./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:23:10,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:23:10,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:23:10,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:23:10,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:23:10,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:23:10,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:23:10,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:23:10,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:23:10,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:23:10,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:23:10,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:23:10,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:23:10,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:23:10,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:23:10,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:23:10,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:23:10,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:23:10,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:23:10,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:23:10,380 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:23:10,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:23:10,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:23:10,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:23:10,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:23:10,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:23:10,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:23:10,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:23:10,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:23:10,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:23:10,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:23:10,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:23:10,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:23:10,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:23:10,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:23:10,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:23:10,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:23:10,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:23:10,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:23:10,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:23:10,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:23:10,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:23:10,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:23:10,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:23:10,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:23:10,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:23:10,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:23:10,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:23:10,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:23:10,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:23:10,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:23:10,420 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:23:10,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:23:10,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:23:10,422 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:23:10,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:23:10,422 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:23:10,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:23:10,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:23:10,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:23:10,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:23:10,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:23:10,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:23:10,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:23:10,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:23:10,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:23:10,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:23:10,424 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:23:10,424 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:23:10,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:23:10,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2022-07-19 21:23:10,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:23:10,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:23:10,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:23:10,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:23:10,655 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:23:10,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-19 21:23:10,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e86a142/d910e05084594f4db54ff94afb454486/FLAGeb1fdc37a [2022-07-19 21:23:11,068 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:23:11,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-19 21:23:11,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e86a142/d910e05084594f4db54ff94afb454486/FLAGeb1fdc37a [2022-07-19 21:23:11,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e86a142/d910e05084594f4db54ff94afb454486 [2022-07-19 21:23:11,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:23:11,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:23:11,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:23:11,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:23:11,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:23:11,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad87eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11, skipping insertion in model container [2022-07-19 21:23:11,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:23:11,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:23:11,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-19 21:23:11,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:23:11,270 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:23:11,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-19 21:23:11,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:23:11,296 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:23:11,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11 WrapperNode [2022-07-19 21:23:11,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:23:11,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:23:11,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:23:11,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:23:11,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,321 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-07-19 21:23:11,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:23:11,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:23:11,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:23:11,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:23:11,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:23:11,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:23:11,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:23:11,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:23:11,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (1/1) ... [2022-07-19 21:23:11,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:23:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:11,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:23:11,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:23:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:23:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:23:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:23:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:23:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-19 21:23:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-19 21:23:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-07-19 21:23:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:23:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:23:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:23:11,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:23:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:23:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:23:11,477 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:23:11,599 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:23:11,600 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:23:11,856 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:23:11,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:23:11,863 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:23:11,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:23:11 BoogieIcfgContainer [2022-07-19 21:23:11,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:23:11,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:23:11,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:23:11,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:23:11,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:23:11" (1/3) ... [2022-07-19 21:23:11,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b07192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:23:11, skipping insertion in model container [2022-07-19 21:23:11,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:23:11" (2/3) ... [2022-07-19 21:23:11,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b07192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:23:11, skipping insertion in model container [2022-07-19 21:23:11,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:23:11" (3/3) ... [2022-07-19 21:23:11,872 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2022-07-19 21:23:11,876 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:23:11,883 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:23:11,884 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:23:11,884 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:23:11,936 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 21:23:11,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-07-19 21:23:12,007 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-19 21:23:12,007 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:23:12,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-07-19 21:23:12,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2022-07-19 21:23:12,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2022-07-19 21:23:12,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:23:12,030 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@1e65340, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@746f1369 [2022-07-19 21:23:12,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:23:12,050 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2022-07-19 21:23:12,050 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:23:12,050 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:12,051 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:12,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1805930400, now seen corresponding path program 1 times [2022-07-19 21:23:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:12,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103345733] [2022-07-19 21:23:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:12,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:12,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103345733] [2022-07-19 21:23:12,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103345733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:12,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:12,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:23:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678490242] [2022-07-19 21:23:12,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:12,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:23:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:12,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:23:12,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:23:12,289 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2022-07-19 21:23:12,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:12,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:12,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2022-07-19 21:23:12,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:12,333 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2022-07-19 21:23:12,334 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-19 21:23:12,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2022-07-19 21:23:12,336 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2022-07-19 21:23:12,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2022-07-19 21:23:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:23:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:23:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2022-07-19 21:23:12,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2022-07-19 21:23:12,351 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2022-07-19 21:23:12,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2022-07-19 21:23:12,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:12,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2022-07-19 21:23:12,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:12,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:12,373 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:12,375 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2022-07-19 21:23:12,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2022-07-19 21:23:12,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-07-19 21:23:12,381 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2022-07-19 21:23:12,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2022-07-19 21:23:12,386 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2022-07-19 21:23:12,386 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2022-07-19 21:23:12,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:12,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:12,387 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:12,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:23:12,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:12,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1921476920, now seen corresponding path program 1 times [2022-07-19 21:23:12,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515353731] [2022-07-19 21:23:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:12,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:12,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515353731] [2022-07-19 21:23:12,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515353731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:12,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:12,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:23:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620162233] [2022-07-19 21:23:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:12,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:23:12,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:23:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:23:12,942 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2022-07-19 21:23:12,943 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:12,943 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:12,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2022-07-19 21:23:12,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:14,746 INFO L129 PetriNetUnfolder]: 13855/19787 cut-off events. [2022-07-19 21:23:14,747 INFO L130 PetriNetUnfolder]: For 728/1092 co-relation queries the response was YES. [2022-07-19 21:23:14,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37307 conditions, 19787 events. 13855/19787 cut-off events. For 728/1092 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 113995 event pairs, 8752 based on Foata normal form. 1/13828 useless extension candidates. Maximal degree in co-relation 37304. Up to 10952 conditions per place. [2022-07-19 21:23:14,972 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2022-07-19 21:23:14,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2022-07-19 21:23:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:23:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:23:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2022-07-19 21:23:14,977 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2022-07-19 21:23:14,977 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2022-07-19 21:23:14,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2022-07-19 21:23:14,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:14,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2022-07-19 21:23:14,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:15,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:15,002 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:15,003 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2022-07-19 21:23:15,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2022-07-19 21:23:15,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:23:15,010 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2022-07-19 21:23:15,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2022-07-19 21:23:15,011 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2022-07-19 21:23:15,012 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2022-07-19 21:23:15,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:15,012 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:15,013 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:15,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:23:15,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash 856396636, now seen corresponding path program 1 times [2022-07-19 21:23:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204583238] [2022-07-19 21:23:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:15,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:15,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204583238] [2022-07-19 21:23:15,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204583238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:23:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344290457] [2022-07-19 21:23:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:15,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:23:15,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:15,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:23:15,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:23:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:23:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:23:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:16,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:23:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:16,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344290457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:23:16,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:23:16,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-19 21:23:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984267353] [2022-07-19 21:23:16,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:23:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:23:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:23:16,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:23:16,253 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-19 21:23:16,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:16,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:16,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-19 21:23:16,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:19,443 INFO L129 PetriNetUnfolder]: 27630/39510 cut-off events. [2022-07-19 21:23:19,444 INFO L130 PetriNetUnfolder]: For 8413/8511 co-relation queries the response was YES. [2022-07-19 21:23:19,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87882 conditions, 39510 events. 27630/39510 cut-off events. For 8413/8511 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 252409 event pairs, 4983 based on Foata normal form. 0/28288 useless extension candidates. Maximal degree in co-relation 87875. Up to 10656 conditions per place. [2022-07-19 21:23:19,888 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 207 selfloop transitions, 30 changer transitions 1/322 dead transitions. [2022-07-19 21:23:19,888 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 1316 flow [2022-07-19 21:23:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:23:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:23:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1728 transitions. [2022-07-19 21:23:19,891 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7303465765004227 [2022-07-19 21:23:19,892 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1728 transitions. [2022-07-19 21:23:19,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1728 transitions. [2022-07-19 21:23:19,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:19,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1728 transitions. [2022-07-19 21:23:19,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.42857142857143) internal successors, (1728), 14 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:19,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:19,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:19,900 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 14 states and 1728 transitions. [2022-07-19 21:23:19,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 1316 flow [2022-07-19 21:23:19,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 322 transitions, 1289 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-19 21:23:19,911 INFO L242 Difference]: Finished difference. Result has 162 places, 160 transitions, 522 flow [2022-07-19 21:23:19,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-07-19 21:23:19,913 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 11 predicate places. [2022-07-19 21:23:19,913 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 522 flow [2022-07-19 21:23:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:19,914 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:19,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:19,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:23:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:23:20,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1314069844, now seen corresponding path program 2 times [2022-07-19 21:23:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125926326] [2022-07-19 21:23:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:20,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:20,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125926326] [2022-07-19 21:23:20,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125926326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:20,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:20,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:23:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961847881] [2022-07-19 21:23:20,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:23:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:23:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:23:20,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-19 21:23:20,365 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:20,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:20,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-19 21:23:20,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:23,172 INFO L129 PetriNetUnfolder]: 25967/37698 cut-off events. [2022-07-19 21:23:23,172 INFO L130 PetriNetUnfolder]: For 41843/42094 co-relation queries the response was YES. [2022-07-19 21:23:23,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103428 conditions, 37698 events. 25967/37698 cut-off events. For 41843/42094 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 245982 event pairs, 2103 based on Foata normal form. 325/30114 useless extension candidates. Maximal degree in co-relation 103415. Up to 27357 conditions per place. [2022-07-19 21:23:23,549 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 98 selfloop transitions, 19 changer transitions 1/202 dead transitions. [2022-07-19 21:23:23,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 924 flow [2022-07-19 21:23:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:23:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:23:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-19 21:23:23,553 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-19 21:23:23,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-19 21:23:23,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-19 21:23:23,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:23,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-19 21:23:23,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:23,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:23,557 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:23,557 INFO L186 Difference]: Start difference. First operand has 162 places, 160 transitions, 522 flow. Second operand 6 states and 738 transitions. [2022-07-19 21:23:23,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 924 flow [2022-07-19 21:23:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 202 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:23:23,728 INFO L242 Difference]: Finished difference. Result has 165 places, 166 transitions, 618 flow [2022-07-19 21:23:23,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=165, PETRI_TRANSITIONS=166} [2022-07-19 21:23:23,729 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 14 predicate places. [2022-07-19 21:23:23,729 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 166 transitions, 618 flow [2022-07-19 21:23:23,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:23,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:23,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:23,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:23:23,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -598835330, now seen corresponding path program 1 times [2022-07-19 21:23:23,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:23,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582443102] [2022-07-19 21:23:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:23,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:24,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582443102] [2022-07-19 21:23:24,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582443102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:24,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:24,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:23:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244838928] [2022-07-19 21:23:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:23:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:23:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:23:24,031 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-19 21:23:24,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 166 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:24,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:24,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-19 21:23:24,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:26,766 INFO L129 PetriNetUnfolder]: 25731/36409 cut-off events. [2022-07-19 21:23:26,767 INFO L130 PetriNetUnfolder]: For 60756/60880 co-relation queries the response was YES. [2022-07-19 21:23:26,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107878 conditions, 36409 events. 25731/36409 cut-off events. For 60756/60880 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 226401 event pairs, 5946 based on Foata normal form. 1/27885 useless extension candidates. Maximal degree in co-relation 107862. Up to 27357 conditions per place. [2022-07-19 21:23:27,079 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 105 selfloop transitions, 27 changer transitions 1/217 dead transitions. [2022-07-19 21:23:27,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1163 flow [2022-07-19 21:23:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:23:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:23:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 739 transitions. [2022-07-19 21:23:27,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7287968441814595 [2022-07-19 21:23:27,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 739 transitions. [2022-07-19 21:23:27,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 739 transitions. [2022-07-19 21:23:27,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:27,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 739 transitions. [2022-07-19 21:23:27,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.16666666666667) internal successors, (739), 6 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:27,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:27,087 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:27,087 INFO L186 Difference]: Start difference. First operand has 165 places, 166 transitions, 618 flow. Second operand 6 states and 739 transitions. [2022-07-19 21:23:27,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1163 flow [2022-07-19 21:23:27,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1100 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-19 21:23:27,183 INFO L242 Difference]: Finished difference. Result has 169 places, 176 transitions, 748 flow [2022-07-19 21:23:27,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=169, PETRI_TRANSITIONS=176} [2022-07-19 21:23:27,185 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 18 predicate places. [2022-07-19 21:23:27,185 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 176 transitions, 748 flow [2022-07-19 21:23:27,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:27,185 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:27,185 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:27,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:23:27,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash -468160624, now seen corresponding path program 2 times [2022-07-19 21:23:27,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:27,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464421894] [2022-07-19 21:23:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:27,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464421894] [2022-07-19 21:23:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464421894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:23:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178376229] [2022-07-19 21:23:27,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:23:27,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:23:27,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:23:27,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:23:27,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:23:27,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:23:27,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:23:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:23:27,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:23:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:27,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:23:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178376229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:23:27,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:23:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-19 21:23:27,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662548992] [2022-07-19 21:23:27,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:23:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 21:23:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 21:23:27,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:23:27,987 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-19 21:23:27,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 176 transitions, 748 flow. Second operand has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:27,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:27,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-19 21:23:27,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:35,796 INFO L129 PetriNetUnfolder]: 66286/95783 cut-off events. [2022-07-19 21:23:35,796 INFO L130 PetriNetUnfolder]: For 154992/155381 co-relation queries the response was YES. [2022-07-19 21:23:36,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284484 conditions, 95783 events. 66286/95783 cut-off events. For 154992/155381 co-relation queries the response was YES. Maximal size of possible extension queue 4456. Compared 704466 event pairs, 12111 based on Foata normal form. 2409/85526 useless extension candidates. Maximal degree in co-relation 284466. Up to 26948 conditions per place. [2022-07-19 21:23:36,859 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 289 selfloop transitions, 44 changer transitions 1/418 dead transitions. [2022-07-19 21:23:36,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 418 transitions, 2633 flow [2022-07-19 21:23:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 21:23:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-19 21:23:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2022-07-19 21:23:36,864 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7295012679628065 [2022-07-19 21:23:36,864 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2022-07-19 21:23:36,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2022-07-19 21:23:36,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:36,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2022-07-19 21:23:36,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.28571428571429) internal successors, (1726), 14 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:36,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:36,880 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:36,880 INFO L186 Difference]: Start difference. First operand has 169 places, 176 transitions, 748 flow. Second operand 14 states and 1726 transitions. [2022-07-19 21:23:36,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 418 transitions, 2633 flow [2022-07-19 21:23:37,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 418 transitions, 2606 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:23:37,991 INFO L242 Difference]: Finished difference. Result has 186 places, 190 transitions, 950 flow [2022-07-19 21:23:37,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=950, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2022-07-19 21:23:37,992 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 35 predicate places. [2022-07-19 21:23:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 950 flow [2022-07-19 21:23:37,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:37,993 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:37,993 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:38,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:23:38,208 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,SelfDestructingSolverStorable5 [2022-07-19 21:23:38,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash 601801034, now seen corresponding path program 1 times [2022-07-19 21:23:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270301501] [2022-07-19 21:23:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:38,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:38,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:38,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270301501] [2022-07-19 21:23:38,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270301501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:38,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:38,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:23:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139803156] [2022-07-19 21:23:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:23:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:23:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:23:38,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-19 21:23:38,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 950 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:38,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:38,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-19 21:23:38,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:23:46,474 INFO L129 PetriNetUnfolder]: 65079/94562 cut-off events. [2022-07-19 21:23:46,474 INFO L130 PetriNetUnfolder]: For 278930/279421 co-relation queries the response was YES. [2022-07-19 21:23:47,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325402 conditions, 94562 events. 65079/94562 cut-off events. For 278930/279421 co-relation queries the response was YES. Maximal size of possible extension queue 4654. Compared 705855 event pairs, 30842 based on Foata normal form. 246/82525 useless extension candidates. Maximal degree in co-relation 325378. Up to 76664 conditions per place. [2022-07-19 21:23:47,848 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 120 selfloop transitions, 35 changer transitions 1/240 dead transitions. [2022-07-19 21:23:47,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 240 transitions, 1592 flow [2022-07-19 21:23:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:23:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:23:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-19 21:23:47,850 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-19 21:23:47,851 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-19 21:23:47,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-19 21:23:47,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:23:47,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-19 21:23:47,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:47,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:47,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:47,854 INFO L186 Difference]: Start difference. First operand has 186 places, 190 transitions, 950 flow. Second operand 6 states and 738 transitions. [2022-07-19 21:23:47,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 240 transitions, 1592 flow [2022-07-19 21:23:48,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 240 transitions, 1543 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-19 21:23:48,677 INFO L242 Difference]: Finished difference. Result has 188 places, 200 transitions, 1146 flow [2022-07-19 21:23:48,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=188, PETRI_TRANSITIONS=200} [2022-07-19 21:23:48,678 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 37 predicate places. [2022-07-19 21:23:48,678 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 200 transitions, 1146 flow [2022-07-19 21:23:48,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:48,679 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:23:48,679 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:23:48,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:23:48,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-19 21:23:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:23:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1026495128, now seen corresponding path program 1 times [2022-07-19 21:23:48,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:23:48,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247236364] [2022-07-19 21:23:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:23:48,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:23:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:23:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:23:48,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:23:48,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247236364] [2022-07-19 21:23:48,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247236364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:23:48,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:23:48,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:23:48,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189526831] [2022-07-19 21:23:48,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:23:48,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:23:48,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:23:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:23:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:23:48,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-19 21:23:48,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 200 transitions, 1146 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:23:48,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:23:48,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-19 21:23:48,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand