:21,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:21,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441133249] [2022-07-12 10:19:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:21,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441133249] [2022-07-12 10:19:21,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441133249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:21,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:21,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:19:21,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701029655] [2022-07-12 10:19:21,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:19:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:19:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:19:21,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 848 out of 1063 [2022-07-12 10:19:21,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 1063 transitions, 3146 flow. Second operand has 2 states, 2 states have (on average 848.5) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:21,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:21,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 848 of 1063 [2022-07-12 10:19:21,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:22,410 INFO L129 PetriNetUnfolder]: 0/1893 cut-off events. [2022-07-12 10:19:22,411 INFO L130 PetriNetUnfolder]: For 5395/5395 co-relation queries the response was YES. [2022-07-12 10:19:22,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 1893 events. 0/1893 cut-off events. For 5395/5395 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8050 event pairs, 0 based on Foata normal form. 2742/4573 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-07-12 10:19:22,414 INFO L132 encePairwiseOnDemand]: 879/1063 looper letters, 30 selfloop transitions, 0 changer transitions 12/878 dead transitions. [2022-07-12 10:19:22,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 878 transitions, 2836 flow [2022-07-12 10:19:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:19:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:19:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1910 transitions. [2022-07-12 10:19:22,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8984007525870179 [2022-07-12 10:19:22,416 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1910 transitions. [2022-07-12 10:19:22,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1910 transitions. [2022-07-12 10:19:22,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:22,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1910 transitions. [2022-07-12 10:19:22,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 955.0) internal successors, (1910), 2 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:22,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1063.0) internal successors, (3189), 3 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:22,418 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1063.0) internal successors, (3189), 3 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:22,418 INFO L186 Difference]: Start difference. First operand has 940 places, 1063 transitions, 3146 flow. Second operand 2 states and 1910 transitions. [2022-07-12 10:19:22,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 878 transitions, 2836 flow [2022-07-12 10:19:22,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 878 transitions, 1966 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:22,433 INFO L242 Difference]: Finished difference. Result has 940 places, 866 transitions, 1882 flow [2022-07-12 10:19:22,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=939, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1882, PETRI_PLACES=940, PETRI_TRANSITIONS=866} [2022-07-12 10:19:22,434 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 0 predicate places. [2022-07-12 10:19:22,434 INFO L495 AbstractCegarLoop]: Abstraction has has 940 places, 866 transitions, 1882 flow [2022-07-12 10:19:22,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 848.5) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:22,434 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:22,434 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] [2022-07-12 10:19:22,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-07-12 10:19:22,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1038488295, now seen corresponding path program 1 times [2022-07-12 10:19:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:22,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563535111] [2022-07-12 10:19:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563535111] [2022-07-12 10:19:22,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563535111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:22,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:22,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717763283] [2022-07-12 10:19:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:22,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:22,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:22,465 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 841 out of 1063 [2022-07-12 10:19:22,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 940 places, 866 transitions, 1882 flow. Second operand has 3 states, 3 states have (on average 842.0) internal successors, (2526), 3 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:22,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:22,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 841 of 1063 [2022-07-12 10:19:22,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:23,199 INFO L129 PetriNetUnfolder]: 0/1508 cut-off events. [2022-07-12 10:19:23,199 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-07-12 10:19:23,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 1508 events. 0/1508 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5351 event pairs, 0 based on Foata normal form. 0/1478 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2022-07-12 10:19:23,202 INFO L132 encePairwiseOnDemand]: 1060/1063 looper letters, 39 selfloop transitions, 2 changer transitions 0/870 dead transitions. [2022-07-12 10:19:23,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 870 transitions, 1972 flow [2022-07-12 10:19:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2565 transitions. [2022-07-12 10:19:23,204 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8043273753527752 [2022-07-12 10:19:23,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2565 transitions. [2022-07-12 10:19:23,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2565 transitions. [2022-07-12 10:19:23,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:23,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2565 transitions. [2022-07-12 10:19:23,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 855.0) internal successors, (2565), 3 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1063.0) internal successors, (4252), 4 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1063.0) internal successors, (4252), 4 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,208 INFO L186 Difference]: Start difference. First operand has 940 places, 866 transitions, 1882 flow. Second operand 3 states and 2565 transitions. [2022-07-12 10:19:23,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 870 transitions, 1972 flow [2022-07-12 10:19:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 930 places, 870 transitions, 1972 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:23,218 INFO L242 Difference]: Finished difference. Result has 931 places, 867 transitions, 1894 flow [2022-07-12 10:19:23,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1894, PETRI_PLACES=931, PETRI_TRANSITIONS=867} [2022-07-12 10:19:23,219 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, -9 predicate places. [2022-07-12 10:19:23,219 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 867 transitions, 1894 flow [2022-07-12 10:19:23,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 842.0) internal successors, (2526), 3 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,219 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:23,219 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] [2022-07-12 10:19:23,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-07-12 10:19:23,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 903602880, now seen corresponding path program 1 times [2022-07-12 10:19:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362568434] [2022-07-12 10:19:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:23,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362568434] [2022-07-12 10:19:23,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362568434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420183081] [2022-07-12 10:19:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:23,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:23,253 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:23,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-12 10:19:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:23,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:23,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:23,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:23,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420183081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:23,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:23,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:23,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798881165] [2022-07-12 10:19:23,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:23,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:23,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:23,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:23,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:23,997 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-12 10:19:23,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 867 transitions, 1894 flow. Second operand has 10 states, 10 states have (on average 842.3) internal successors, (8423), 10 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:23,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:24,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-12 10:19:24,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:24,766 INFO L129 PetriNetUnfolder]: 0/1482 cut-off events. [2022-07-12 10:19:24,766 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-07-12 10:19:24,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 1482 events. 0/1482 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5191 event pairs, 0 based on Foata normal form. 2/1484 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-07-12 10:19:24,769 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 40 selfloop transitions, 9 changer transitions 0/877 dead transitions. [2022-07-12 10:19:24,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 877 transitions, 2014 flow [2022-07-12 10:19:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7611 transitions. [2022-07-12 10:19:24,772 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7955471934775792 [2022-07-12 10:19:24,772 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7611 transitions. [2022-07-12 10:19:24,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7611 transitions. [2022-07-12 10:19:24,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:24,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7611 transitions. [2022-07-12 10:19:24,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 845.6666666666666) internal successors, (7611), 9 states have internal predecessors, (7611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1063.0) internal successors, (10630), 10 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1063.0) internal successors, (10630), 10 states have internal predecessors, (10630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,782 INFO L186 Difference]: Start difference. First operand has 931 places, 867 transitions, 1894 flow. Second operand 9 states and 7611 transitions. [2022-07-12 10:19:24,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 877 transitions, 2014 flow [2022-07-12 10:19:24,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 938 places, 877 transitions, 2012 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:24,791 INFO L242 Difference]: Finished difference. Result has 941 places, 873 transitions, 1942 flow [2022-07-12 10:19:24,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=930, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1942, PETRI_PLACES=941, PETRI_TRANSITIONS=873} [2022-07-12 10:19:24,791 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 1 predicate places. [2022-07-12 10:19:24,791 INFO L495 AbstractCegarLoop]: Abstraction has has 941 places, 873 transitions, 1942 flow [2022-07-12 10:19:24,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 842.3) internal successors, (8423), 10 states have internal predecessors, (8423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:24,792 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:24,792 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] [2022-07-12 10:19:24,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-07-12 10:19:24,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:24,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:24,993 INFO L85 PathProgramCache]: Analyzing trace with hash 775653557, now seen corresponding path program 1 times [2022-07-12 10:19:24,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147192292] [2022-07-12 10:19:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:25,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147192292] [2022-07-12 10:19:25,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147192292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289613434] [2022-07-12 10:19:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:25,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:25,046 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:25,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-12 10:19:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:25,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:25,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289613434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:25,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187844080] [2022-07-12 10:19:25,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:25,887 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-12 10:19:25,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 941 places, 873 transitions, 1942 flow. Second operand has 18 states, 18 states have (on average 842.6111111111111) internal successors, (15167), 18 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:25,893 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:25,893 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-12 10:19:25,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:26,781 INFO L129 PetriNetUnfolder]: 0/1430 cut-off events. [2022-07-12 10:19:26,781 INFO L130 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-07-12 10:19:26,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2048 conditions, 1430 events. 0/1430 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4851 event pairs, 0 based on Foata normal form. 4/1434 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-07-12 10:19:26,784 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 48 selfloop transitions, 21 changer transitions 0/897 dead transitions. [2022-07-12 10:19:26,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 961 places, 897 transitions, 2188 flow [2022-07-12 10:19:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17713 transitions. [2022-07-12 10:19:26,791 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7934865385476862 [2022-07-12 10:19:26,792 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17713 transitions. [2022-07-12 10:19:26,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17713 transitions. [2022-07-12 10:19:26,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:26,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17713 transitions. [2022-07-12 10:19:26,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 843.4761904761905) internal successors, (17713), 21 states have internal predecessors, (17713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1063.0) internal successors, (23386), 22 states have internal predecessors, (23386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,816 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1063.0) internal successors, (23386), 22 states have internal predecessors, (23386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,816 INFO L186 Difference]: Start difference. First operand has 941 places, 873 transitions, 1942 flow. Second operand 21 states and 17713 transitions. [2022-07-12 10:19:26,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 961 places, 897 transitions, 2188 flow [2022-07-12 10:19:26,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 897 transitions, 2174 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:26,826 INFO L242 Difference]: Finished difference. Result has 965 places, 886 transitions, 2066 flow [2022-07-12 10:19:26,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=940, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2066, PETRI_PLACES=965, PETRI_TRANSITIONS=886} [2022-07-12 10:19:26,827 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 25 predicate places. [2022-07-12 10:19:26,827 INFO L495 AbstractCegarLoop]: Abstraction has has 965 places, 886 transitions, 2066 flow [2022-07-12 10:19:26,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 842.6111111111111) internal successors, (15167), 18 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:26,830 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:26,830 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:26,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-07-12 10:19:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:27,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash 286763691, now seen corresponding path program 1 times [2022-07-12 10:19:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:27,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407891851] [2022-07-12 10:19:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:27,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:27,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407891851] [2022-07-12 10:19:27,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407891851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:27,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568366379] [2022-07-12 10:19:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:27,165 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:27,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-12 10:19:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:27,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:28,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568366379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:28,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:28,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376265930] [2022-07-12 10:19:28,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:28,193 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-12 10:19:28,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 965 places, 886 transitions, 2066 flow. Second operand has 34 states, 34 states have (on average 842.7941176470588) internal successors, (28655), 34 states have internal predecessors, (28655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:28,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:28,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-12 10:19:28,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:29,417 INFO L129 PetriNetUnfolder]: 0/1326 cut-off events. [2022-07-12 10:19:29,417 INFO L130 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-07-12 10:19:29,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1326 events. 0/1326 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4170 event pairs, 0 based on Foata normal form. 8/1334 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-07-12 10:19:29,420 INFO L132 encePairwiseOnDemand]: 1057/1063 looper letters, 64 selfloop transitions, 45 changer transitions 0/937 dead transitions. [2022-07-12 10:19:29,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1009 places, 937 transitions, 2600 flow [2022-07-12 10:19:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37917 transitions. [2022-07-12 10:19:29,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7926622765757291 [2022-07-12 10:19:29,436 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37917 transitions. [2022-07-12 10:19:29,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37917 transitions. [2022-07-12 10:19:29,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:29,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37917 transitions. [2022-07-12 10:19:29,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 842.6) internal successors, (37917), 45 states have internal predecessors, (37917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1063.0) internal successors, (48898), 46 states have internal predecessors, (48898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,496 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1063.0) internal successors, (48898), 46 states have internal predecessors, (48898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,496 INFO L186 Difference]: Start difference. First operand has 965 places, 886 transitions, 2066 flow. Second operand 45 states and 37917 transitions. [2022-07-12 10:19:29,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1009 places, 937 transitions, 2600 flow [2022-07-12 10:19:29,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1003 places, 937 transitions, 2560 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:29,510 INFO L242 Difference]: Finished difference. Result has 1012 places, 911 transitions, 2344 flow [2022-07-12 10:19:29,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=959, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=863, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2344, PETRI_PLACES=1012, PETRI_TRANSITIONS=911} [2022-07-12 10:19:29,511 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 72 predicate places. [2022-07-12 10:19:29,511 INFO L495 AbstractCegarLoop]: Abstraction has has 1012 places, 911 transitions, 2344 flow [2022-07-12 10:19:29,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 842.7941176470588) internal successors, (28655), 34 states have internal predecessors, (28655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:29,513 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:29,513 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:29,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-07-12 10:19:29,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:29,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1745244473, now seen corresponding path program 1 times [2022-07-12 10:19:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:29,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249231755] [2022-07-12 10:19:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:29,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:30,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:30,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249231755] [2022-07-12 10:19:30,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249231755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112019281] [2022-07-12 10:19:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:30,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:30,035 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:30,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-12 10:19:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:30,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:31,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112019281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:31,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:31,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:31,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342788568] [2022-07-12 10:19:31,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:31,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:31,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:31,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:31,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 840 out of 1063 [2022-07-12 10:19:31,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1012 places, 911 transitions, 2344 flow. Second operand has 66 states, 66 states have (on average 842.8939393939394) internal successors, (55631), 66 states have internal predecessors, (55631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:31,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:31,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 840 of 1063 [2022-07-12 10:19:31,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:33,860 INFO L129 PetriNetUnfolder]: 0/1118 cut-off events. [2022-07-12 10:19:33,861 INFO L130 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-07-12 10:19:33,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 1118 events. 0/1118 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2835 event pairs, 0 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2022-07-12 10:19:33,862 INFO L132 encePairwiseOnDemand]: 1058/1063 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-07-12 10:19:33,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 1000 transitions, 3462 flow [2022-07-12 10:19:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:19:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:19:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78320 transitions. [2022-07-12 10:19:33,892 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922394521490204 [2022-07-12 10:19:33,892 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78320 transitions. [2022-07-12 10:19:33,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78320 transitions. [2022-07-12 10:19:33,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:33,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78320 transitions. [2022-07-12 10:19:33,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 842.1505376344086) internal successors, (78320), 93 states have internal predecessors, (78320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:33,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1063.0) internal successors, (99922), 94 states have internal predecessors, (99922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,015 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1063.0) internal successors, (99922), 94 states have internal predecessors, (99922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,015 INFO L186 Difference]: Start difference. First operand has 1012 places, 911 transitions, 2344 flow. Second operand 93 states and 78320 transitions. [2022-07-12 10:19:34,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 1000 transitions, 3462 flow [2022-07-12 10:19:34,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-07-12 10:19:34,029 INFO L242 Difference]: Finished difference. Result has 1058 places, 943 transitions, 2703 flow [2022-07-12 10:19:34,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1063, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=2703, PETRI_PLACES=1058, PETRI_TRANSITIONS=943} [2022-07-12 10:19:34,030 INFO L279 CegarLoopForPetriNet]: 940 programPoint places, 118 predicate places. [2022-07-12 10:19:34,030 INFO L495 AbstractCegarLoop]: Abstraction has has 1058 places, 943 transitions, 2703 flow [2022-07-12 10:19:34,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 842.8939393939394) internal successors, (55631), 66 states have internal predecessors, (55631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:34,035 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:34,036 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:34,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-12 10:19:34,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-07-12 10:19:34,236 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash -368607812, now seen corresponding path program 1 times [2022-07-12 10:19:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:34,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488595327] [2022-07-12 10:19:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:34,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:34,281 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:34,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:34,377 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:34,377 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:34,377 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-07-12 10:19:34,378 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:34,378 WARN L231 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:34,378 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-07-12 10:19:34,434 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:34,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 969 places, 1096 transitions, 3277 flow [2022-07-12 10:19:35,332 INFO L129 PetriNetUnfolder]: 314/2300 cut-off events. [2022-07-12 10:19:35,332 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-12 10:19:35,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 2300 events. 314/2300 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8760 event pairs, 0 based on Foata normal form. 0/1922 useless extension candidates. Maximal degree in co-relation 2756. Up to 64 conditions per place. [2022-07-12 10:19:35,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 969 places, 1096 transitions, 3277 flow [2022-07-12 10:19:35,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 969 places, 1096 transitions, 3277 flow [2022-07-12 10:19:35,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:35,599 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:19:35,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:35,603 INFO L129 PetriNetUnfolder]: 4/88 cut-off events. [2022-07-12 10:19:35,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:35,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:35,603 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] [2022-07-12 10:19:35,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 601694695, now seen corresponding path program 1 times [2022-07-12 10:19:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:35,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674262909] [2022-07-12 10:19:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:35,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:35,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:35,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674262909] [2022-07-12 10:19:35,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674262909] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:35,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:35,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674920516] [2022-07-12 10:19:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:35,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:35,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 867 out of 1096 [2022-07-12 10:19:35,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1096 transitions, 3277 flow. Second operand has 3 states, 3 states have (on average 868.0) internal successors, (2604), 3 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:35,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:35,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 867 of 1096 [2022-07-12 10:19:35,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:36,638 INFO L129 PetriNetUnfolder]: 0/1929 cut-off events. [2022-07-12 10:19:36,639 INFO L130 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-07-12 10:19:36,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 1929 events. 0/1929 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8200 event pairs, 0 based on Foata normal form. 16734/18601 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2022-07-12 10:19:36,642 INFO L132 encePairwiseOnDemand]: 903/1096 looper letters, 40 selfloop transitions, 2 changer transitions 12/909 dead transitions. [2022-07-12 10:19:36,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 909 transitions, 2987 flow [2022-07-12 10:19:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2841 transitions. [2022-07-12 10:19:36,644 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8640510948905109 [2022-07-12 10:19:36,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2841 transitions. [2022-07-12 10:19:36,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2841 transitions. [2022-07-12 10:19:36,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:36,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2841 transitions. [2022-07-12 10:19:36,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 947.0) internal successors, (2841), 3 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1096.0) internal successors, (4384), 4 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1096.0) internal successors, (4384), 4 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,648 INFO L186 Difference]: Start difference. First operand has 969 places, 1096 transitions, 3277 flow. Second operand 3 states and 2841 transitions. [2022-07-12 10:19:36,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 909 transitions, 2987 flow [2022-07-12 10:19:36,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 909 transitions, 2057 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:36,663 INFO L242 Difference]: Finished difference. Result has 971 places, 894 transitions, 1953 flow [2022-07-12 10:19:36,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1953, PETRI_PLACES=971, PETRI_TRANSITIONS=894} [2022-07-12 10:19:36,664 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 2 predicate places. [2022-07-12 10:19:36,664 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 894 transitions, 1953 flow [2022-07-12 10:19:36,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 868.0) internal successors, (2604), 3 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:36,665 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:36,665 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] [2022-07-12 10:19:36,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-07-12 10:19:36,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash -796092704, now seen corresponding path program 1 times [2022-07-12 10:19:36,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:36,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854303557] [2022-07-12 10:19:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:36,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:36,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854303557] [2022-07-12 10:19:36,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854303557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793638389] [2022-07-12 10:19:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:36,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:36,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:36,697 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:36,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-12 10:19:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:37,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793638389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:37,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:37,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400771471] [2022-07-12 10:19:37,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:37,515 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-12 10:19:37,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 894 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 868.3) internal successors, (8683), 10 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:37,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:37,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-12 10:19:37,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:38,379 INFO L129 PetriNetUnfolder]: 0/1531 cut-off events. [2022-07-12 10:19:38,379 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-12 10:19:38,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1531 events. 0/1531 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5374 event pairs, 0 based on Foata normal form. 2/1533 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-07-12 10:19:38,382 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 41 selfloop transitions, 9 changer transitions 0/904 dead transitions. [2022-07-12 10:19:38,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 904 transitions, 2075 flow [2022-07-12 10:19:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7846 transitions. [2022-07-12 10:19:38,386 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7954176804541768 [2022-07-12 10:19:38,386 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7846 transitions. [2022-07-12 10:19:38,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7846 transitions. [2022-07-12 10:19:38,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:38,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7846 transitions. [2022-07-12 10:19:38,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 871.7777777777778) internal successors, (7846), 9 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1096.0) internal successors, (10960), 10 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,396 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1096.0) internal successors, (10960), 10 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,396 INFO L186 Difference]: Start difference. First operand has 971 places, 894 transitions, 1953 flow. Second operand 9 states and 7846 transitions. [2022-07-12 10:19:38,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 904 transitions, 2075 flow [2022-07-12 10:19:38,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 904 transitions, 2073 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:38,406 INFO L242 Difference]: Finished difference. Result has 969 places, 900 transitions, 2001 flow [2022-07-12 10:19:38,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=958, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2001, PETRI_PLACES=969, PETRI_TRANSITIONS=900} [2022-07-12 10:19:38,406 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 0 predicate places. [2022-07-12 10:19:38,407 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 900 transitions, 2001 flow [2022-07-12 10:19:38,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 868.3) internal successors, (8683), 10 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:38,407 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:38,407 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] [2022-07-12 10:19:38,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-07-12 10:19:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-07-12 10:19:38,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash -171585771, now seen corresponding path program 1 times [2022-07-12 10:19:38,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461001105] [2022-07-12 10:19:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461001105] [2022-07-12 10:19:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461001105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205936136] [2022-07-12 10:19:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:38,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:38,659 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-12 10:19:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:39,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:39,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:39,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205936136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:39,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:39,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:39,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411029696] [2022-07-12 10:19:39,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:39,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:39,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-12 10:19:39,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 900 transitions, 2001 flow. Second operand has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:39,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:39,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-12 10:19:39,538 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:40,429 INFO L129 PetriNetUnfolder]: 0/1479 cut-off events. [2022-07-12 10:19:40,430 INFO L130 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-07-12 10:19:40,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1479 events. 0/1479 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5042 event pairs, 0 based on Foata normal form. 4/1483 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-07-12 10:19:40,432 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 49 selfloop transitions, 21 changer transitions 0/924 dead transitions. [2022-07-12 10:19:40,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 989 places, 924 transitions, 2249 flow [2022-07-12 10:19:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18260 transitions. [2022-07-12 10:19:40,439 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7933611400764685 [2022-07-12 10:19:40,439 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18260 transitions. [2022-07-12 10:19:40,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18260 transitions. [2022-07-12 10:19:40,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:40,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18260 transitions. [2022-07-12 10:19:40,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 869.5238095238095) internal successors, (18260), 21 states have internal predecessors, (18260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:40,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1096.0) internal successors, (24112), 22 states have internal predecessors, (24112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:40,464 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1096.0) internal successors, (24112), 22 states have internal predecessors, (24112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:40,464 INFO L186 Difference]: Start difference. First operand has 969 places, 900 transitions, 2001 flow. Second operand 21 states and 18260 transitions. [2022-07-12 10:19:40,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 989 places, 924 transitions, 2249 flow [2022-07-12 10:19:40,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 924 transitions, 2235 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:40,476 INFO L242 Difference]: Finished difference. Result has 993 places, 913 transitions, 2125 flow [2022-07-12 10:19:40,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=968, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2125, PETRI_PLACES=993, PETRI_TRANSITIONS=913} [2022-07-12 10:19:40,477 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 24 predicate places. [2022-07-12 10:19:40,477 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 913 transitions, 2125 flow [2022-07-12 10:19:40,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 868.6111111111111) internal successors, (15635), 18 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:40,479 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:40,479 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:40,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-07-12 10:19:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:40,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1582942837, now seen corresponding path program 1 times [2022-07-12 10:19:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:40,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851428285] [2022-07-12 10:19:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:40,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851428285] [2022-07-12 10:19:40,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851428285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818939159] [2022-07-12 10:19:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:40,806 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:40,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-12 10:19:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:41,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:41,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818939159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:41,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:41,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741597444] [2022-07-12 10:19:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:41,879 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-12 10:19:41,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 913 transitions, 2125 flow. Second operand has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:41,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:41,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-12 10:19:41,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:43,177 INFO L129 PetriNetUnfolder]: 0/1375 cut-off events. [2022-07-12 10:19:43,177 INFO L130 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-07-12 10:19:43,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 1375 events. 0/1375 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4351 event pairs, 0 based on Foata normal form. 8/1383 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-07-12 10:19:43,180 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 65 selfloop transitions, 45 changer transitions 0/964 dead transitions. [2022-07-12 10:19:43,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 964 transitions, 2661 flow [2022-07-12 10:19:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 39088 transitions. [2022-07-12 10:19:43,195 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7925385239253853 [2022-07-12 10:19:43,195 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 39088 transitions. [2022-07-12 10:19:43,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 39088 transitions. [2022-07-12 10:19:43,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:43,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 39088 transitions. [2022-07-12 10:19:43,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 868.6222222222223) internal successors, (39088), 45 states have internal predecessors, (39088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,258 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1096.0) internal successors, (50416), 46 states have internal predecessors, (50416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,258 INFO L186 Difference]: Start difference. First operand has 993 places, 913 transitions, 2125 flow. Second operand 45 states and 39088 transitions. [2022-07-12 10:19:43,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 964 transitions, 2661 flow [2022-07-12 10:19:43,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 964 transitions, 2621 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:43,272 INFO L242 Difference]: Finished difference. Result has 1040 places, 938 transitions, 2403 flow [2022-07-12 10:19:43,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2403, PETRI_PLACES=1040, PETRI_TRANSITIONS=938} [2022-07-12 10:19:43,273 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 71 predicate places. [2022-07-12 10:19:43,273 INFO L495 AbstractCegarLoop]: Abstraction has has 1040 places, 938 transitions, 2403 flow [2022-07-12 10:19:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 868.7941176470588) internal successors, (29539), 34 states have internal predecessors, (29539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:43,278 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:43,278 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:43,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:43,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:43,491 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 294994599, now seen corresponding path program 1 times [2022-07-12 10:19:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:43,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945195187] [2022-07-12 10:19:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:43,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:43,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945195187] [2022-07-12 10:19:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945195187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008448930] [2022-07-12 10:19:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:43,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:43,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:43,835 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:43,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-12 10:19:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:45,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008448930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:45,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:45,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587998639] [2022-07-12 10:19:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:45,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:45,537 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 866 out of 1096 [2022-07-12 10:19:45,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1040 places, 938 transitions, 2403 flow. Second operand has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:45,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:45,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 866 of 1096 [2022-07-12 10:19:45,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:47,685 INFO L129 PetriNetUnfolder]: 0/1167 cut-off events. [2022-07-12 10:19:47,685 INFO L130 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-07-12 10:19:47,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 1167 events. 0/1167 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2991 event pairs, 0 based on Foata normal form. 16/1183 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-07-12 10:19:47,687 INFO L132 encePairwiseOnDemand]: 1090/1096 looper letters, 97 selfloop transitions, 93 changer transitions 0/1044 dead transitions. [2022-07-12 10:19:47,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 1044 transitions, 3631 flow [2022-07-12 10:19:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:19:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:19:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80744 transitions. [2022-07-12 10:19:47,716 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7921670198571541 [2022-07-12 10:19:47,716 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80744 transitions. [2022-07-12 10:19:47,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80744 transitions. [2022-07-12 10:19:47,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:47,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80744 transitions. [2022-07-12 10:19:47,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 868.2150537634409) internal successors, (80744), 93 states have internal predecessors, (80744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:47,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:47,841 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1096.0) internal successors, (103024), 94 states have internal predecessors, (103024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:47,841 INFO L186 Difference]: Start difference. First operand has 1040 places, 938 transitions, 2403 flow. Second operand 93 states and 80744 transitions. [2022-07-12 10:19:47,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 1044 transitions, 3631 flow [2022-07-12 10:19:47,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1114 places, 1044 transitions, 3543 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-12 10:19:47,857 INFO L242 Difference]: Finished difference. Result has 1131 places, 987 transitions, 3037 flow [2022-07-12 10:19:47,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1096, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=1022, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3037, PETRI_PLACES=1131, PETRI_TRANSITIONS=987} [2022-07-12 10:19:47,858 INFO L279 CegarLoopForPetriNet]: 969 programPoint places, 162 predicate places. [2022-07-12 10:19:47,858 INFO L495 AbstractCegarLoop]: Abstraction has has 1131 places, 987 transitions, 3037 flow [2022-07-12 10:19:47,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 868.8939393939394) internal successors, (57347), 66 states have internal predecessors, (57347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:47,864 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:47,864 INFO L200 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:47,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-07-12 10:19:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-07-12 10:19:48,065 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 323483123, now seen corresponding path program 1 times [2022-07-12 10:19:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:48,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794525771] [2022-07-12 10:19:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:48,107 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:19:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:19:48,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:19:48,184 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:19:48,184 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:19:48,184 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:19:48,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2022-07-12 10:19:48,184 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:19:48,185 WARN L231 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:19:48,185 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-07-12 10:19:48,238 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:19:48,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 998 places, 1129 transitions, 3410 flow [2022-07-12 10:19:49,167 INFO L129 PetriNetUnfolder]: 324/2372 cut-off events. [2022-07-12 10:19:49,167 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-12 10:19:49,486 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 2372 events. 324/2372 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9000 event pairs, 0 based on Foata normal form. 0/1982 useless extension candidates. Maximal degree in co-relation 2862. Up to 66 conditions per place. [2022-07-12 10:19:49,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 998 places, 1129 transitions, 3410 flow [2022-07-12 10:19:49,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 998 places, 1129 transitions, 3410 flow [2022-07-12 10:19:49,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:19:49,531 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:19:49,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:19:49,535 INFO L129 PetriNetUnfolder]: 5/91 cut-off events. [2022-07-12 10:19:49,535 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:19:49,535 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:49,535 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] [2022-07-12 10:19:49,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1903437767, now seen corresponding path program 1 times [2022-07-12 10:19:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:49,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395209467] [2022-07-12 10:19:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395209467] [2022-07-12 10:19:49,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395209467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:19:49,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:19:49,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:19:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145196969] [2022-07-12 10:19:49,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:19:49,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:19:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:19:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:19:49,559 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 893 out of 1129 [2022-07-12 10:19:49,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 1129 transitions, 3410 flow. Second operand has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:49,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:49,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 893 of 1129 [2022-07-12 10:19:49,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:50,679 INFO L129 PetriNetUnfolder]: 0/1990 cut-off events. [2022-07-12 10:19:50,679 INFO L130 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-07-12 10:19:50,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1990 events. 0/1990 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8506 event pairs, 0 based on Foata normal form. 17849/19775 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-07-12 10:19:50,683 INFO L132 encePairwiseOnDemand]: 930/1129 looper letters, 41 selfloop transitions, 2 changer transitions 12/936 dead transitions. [2022-07-12 10:19:50,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 999 places, 936 transitions, 3110 flow [2022-07-12 10:19:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:19:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:19:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2926 transitions. [2022-07-12 10:19:50,685 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.863891349276646 [2022-07-12 10:19:50,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2926 transitions. [2022-07-12 10:19:50,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2926 transitions. [2022-07-12 10:19:50,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:50,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2926 transitions. [2022-07-12 10:19:50,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 975.3333333333334) internal successors, (2926), 3 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:50,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:50,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1129.0) internal successors, (4516), 4 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:50,689 INFO L186 Difference]: Start difference. First operand has 998 places, 1129 transitions, 3410 flow. Second operand 3 states and 2926 transitions. [2022-07-12 10:19:50,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 999 places, 936 transitions, 3110 flow [2022-07-12 10:19:50,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 999 places, 936 transitions, 2118 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-07-12 10:19:50,706 INFO L242 Difference]: Finished difference. Result has 1000 places, 921 transitions, 2012 flow [2022-07-12 10:19:50,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2012, PETRI_PLACES=1000, PETRI_TRANSITIONS=921} [2022-07-12 10:19:50,707 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 2 predicate places. [2022-07-12 10:19:50,707 INFO L495 AbstractCegarLoop]: Abstraction has has 1000 places, 921 transitions, 2012 flow [2022-07-12 10:19:50,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 894.0) internal successors, (2682), 3 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:50,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:50,708 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] [2022-07-12 10:19:50,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2022-07-12 10:19:50,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash 774696576, now seen corresponding path program 1 times [2022-07-12 10:19:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:50,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548575373] [2022-07-12 10:19:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:50,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:50,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548575373] [2022-07-12 10:19:50,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548575373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:50,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246039704] [2022-07-12 10:19:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:50,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:50,738 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-12 10:19:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:19:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:51,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:51,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246039704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:51,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:51,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:19:51,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450330097] [2022-07-12 10:19:51,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:51,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:19:51,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:51,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:19:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:19:51,569 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-12 10:19:51,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1000 places, 921 transitions, 2012 flow. Second operand has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:51,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:51,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-12 10:19:51,571 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:52,475 INFO L129 PetriNetUnfolder]: 0/1580 cut-off events. [2022-07-12 10:19:52,476 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-12 10:19:52,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1580 events. 0/1580 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5561 event pairs, 0 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-07-12 10:19:52,478 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 42 selfloop transitions, 9 changer transitions 0/931 dead transitions. [2022-07-12 10:19:52,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 996 places, 931 transitions, 2136 flow [2022-07-12 10:19:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:19:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:19:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8081 transitions. [2022-07-12 10:19:52,481 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7952957386084046 [2022-07-12 10:19:52,481 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8081 transitions. [2022-07-12 10:19:52,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8081 transitions. [2022-07-12 10:19:52,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:52,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8081 transitions. [2022-07-12 10:19:52,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 897.8888888888889) internal successors, (8081), 9 states have internal predecessors, (8081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:52,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:52,491 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1129.0) internal successors, (11290), 10 states have internal predecessors, (11290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:52,491 INFO L186 Difference]: Start difference. First operand has 1000 places, 921 transitions, 2012 flow. Second operand 9 states and 8081 transitions. [2022-07-12 10:19:52,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 996 places, 931 transitions, 2136 flow [2022-07-12 10:19:52,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 931 transitions, 2134 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:52,500 INFO L242 Difference]: Finished difference. Result has 998 places, 927 transitions, 2060 flow [2022-07-12 10:19:52,500 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=987, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2060, PETRI_PLACES=998, PETRI_TRANSITIONS=927} [2022-07-12 10:19:52,501 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 0 predicate places. [2022-07-12 10:19:52,501 INFO L495 AbstractCegarLoop]: Abstraction has has 998 places, 927 transitions, 2060 flow [2022-07-12 10:19:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 894.3) internal successors, (8943), 10 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:52,501 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:52,502 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] [2022-07-12 10:19:52,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-07-12 10:19:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:52,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1043544629, now seen corresponding path program 1 times [2022-07-12 10:19:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:52,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358912072] [2022-07-12 10:19:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358912072] [2022-07-12 10:19:52,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358912072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:52,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155930231] [2022-07-12 10:19:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:52,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:52,764 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:52,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-12 10:19:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:19:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:53,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155930231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:53,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:53,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:19:53,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239874425] [2022-07-12 10:19:53,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:53,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:19:53,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:53,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:19:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:19:53,664 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-12 10:19:53,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 998 places, 927 transitions, 2060 flow. Second operand has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:53,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:53,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-12 10:19:53,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:54,668 INFO L129 PetriNetUnfolder]: 0/1528 cut-off events. [2022-07-12 10:19:54,668 INFO L130 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-07-12 10:19:54,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 1528 events. 0/1528 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5223 event pairs, 0 based on Foata normal form. 4/1532 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-07-12 10:19:54,672 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 50 selfloop transitions, 21 changer transitions 0/951 dead transitions. [2022-07-12 10:19:54,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1018 places, 951 transitions, 2310 flow [2022-07-12 10:19:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 10:19:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-12 10:19:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18807 transitions. [2022-07-12 10:19:54,683 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.793243072251044 [2022-07-12 10:19:54,684 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18807 transitions. [2022-07-12 10:19:54,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18807 transitions. [2022-07-12 10:19:54,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:54,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18807 transitions. [2022-07-12 10:19:54,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 895.5714285714286) internal successors, (18807), 21 states have internal predecessors, (18807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,721 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1129.0) internal successors, (24838), 22 states have internal predecessors, (24838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,721 INFO L186 Difference]: Start difference. First operand has 998 places, 927 transitions, 2060 flow. Second operand 21 states and 18807 transitions. [2022-07-12 10:19:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1018 places, 951 transitions, 2310 flow [2022-07-12 10:19:54,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1017 places, 951 transitions, 2296 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:19:54,736 INFO L242 Difference]: Finished difference. Result has 1022 places, 940 transitions, 2184 flow [2022-07-12 10:19:54,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2184, PETRI_PLACES=1022, PETRI_TRANSITIONS=940} [2022-07-12 10:19:54,737 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 24 predicate places. [2022-07-12 10:19:54,737 INFO L495 AbstractCegarLoop]: Abstraction has has 1022 places, 940 transitions, 2184 flow [2022-07-12 10:19:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 894.6111111111111) internal successors, (16103), 18 states have internal predecessors, (16103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:54,739 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:54,739 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:54,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-07-12 10:19:54,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:54,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1608022101, now seen corresponding path program 1 times [2022-07-12 10:19:54,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942581881] [2022-07-12 10:19:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:55,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942581881] [2022-07-12 10:19:55,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942581881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350061920] [2022-07-12 10:19:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:55,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:55,083 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-07-12 10:19:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:19:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:55,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:56,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350061920] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:56,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:56,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-12 10:19:56,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388802494] [2022-07-12 10:19:56,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:56,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 10:19:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 10:19:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 10:19:56,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-12 10:19:56,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1022 places, 940 transitions, 2184 flow. Second operand has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:56,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:56,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-12 10:19:56,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:19:57,508 INFO L129 PetriNetUnfolder]: 0/1424 cut-off events. [2022-07-12 10:19:57,508 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-07-12 10:19:57,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 1424 events. 0/1424 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4537 event pairs, 0 based on Foata normal form. 8/1432 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-07-12 10:19:57,511 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 66 selfloop transitions, 45 changer transitions 0/991 dead transitions. [2022-07-12 10:19:57,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1066 places, 991 transitions, 2722 flow [2022-07-12 10:19:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 10:19:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-12 10:19:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40259 transitions. [2022-07-12 10:19:57,525 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7924220057080996 [2022-07-12 10:19:57,526 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40259 transitions. [2022-07-12 10:19:57,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40259 transitions. [2022-07-12 10:19:57,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:19:57,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40259 transitions. [2022-07-12 10:19:57,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 894.6444444444444) internal successors, (40259), 45 states have internal predecessors, (40259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:57,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:57,588 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1129.0) internal successors, (51934), 46 states have internal predecessors, (51934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:57,588 INFO L186 Difference]: Start difference. First operand has 1022 places, 940 transitions, 2184 flow. Second operand 45 states and 40259 transitions. [2022-07-12 10:19:57,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1066 places, 991 transitions, 2722 flow [2022-07-12 10:19:57,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1060 places, 991 transitions, 2682 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-12 10:19:57,600 INFO L242 Difference]: Finished difference. Result has 1069 places, 965 transitions, 2462 flow [2022-07-12 10:19:57,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2462, PETRI_PLACES=1069, PETRI_TRANSITIONS=965} [2022-07-12 10:19:57,601 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 71 predicate places. [2022-07-12 10:19:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 1069 places, 965 transitions, 2462 flow [2022-07-12 10:19:57,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 894.7941176470588) internal successors, (30423), 34 states have internal predecessors, (30423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:57,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:19:57,604 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:19:57,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-07-12 10:19:57,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-07-12 10:19:57,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:19:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:19:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 312828615, now seen corresponding path program 1 times [2022-07-12 10:19:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:19:57,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992019121] [2022-07-12 10:19:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:19:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:58,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:19:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992019121] [2022-07-12 10:19:58,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992019121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:19:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349421514] [2022-07-12 10:19:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:19:58,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:19:58,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:19:58,129 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:19:58,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-07-12 10:19:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:19:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 10:19:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:19:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:59,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:19:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:19:59,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349421514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:19:59,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:19:59,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-12 10:19:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054356343] [2022-07-12 10:19:59,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:19:59,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 10:19:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:19:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 10:19:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 10:19:59,931 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-12 10:19:59,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 965 transitions, 2462 flow. Second operand has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:19:59,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:19:59,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-12 10:19:59,948 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:02,174 INFO L129 PetriNetUnfolder]: 0/1216 cut-off events. [2022-07-12 10:20:02,174 INFO L130 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-07-12 10:20:02,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 1216 events. 0/1216 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3174 event pairs, 0 based on Foata normal form. 16/1232 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-12 10:20:02,177 INFO L132 encePairwiseOnDemand]: 1123/1129 looper letters, 98 selfloop transitions, 93 changer transitions 0/1071 dead transitions. [2022-07-12 10:20:02,177 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1161 places, 1071 transitions, 3692 flow [2022-07-12 10:20:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-12 10:20:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-12 10:20:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 83163 transitions. [2022-07-12 10:20:02,206 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.792051201462899 [2022-07-12 10:20:02,207 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 83163 transitions. [2022-07-12 10:20:02,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 83163 transitions. [2022-07-12 10:20:02,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:02,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 83163 transitions. [2022-07-12 10:20:02,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 894.2258064516129) internal successors, (83163), 93 states have internal predecessors, (83163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,335 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1129.0) internal successors, (106126), 94 states have internal predecessors, (106126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,335 INFO L186 Difference]: Start difference. First operand has 1069 places, 965 transitions, 2462 flow. Second operand 93 states and 83163 transitions. [2022-07-12 10:20:02,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1161 places, 1071 transitions, 3692 flow [2022-07-12 10:20:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1143 places, 1071 transitions, 3604 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-12 10:20:02,352 INFO L242 Difference]: Finished difference. Result has 1160 places, 1014 transitions, 3096 flow [2022-07-12 10:20:02,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=1051, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3096, PETRI_PLACES=1160, PETRI_TRANSITIONS=1014} [2022-07-12 10:20:02,353 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 162 predicate places. [2022-07-12 10:20:02,353 INFO L495 AbstractCegarLoop]: Abstraction has has 1160 places, 1014 transitions, 3096 flow [2022-07-12 10:20:02,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 894.8939393939394) internal successors, (59063), 66 states have internal predecessors, (59063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:02,358 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:02,358 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:02,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-07-12 10:20:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-07-12 10:20:02,559 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash -256812609, now seen corresponding path program 1 times [2022-07-12 10:20:02,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:02,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077774251] [2022-07-12 10:20:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:02,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:03,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077774251] [2022-07-12 10:20:03,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077774251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944217000] [2022-07-12 10:20:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:03,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:03,643 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:20:03,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-07-12 10:20:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:04,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-12 10:20:04,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:04,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:07,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944217000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:07,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:07,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-12 10:20:07,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864859744] [2022-07-12 10:20:07,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:07,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-12 10:20:07,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-12 10:20:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-12 10:20:07,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 892 out of 1129 [2022-07-12 10:20:07,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1160 places, 1014 transitions, 3096 flow. Second operand has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:07,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:07,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 892 of 1129 [2022-07-12 10:20:07,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:10,152 INFO L129 PetriNetUnfolder]: 0/1190 cut-off events. [2022-07-12 10:20:10,153 INFO L130 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-07-12 10:20:10,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-07-12 10:20:10,155 INFO L132 encePairwiseOnDemand]: 1124/1129 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-07-12 10:20:10,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 1064 transitions, 3872 flow [2022-07-12 10:20:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-12 10:20:10,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-07-12 10:20:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88506 transitions. [2022-07-12 10:20:10,191 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.79185119574845 [2022-07-12 10:20:10,191 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88506 transitions. [2022-07-12 10:20:10,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88506 transitions. [2022-07-12 10:20:10,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:10,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88506 transitions. [2022-07-12 10:20:10,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 894.0) internal successors, (88506), 99 states have internal predecessors, (88506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:10,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:10,334 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1129.0) internal successors, (112900), 100 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:10,334 INFO L186 Difference]: Start difference. First operand has 1160 places, 1014 transitions, 3096 flow. Second operand 99 states and 88506 transitions. [2022-07-12 10:20:10,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 1064 transitions, 3872 flow [2022-07-12 10:20:10,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-07-12 10:20:10,353 INFO L242 Difference]: Finished difference. Result has 1172 places, 1004 transitions, 2970 flow [2022-07-12 10:20:10,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1129, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1074, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1172, PETRI_TRANSITIONS=1004} [2022-07-12 10:20:10,354 INFO L279 CegarLoopForPetriNet]: 998 programPoint places, 174 predicate places. [2022-07-12 10:20:10,354 INFO L495 AbstractCegarLoop]: Abstraction has has 1172 places, 1004 transitions, 2970 flow [2022-07-12 10:20:10,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 894.9461538461538) internal successors, (116343), 130 states have internal predecessors, (116343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:10,365 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:10,365 INFO L200 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:10,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-07-12 10:20:10,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-07-12 10:20:10,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash -320541493, now seen corresponding path program 1 times [2022-07-12 10:20:10,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:10,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817589419] [2022-07-12 10:20:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:20:10,609 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:20:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:20:10,719 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:20:10,719 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:20:10,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:20:10,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:20:10,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2022-07-12 10:20:10,720 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:10,720 WARN L231 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:20:10,720 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-07-12 10:20:10,780 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-12 10:20:10,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1027 places, 1162 transitions, 3545 flow [2022-07-12 10:20:11,998 INFO L129 PetriNetUnfolder]: 334/2444 cut-off events. [2022-07-12 10:20:11,998 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-12 10:20:12,195 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 2444 events. 334/2444 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9259 event pairs, 0 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 2969. Up to 68 conditions per place. [2022-07-12 10:20:12,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 1027 places, 1162 transitions, 3545 flow [2022-07-12 10:20:12,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1027 places, 1162 transitions, 3545 flow [2022-07-12 10:20:12,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:20:12,277 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@37bcafae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c372b75 [2022-07-12 10:20:12,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:20:12,281 INFO L129 PetriNetUnfolder]: 4/91 cut-off events. [2022-07-12 10:20:12,281 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:20:12,281 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:12,281 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] [2022-07-12 10:20:12,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:12,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:12,281 INFO L85 PathProgramCache]: Analyzing trace with hash 648750215, now seen corresponding path program 1 times [2022-07-12 10:20:12,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:12,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574756026] [2022-07-12 10:20:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:12,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:12,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:12,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574756026] [2022-07-12 10:20:12,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574756026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:12,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:12,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:20:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245310153] [2022-07-12 10:20:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:12,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:20:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:20:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:20:12,307 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 919 out of 1162 [2022-07-12 10:20:12,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:12,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:12,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 919 of 1162 [2022-07-12 10:20:12,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:13,608 INFO L129 PetriNetUnfolder]: 0/2051 cut-off events. [2022-07-12 10:20:13,608 INFO L130 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-07-12 10:20:13,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 2051 events. 0/2051 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 8779 event pairs, 0 based on Foata normal form. 19000/20985 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-07-12 10:20:13,611 INFO L132 encePairwiseOnDemand]: 957/1162 looper letters, 42 selfloop transitions, 2 changer transitions 12/963 dead transitions. [2022-07-12 10:20:13,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 963 transitions, 3235 flow [2022-07-12 10:20:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:20:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:20:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3011 transitions. [2022-07-12 10:20:13,613 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8637406769936891 [2022-07-12 10:20:13,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3011 transitions. [2022-07-12 10:20:13,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3011 transitions. [2022-07-12 10:20:13,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:13,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3011 transitions. [2022-07-12 10:20:13,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1003.6666666666666) internal successors, (3011), 3 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:13,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:13,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1162.0) internal successors, (4648), 4 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:13,617 INFO L186 Difference]: Start difference. First operand has 1027 places, 1162 transitions, 3545 flow. Second operand 3 states and 3011 transitions. [2022-07-12 10:20:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 963 transitions, 3235 flow [2022-07-12 10:20:13,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 963 transitions, 2179 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-07-12 10:20:13,632 INFO L242 Difference]: Finished difference. Result has 1029 places, 948 transitions, 2071 flow [2022-07-12 10:20:13,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=1026, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2071, PETRI_PLACES=1029, PETRI_TRANSITIONS=948} [2022-07-12 10:20:13,633 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 2 predicate places. [2022-07-12 10:20:13,633 INFO L495 AbstractCegarLoop]: Abstraction has has 1029 places, 948 transitions, 2071 flow [2022-07-12 10:20:13,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 920.0) internal successors, (2760), 3 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:13,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:13,634 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] [2022-07-12 10:20:13,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2022-07-12 10:20:13,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1321003424, now seen corresponding path program 1 times [2022-07-12 10:20:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512559971] [2022-07-12 10:20:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:13,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:13,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:13,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512559971] [2022-07-12 10:20:13,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512559971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:13,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709979810] [2022-07-12 10:20:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:13,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:13,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:13,674 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:20:13,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-07-12 10:20:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:14,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:20:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:14,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:14,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709979810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:14,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:14,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:20:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437147597] [2022-07-12 10:20:14,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:14,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:20:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:20:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:20:14,553 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-12 10:20:14,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1029 places, 948 transitions, 2071 flow. Second operand has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:14,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:14,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-12 10:20:14,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:15,563 INFO L129 PetriNetUnfolder]: 0/1629 cut-off events. [2022-07-12 10:20:15,563 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-07-12 10:20:15,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 1629 events. 0/1629 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5737 event pairs, 0 based on Foata normal form. 2/1631 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-07-12 10:20:15,566 INFO L132 encePairwiseOnDemand]: 1156/1162 looper letters, 43 selfloop transitions, 9 changer transitions 0/958 dead transitions. [2022-07-12 10:20:15,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 958 transitions, 2197 flow [2022-07-12 10:20:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:20:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:20:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8316 transitions. [2022-07-12 10:20:15,570 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7951807228915663 [2022-07-12 10:20:15,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8316 transitions. [2022-07-12 10:20:15,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8316 transitions. [2022-07-12 10:20:15,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:15,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8316 transitions. [2022-07-12 10:20:15,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 924.0) internal successors, (8316), 9 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:15,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:15,581 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1162.0) internal successors, (11620), 10 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:15,581 INFO L186 Difference]: Start difference. First operand has 1029 places, 948 transitions, 2071 flow. Second operand 9 states and 8316 transitions. [2022-07-12 10:20:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 958 transitions, 2197 flow [2022-07-12 10:20:15,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 958 transitions, 2195 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:20:15,593 INFO L242 Difference]: Finished difference. Result has 1027 places, 954 transitions, 2119 flow [2022-07-12 10:20:15,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1162, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2119, PETRI_PLACES=1027, PETRI_TRANSITIONS=954} [2022-07-12 10:20:15,594 INFO L279 CegarLoopForPetriNet]: 1027 programPoint places, 0 predicate places. [2022-07-12 10:20:15,594 INFO L495 AbstractCegarLoop]: Abstraction has has 1027 places, 954 transitions, 2119 flow [2022-07-12 10:20:15,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 920.3) internal successors, (9203), 10 states have internal predecessors, (9203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:15,595 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:15,595 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] [2022-07-12 10:20:15,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-07-12 10:20:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:15,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:20:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash 126077461, now seen corresponding path program 1 times [2022-07-12 10:20:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547226755] [2022-07-12 10:20:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:15,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:15,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547226755] [2022-07-12 10:20:15,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547226755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345289281] [2022-07-12 10:20:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:15,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:15,864 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:20:15,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-07-12 10:20:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:16,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:20:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:16,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345289281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:16,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:16,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:20:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400409006] [2022-07-12 10:20:16,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:20:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:20:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:20:16,823 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 918 out of 1162 [2022-07-12 10:20:16,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1027 places, 954 transitions, 2119 flow. Second operand has 18 states, 18 states have (on average 920.6111111111111) internal successors, (16571), 18 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:20:16,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:16,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 918 of 1162 [2022-07-12 10:20:16,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand