./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 791161d1 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-?-791161d [2022-07-22 21:37:38,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:37:38,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:37:38,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:37:38,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:37:38,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:37:38,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:37:38,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:37:38,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:37:38,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:37:38,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:37:38,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:37:38,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:37:38,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:37:38,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:37:38,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:37:38,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:37:38,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:37:38,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:37:38,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:37:38,465 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:37:38,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:37:38,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:37:38,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:37:38,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:37:38,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:37:38,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:37:38,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:37:38,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:37:38,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:37:38,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:37:38,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:37:38,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:37:38,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:37:38,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:37:38,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:37:38,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:37:38,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:37:38,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:37:38,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:37:38,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:37:38,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:37:38,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:37:38,530 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:37:38,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:37:38,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:37:38,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:37:38,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:37:38,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:37:38,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:37:38,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:37:38,537 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:37:38,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:37:38,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:37:38,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:37:38,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:37:38,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:37:38,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:37:38,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:37:38,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:37:38,539 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:37:38,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:37:38,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:37:38,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:37:38,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:37:38,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:37:38,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:37:38,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:37:38,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:37:38,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:37:38,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:37:38,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:37:38,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:37:38,543 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:37:38,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:37:38,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:37:38,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2022-07-22 21:37:38,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:37:38,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:37:38,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:37:38,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:37:38,805 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:37:38,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-22 21:37:38,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc2f0e7a/3828c64f7d73435f9a40fa12f4c61ac6/FLAG1b15d2f5d [2022-07-22 21:37:39,253 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:37:39,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-22 21:37:39,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc2f0e7a/3828c64f7d73435f9a40fa12f4c61ac6/FLAG1b15d2f5d [2022-07-22 21:37:39,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cc2f0e7a/3828c64f7d73435f9a40fa12f4c61ac6 [2022-07-22 21:37:39,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:37:39,272 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:37:39,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:37:39,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:37:39,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:37:39,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9b7dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39, skipping insertion in model container [2022-07-22 21:37:39,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:37:39,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:37:39,458 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] [2022-07-22 21:37:39,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:37:39,467 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:37:39,487 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] [2022-07-22 21:37:39,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:37:39,499 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:37:39,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39 WrapperNode [2022-07-22 21:37:39,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:37:39,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:37:39,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:37:39,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:37:39,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,530 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-07-22 21:37:39,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:37:39,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:37:39,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:37:39,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:37:39,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:37:39,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:37:39,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:37:39,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:37:39,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (1/1) ... [2022-07-22 21:37:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:37:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:37:39,595 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) [2022-07-22 21:37:39,611 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 [2022-07-22 21:37:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:37:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:37:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:37:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:37:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:37:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:37:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:37:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-22 21:37:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-22 21:37:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-07-22 21:37:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:37:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:37:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:37:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:37:39,647 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:37:39,752 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:37:39,753 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:37:40,014 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:37:40,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:37:40,023 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:37:40,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:37:40 BoogieIcfgContainer [2022-07-22 21:37:40,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:37:40,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:37:40,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:37:40,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:37:40,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:37:39" (1/3) ... [2022-07-22 21:37:40,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a2bb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:37:40, skipping insertion in model container [2022-07-22 21:37:40,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:37:39" (2/3) ... [2022-07-22 21:37:40,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a2bb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:37:40, skipping insertion in model container [2022-07-22 21:37:40,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:37:40" (3/3) ... [2022-07-22 21:37:40,032 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2022-07-22 21:37:40,037 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:37:40,051 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:37:40,051 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:37:40,052 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:37:40,120 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-22 21:37:40,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-07-22 21:37:40,217 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-22 21:37:40,217 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:37:40,222 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. [2022-07-22 21:37:40,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2022-07-22 21:37:40,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2022-07-22 21:37:40,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:37:40,241 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@511f2d00, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3295615b [2022-07-22 21:37:40,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:37:40,274 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2022-07-22 21:37:40,274 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-22 21:37:40,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:40,275 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] [2022-07-22 21:37:40,276 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)] === [2022-07-22 21:37:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1805930400, now seen corresponding path program 1 times [2022-07-22 21:37:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535860330] [2022-07-22 21:37:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:40,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:40,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:40,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535860330] [2022-07-22 21:37:40,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535860330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:40,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:40,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:37:40,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030490533] [2022-07-22 21:37:40,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:40,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:37:40,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:37:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:37:40,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2022-07-22 21:37:40,674 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) [2022-07-22 21:37:40,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:40,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2022-07-22 21:37:40,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:40,740 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2022-07-22 21:37:40,740 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-22 21:37:40,747 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. [2022-07-22 21:37:40,750 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2022-07-22 21:37:40,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2022-07-22 21:37:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:37:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:37:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2022-07-22 21:37:40,766 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2022-07-22 21:37:40,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2022-07-22 21:37:40,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2022-07-22 21:37:40,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:40,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2022-07-22 21:37:40,779 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) [2022-07-22 21:37:40,785 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) [2022-07-22 21:37:40,785 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) [2022-07-22 21:37:40,787 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2022-07-22 21:37:40,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2022-07-22 21:37:40,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-07-22 21:37:40,797 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2022-07-22 21:37:40,799 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} [2022-07-22 21:37:40,803 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2022-07-22 21:37:40,803 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2022-07-22 21:37:40,804 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) [2022-07-22 21:37:40,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:40,804 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] [2022-07-22 21:37:40,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:37:40,805 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)] === [2022-07-22 21:37:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1921476920, now seen corresponding path program 1 times [2022-07-22 21:37:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:40,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449831742] [2022-07-22 21:37:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:40,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:41,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449831742] [2022-07-22 21:37:41,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449831742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:41,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:41,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:37:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413091312] [2022-07-22 21:37:41,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:37:41,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:37:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:37:41,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2022-07-22 21:37:41,405 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) [2022-07-22 21:37:41,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:41,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2022-07-22 21:37:41,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:43,745 INFO L129 PetriNetUnfolder]: 13855/19787 cut-off events. [2022-07-22 21:37:43,745 INFO L130 PetriNetUnfolder]: For 728/1092 co-relation queries the response was YES. [2022-07-22 21:37:43,790 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. [2022-07-22 21:37:43,899 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2022-07-22 21:37:43,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2022-07-22 21:37:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:37:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:37:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2022-07-22 21:37:43,903 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2022-07-22 21:37:43,903 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2022-07-22 21:37:43,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2022-07-22 21:37:43,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:43,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2022-07-22 21:37:43,945 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) [2022-07-22 21:37:43,948 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) [2022-07-22 21:37:43,949 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) [2022-07-22 21:37:43,949 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2022-07-22 21:37:43,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2022-07-22 21:37:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:37:43,956 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2022-07-22 21:37:43,957 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} [2022-07-22 21:37:43,958 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2022-07-22 21:37:43,958 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2022-07-22 21:37:43,959 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) [2022-07-22 21:37:43,959 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:43,959 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] [2022-07-22 21:37:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:37:43,960 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)] === [2022-07-22 21:37:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 856396636, now seen corresponding path program 1 times [2022-07-22 21:37:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:43,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912628206] [2022-07-22 21:37:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912628206] [2022-07-22 21:37:44,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912628206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:37:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857026424] [2022-07-22 21:37:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:37:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:37:44,350 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) [2022-07-22 21:37:44,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:37:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:44,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:37:44,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:37:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:44,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:37:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857026424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:37:45,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:37:45,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-22 21:37:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486912468] [2022-07-22 21:37:45,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:37:45,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:37:45,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:45,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:37:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:37:45,149 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-22 21:37:45,151 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) [2022-07-22 21:37:45,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:45,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-22 21:37:45,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:49,303 INFO L129 PetriNetUnfolder]: 27630/39510 cut-off events. [2022-07-22 21:37:49,303 INFO L130 PetriNetUnfolder]: For 8413/8511 co-relation queries the response was YES. [2022-07-22 21:37:49,426 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. [2022-07-22 21:37:49,662 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 207 selfloop transitions, 30 changer transitions 1/322 dead transitions. [2022-07-22 21:37:49,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 1316 flow [2022-07-22 21:37:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:37:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:37:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1728 transitions. [2022-07-22 21:37:49,667 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7303465765004227 [2022-07-22 21:37:49,667 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1728 transitions. [2022-07-22 21:37:49,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1728 transitions. [2022-07-22 21:37:49,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:49,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1728 transitions. [2022-07-22 21:37:49,672 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) [2022-07-22 21:37:49,677 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) [2022-07-22 21:37:49,679 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) [2022-07-22 21:37:49,679 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 14 states and 1728 transitions. [2022-07-22 21:37:49,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 1316 flow [2022-07-22 21:37:49,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 322 transitions, 1289 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-22 21:37:49,694 INFO L242 Difference]: Finished difference. Result has 162 places, 160 transitions, 522 flow [2022-07-22 21:37:49,695 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} [2022-07-22 21:37:49,696 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 11 predicate places. [2022-07-22 21:37:49,697 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 522 flow [2022-07-22 21:37:49,697 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) [2022-07-22 21:37:49,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:49,698 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] [2022-07-22 21:37:49,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:37:49,922 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 [2022-07-22 21:37:49,923 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)] === [2022-07-22 21:37:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1314069844, now seen corresponding path program 2 times [2022-07-22 21:37:49,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:49,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722490460] [2022-07-22 21:37:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:50,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722490460] [2022-07-22 21:37:50,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722490460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:50,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:50,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:37:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664821402] [2022-07-22 21:37:50,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:50,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:37:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:37:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:37:50,223 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-22 21:37:50,223 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) [2022-07-22 21:37:50,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:50,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-22 21:37:50,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:53,326 INFO L129 PetriNetUnfolder]: 25967/37698 cut-off events. [2022-07-22 21:37:53,327 INFO L130 PetriNetUnfolder]: For 41843/42094 co-relation queries the response was YES. [2022-07-22 21:37:53,466 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. [2022-07-22 21:37:53,727 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 98 selfloop transitions, 19 changer transitions 1/202 dead transitions. [2022-07-22 21:37:53,727 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 924 flow [2022-07-22 21:37:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:37:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:37:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-22 21:37:53,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-22 21:37:53,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-22 21:37:53,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-22 21:37:53,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:53,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-22 21:37:53,732 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) [2022-07-22 21:37:53,734 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) [2022-07-22 21:37:53,735 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) [2022-07-22 21:37:53,735 INFO L186 Difference]: Start difference. First operand has 162 places, 160 transitions, 522 flow. Second operand 6 states and 738 transitions. [2022-07-22 21:37:53,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 924 flow [2022-07-22 21:37:53,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 202 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:37:53,940 INFO L242 Difference]: Finished difference. Result has 165 places, 166 transitions, 618 flow [2022-07-22 21:37:53,941 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} [2022-07-22 21:37:53,942 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 14 predicate places. [2022-07-22 21:37:53,942 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 166 transitions, 618 flow [2022-07-22 21:37:53,942 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) [2022-07-22 21:37:53,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:53,943 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] [2022-07-22 21:37:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:37:53,943 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)] === [2022-07-22 21:37:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -598835330, now seen corresponding path program 1 times [2022-07-22 21:37:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:53,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517638090] [2022-07-22 21:37:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517638090] [2022-07-22 21:37:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517638090] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:54,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:37:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253174071] [2022-07-22 21:37:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:37:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:37:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:37:54,218 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-22 21:37:54,219 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) [2022-07-22 21:37:54,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:54,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-22 21:37:54,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:57,258 INFO L129 PetriNetUnfolder]: 25731/36409 cut-off events. [2022-07-22 21:37:57,258 INFO L130 PetriNetUnfolder]: For 60756/60880 co-relation queries the response was YES. [2022-07-22 21:37:57,397 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. [2022-07-22 21:37:57,574 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 105 selfloop transitions, 27 changer transitions 1/217 dead transitions. [2022-07-22 21:37:57,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1163 flow [2022-07-22 21:37:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:37:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:37:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 739 transitions. [2022-07-22 21:37:57,576 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7287968441814595 [2022-07-22 21:37:57,577 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 739 transitions. [2022-07-22 21:37:57,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 739 transitions. [2022-07-22 21:37:57,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:57,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 739 transitions. [2022-07-22 21:37:57,579 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) [2022-07-22 21:37:57,581 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) [2022-07-22 21:37:57,581 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) [2022-07-22 21:37:57,581 INFO L186 Difference]: Start difference. First operand has 165 places, 166 transitions, 618 flow. Second operand 6 states and 739 transitions. [2022-07-22 21:37:57,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1163 flow [2022-07-22 21:37:57,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1100 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-22 21:37:57,685 INFO L242 Difference]: Finished difference. Result has 169 places, 176 transitions, 748 flow [2022-07-22 21:37:57,685 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} [2022-07-22 21:37:57,686 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 18 predicate places. [2022-07-22 21:37:57,686 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 176 transitions, 748 flow [2022-07-22 21:37:57,687 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) [2022-07-22 21:37:57,687 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:57,687 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] [2022-07-22 21:37:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:37:57,688 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)] === [2022-07-22 21:37:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash -468160624, now seen corresponding path program 2 times [2022-07-22 21:37:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:57,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882429414] [2022-07-22 21:37:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:57,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882429414] [2022-07-22 21:37:57,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882429414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:37:57,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605360162] [2022-07-22 21:37:57,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:37:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:37:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:37:57,944 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) [2022-07-22 21:37:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:37:58,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:37:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:37:58,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 21:37:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:37:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:58,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:37:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605360162] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:37:58,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:37:58,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-22 21:37:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602806709] [2022-07-22 21:37:58,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:37:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 21:37:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 21:37:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:37:58,663 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-22 21:37:58,664 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) [2022-07-22 21:37:58,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:58,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-22 21:37:58,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:07,003 INFO L129 PetriNetUnfolder]: 66286/95783 cut-off events. [2022-07-22 21:38:07,003 INFO L130 PetriNetUnfolder]: For 154992/155381 co-relation queries the response was YES. [2022-07-22 21:38:07,426 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. [2022-07-22 21:38:07,900 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 289 selfloop transitions, 44 changer transitions 1/418 dead transitions. [2022-07-22 21:38:07,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 418 transitions, 2633 flow [2022-07-22 21:38:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:38:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:38:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2022-07-22 21:38:07,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7295012679628065 [2022-07-22 21:38:07,906 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2022-07-22 21:38:07,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2022-07-22 21:38:07,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:07,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2022-07-22 21:38:07,910 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) [2022-07-22 21:38:07,914 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) [2022-07-22 21:38:07,915 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) [2022-07-22 21:38:07,915 INFO L186 Difference]: Start difference. First operand has 169 places, 176 transitions, 748 flow. Second operand 14 states and 1726 transitions. [2022-07-22 21:38:07,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 418 transitions, 2633 flow [2022-07-22 21:38:08,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 418 transitions, 2606 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:38:08,914 INFO L242 Difference]: Finished difference. Result has 186 places, 190 transitions, 950 flow [2022-07-22 21:38:08,915 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} [2022-07-22 21:38:08,915 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 35 predicate places. [2022-07-22 21:38:08,916 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 950 flow [2022-07-22 21:38:08,916 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) [2022-07-22 21:38:08,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:08,917 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] [2022-07-22 21:38:08,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:38:09,120 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 [2022-07-22 21:38:09,121 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)] === [2022-07-22 21:38:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash 601801034, now seen corresponding path program 1 times [2022-07-22 21:38:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:09,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817958079] [2022-07-22 21:38:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:09,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817958079] [2022-07-22 21:38:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817958079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:09,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:09,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:38:09,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877977750] [2022-07-22 21:38:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:38:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:38:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:38:09,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-22 21:38:09,393 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) [2022-07-22 21:38:09,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:09,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-22 21:38:09,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:17,944 INFO L129 PetriNetUnfolder]: 65079/94562 cut-off events. [2022-07-22 21:38:17,945 INFO L130 PetriNetUnfolder]: For 278930/279421 co-relation queries the response was YES. [2022-07-22 21:38:18,476 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. [2022-07-22 21:38:19,006 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 120 selfloop transitions, 35 changer transitions 1/240 dead transitions. [2022-07-22 21:38:19,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 240 transitions, 1592 flow [2022-07-22 21:38:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:38:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:38:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-22 21:38:19,009 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-22 21:38:19,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-22 21:38:19,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-22 21:38:19,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:19,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-22 21:38:19,012 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) [2022-07-22 21:38:19,013 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) [2022-07-22 21:38:19,014 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) [2022-07-22 21:38:19,014 INFO L186 Difference]: Start difference. First operand has 186 places, 190 transitions, 950 flow. Second operand 6 states and 738 transitions. [2022-07-22 21:38:19,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 240 transitions, 1592 flow [2022-07-22 21:38:20,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 240 transitions, 1543 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-22 21:38:20,069 INFO L242 Difference]: Finished difference. Result has 188 places, 200 transitions, 1146 flow [2022-07-22 21:38:20,069 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} [2022-07-22 21:38:20,069 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 37 predicate places. [2022-07-22 21:38:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 200 transitions, 1146 flow [2022-07-22 21:38:20,070 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) [2022-07-22 21:38:20,070 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:20,070 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] [2022-07-22 21:38:20,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:38:20,071 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)] === [2022-07-22 21:38:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1026495128, now seen corresponding path program 1 times [2022-07-22 21:38:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349246014] [2022-07-22 21:38:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:38:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349246014] [2022-07-22 21:38:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349246014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:20,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:38:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382071400] [2022-07-22 21:38:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:38:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:38:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:38:20,308 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-22 21:38:20,309 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) [2022-07-22 21:38:20,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:20,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-22 21:38:20,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand