./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.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 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:26:33,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:26:33,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:26:33,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:26:33,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:26:33,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:26:33,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:26:33,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:26:33,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:26:33,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:26:33,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:26:33,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:26:33,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:26:33,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:26:33,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:26:33,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:26:33,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:26:33,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:26:33,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:26:33,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:26:33,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:26:33,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:26:33,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:26:33,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:26:33,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:26:33,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:26:33,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:26:33,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:26:33,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:26:33,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:26:33,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:26:33,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:26:33,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:26:33,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:26:33,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:26:33,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:26:33,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:26:33,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:26:33,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:26:33,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:26:33,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:26:33,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:26:33,576 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:26:33,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:26:33,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:26:33,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:26:33,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:26:33,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:26:33,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:26:33,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:26:33,579 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:26:33,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:26:33,580 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:26:33,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:26:33,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:26:33,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:26:33,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:26:33,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:26:33,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:26:33,581 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:26:33,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:26:33,581 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:26:33,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:26:33,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:26:33,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:26:33,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:26:33,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:26:33,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:26:33,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:26:33,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:26:33,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:26:33,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:26:33,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:26:33,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:26:33,584 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:26:33,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:26:33,584 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:26:33,585 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:26:33,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:26:33,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:26:33,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:26:33,930 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:26:33,931 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:26:33,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-09-01 14:26:35,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:26:35,315 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:26:35,316 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-09-01 14:26:35,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5ccac94/3eed8f6640e64ee28ab89a35e6ac6b7d/FLAG10f1c9c2d [2023-09-01 14:26:35,345 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5ccac94/3eed8f6640e64ee28ab89a35e6ac6b7d [2023-09-01 14:26:35,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:26:35,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:26:35,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:26:35,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:26:35,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:26:35,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745198c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35, skipping insertion in model container [2023-09-01 14:26:35,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:26:35,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:26:35,581 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2023-09-01 14:26:35,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:26:35,604 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:26:35,637 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2023-09-01 14:26:35,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:26:35,652 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:26:35,654 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:26:35,660 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:26:35,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35 WrapperNode [2023-09-01 14:26:35,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:26:35,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:26:35,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:26:35,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:26:35,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,713 INFO L138 Inliner]: procedures = 26, calls = 73, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 274 [2023-09-01 14:26:35,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:26:35,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:26:35,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:26:35,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:26:35,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:26:35,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:26:35,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:26:35,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:26:35,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (1/1) ... [2023-09-01 14:26:35,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:26:35,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:26:35,797 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) [2023-09-01 14:26:35,810 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 [2023-09-01 14:26:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:26:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:26:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:26:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:26:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:26:35,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:26:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:26:35,836 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:26:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:26:35,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:26:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 14:26:35,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 14:26:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:26:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:26:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:26:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:26:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:26:35,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:26:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:26:35,839 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:26:35,992 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:26:36,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:26:36,399 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:26:36,501 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:26:36,501 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-09-01 14:26:36,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:26:36 BoogieIcfgContainer [2023-09-01 14:26:36,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:26:36,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:26:36,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:26:36,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:26:36,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:26:35" (1/3) ... [2023-09-01 14:26:36,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248a1c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:26:36, skipping insertion in model container [2023-09-01 14:26:36,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:26:35" (2/3) ... [2023-09-01 14:26:36,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248a1c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:26:36, skipping insertion in model container [2023-09-01 14:26:36,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:26:36" (3/3) ... [2023-09-01 14:26:36,511 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2023-09-01 14:26:36,518 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:26:36,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:26:36,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:26:36,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:26:36,609 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 14:26:36,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 227 transitions, 486 flow [2023-09-01 14:26:36,762 INFO L130 PetriNetUnfolder]: 18/223 cut-off events. [2023-09-01 14:26:36,763 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:26:36,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 223 events. 18/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 191. Up to 3 conditions per place. [2023-09-01 14:26:36,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 227 transitions, 486 flow [2023-09-01 14:26:36,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 211 transitions, 446 flow [2023-09-01 14:26:36,781 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:26:36,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 211 transitions, 446 flow [2023-09-01 14:26:36,791 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 211 transitions, 446 flow [2023-09-01 14:26:36,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 211 transitions, 446 flow [2023-09-01 14:26:36,830 INFO L130 PetriNetUnfolder]: 18/211 cut-off events. [2023-09-01 14:26:36,830 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:26:36,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 211 events. 18/211 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 126 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 191. Up to 3 conditions per place. [2023-09-01 14:26:36,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 2284 [2023-09-01 14:26:45,131 INFO L134 LiptonReduction]: Checked pairs total: 4694 [2023-09-01 14:26:45,131 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-09-01 14:26:45,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:26:45,148 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c962bad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:26:45,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 14:26:45,157 INFO L130 PetriNetUnfolder]: 5/35 cut-off events. [2023-09-01 14:26:45,158 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 14:26:45,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:45,158 INFO L208 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] [2023-09-01 14:26:45,159 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 2 more)] === [2023-09-01 14:26:45,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash -685861163, now seen corresponding path program 1 times [2023-09-01 14:26:45,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:45,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610286097] [2023-09-01 14:26:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:45,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:45,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610286097] [2023-09-01 14:26:45,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610286097] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:45,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:45,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:26:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847372503] [2023-09-01 14:26:45,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:26:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:26:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:26:45,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 438 [2023-09-01 14:26:45,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:45,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:45,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 438 [2023-09-01 14:26:45,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:46,125 INFO L130 PetriNetUnfolder]: 1835/2622 cut-off events. [2023-09-01 14:26:46,125 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2023-09-01 14:26:46,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 2622 events. 1835/2622 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11831 event pairs, 180 based on Foata normal form. 0/2183 useless extension candidates. Maximal degree in co-relation 4539. Up to 845 conditions per place. [2023-09-01 14:26:46,145 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 76 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-09-01 14:26:46,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 83 transitions, 373 flow [2023-09-01 14:26:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:26:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:26:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1063 transitions. [2023-09-01 14:26:46,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853881278538813 [2023-09-01 14:26:46,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1063 transitions. [2023-09-01 14:26:46,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1063 transitions. [2023-09-01 14:26:46,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:46,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1063 transitions. [2023-09-01 14:26:46,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.6) internal successors, (1063), 5 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,191 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 96 flow. Second operand 5 states and 1063 transitions. [2023-09-01 14:26:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 83 transitions, 373 flow [2023-09-01 14:26:46,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 340 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-09-01 14:26:46,201 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 108 flow [2023-09-01 14:26:46,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-09-01 14:26:46,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-09-01 14:26:46,212 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 108 flow [2023-09-01 14:26:46,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:46,214 INFO L208 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] [2023-09-01 14:26:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:26:46,214 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 2 more)] === [2023-09-01 14:26:46,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash 528431825, now seen corresponding path program 2 times [2023-09-01 14:26:46,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386541734] [2023-09-01 14:26:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:46,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:46,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386541734] [2023-09-01 14:26:46,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386541734] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:46,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:46,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:26:46,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035816326] [2023-09-01 14:26:46,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:46,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:26:46,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:26:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:26:46,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 438 [2023-09-01 14:26:46,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:46,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 438 [2023-09-01 14:26:46,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:46,772 INFO L130 PetriNetUnfolder]: 1949/2762 cut-off events. [2023-09-01 14:26:46,772 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-09-01 14:26:46,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6091 conditions, 2762 events. 1949/2762 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 12734 event pairs, 198 based on Foata normal form. 0/2393 useless extension candidates. Maximal degree in co-relation 3849. Up to 1095 conditions per place. [2023-09-01 14:26:46,789 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 65 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2023-09-01 14:26:46,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 346 flow [2023-09-01 14:26:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:26:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:26:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1052 transitions. [2023-09-01 14:26:46,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480365296803653 [2023-09-01 14:26:46,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1052 transitions. [2023-09-01 14:26:46,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1052 transitions. [2023-09-01 14:26:46,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:46,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1052 transitions. [2023-09-01 14:26:46,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.4) internal successors, (1052), 5 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,801 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,801 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 108 flow. Second operand 5 states and 1052 transitions. [2023-09-01 14:26:46,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 346 flow [2023-09-01 14:26:46,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:26:46,806 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 149 flow [2023-09-01 14:26:46,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-09-01 14:26:46,807 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-09-01 14:26:46,807 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 149 flow [2023-09-01 14:26:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:46,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:46,808 INFO L208 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] [2023-09-01 14:26:46,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:26:46,809 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 2 more)] === [2023-09-01 14:26:46,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1985387241, now seen corresponding path program 3 times [2023-09-01 14:26:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:46,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070772751] [2023-09-01 14:26:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:46,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070772751] [2023-09-01 14:26:47,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070772751] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:47,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:47,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:26:47,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678740439] [2023-09-01 14:26:47,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:47,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:26:47,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:26:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:26:47,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 438 [2023-09-01 14:26:47,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 149 flow. Second operand has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:47,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:47,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 438 [2023-09-01 14:26:47,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:47,948 INFO L130 PetriNetUnfolder]: 4931/6722 cut-off events. [2023-09-01 14:26:47,948 INFO L131 PetriNetUnfolder]: For 3310/3310 co-relation queries the response was YES. [2023-09-01 14:26:47,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16349 conditions, 6722 events. 4931/6722 cut-off events. For 3310/3310 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32310 event pairs, 338 based on Foata normal form. 164/6161 useless extension candidates. Maximal degree in co-relation 8964. Up to 2244 conditions per place. [2023-09-01 14:26:47,978 INFO L137 encePairwiseOnDemand]: 431/438 looper letters, 86 selfloop transitions, 7 changer transitions 21/115 dead transitions. [2023-09-01 14:26:47,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 115 transitions, 600 flow [2023-09-01 14:26:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:26:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:26:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1447 transitions. [2023-09-01 14:26:47,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4719504240052185 [2023-09-01 14:26:47,983 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1447 transitions. [2023-09-01 14:26:47,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1447 transitions. [2023-09-01 14:26:47,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:47,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1447 transitions. [2023-09-01 14:26:47,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 206.71428571428572) internal successors, (1447), 7 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:47,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:47,994 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 438.0) internal successors, (3504), 8 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:47,995 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 149 flow. Second operand 7 states and 1447 transitions. [2023-09-01 14:26:47,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 115 transitions, 600 flow [2023-09-01 14:26:48,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 115 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:26:48,005 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 156 flow [2023-09-01 14:26:48,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-09-01 14:26:48,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-09-01 14:26:48,006 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 156 flow [2023-09-01 14:26:48,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:48,007 INFO L208 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] [2023-09-01 14:26:48,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:26:48,008 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 2 more)] === [2023-09-01 14:26:48,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 529060162, now seen corresponding path program 1 times [2023-09-01 14:26:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242701904] [2023-09-01 14:26:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:48,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242701904] [2023-09-01 14:26:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242701904] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:26:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583842895] [2023-09-01 14:26:48,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:26:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:26:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:26:48,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 438 [2023-09-01 14:26:48,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:48,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 438 [2023-09-01 14:26:48,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:48,542 INFO L130 PetriNetUnfolder]: 1897/2812 cut-off events. [2023-09-01 14:26:48,543 INFO L131 PetriNetUnfolder]: For 3281/3281 co-relation queries the response was YES. [2023-09-01 14:26:48,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7253 conditions, 2812 events. 1897/2812 cut-off events. For 3281/3281 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12993 event pairs, 492 based on Foata normal form. 54/2554 useless extension candidates. Maximal degree in co-relation 2968. Up to 2139 conditions per place. [2023-09-01 14:26:48,559 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 45 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-09-01 14:26:48,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 272 flow [2023-09-01 14:26:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:26:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:26:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-09-01 14:26:48,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832572298325723 [2023-09-01 14:26:48,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-09-01 14:26:48,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-09-01 14:26:48,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:48,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-09-01 14:26:48,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,568 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 156 flow. Second operand 3 states and 635 transitions. [2023-09-01 14:26:48,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 272 flow [2023-09-01 14:26:48,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 244 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-09-01 14:26:48,573 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 130 flow [2023-09-01 14:26:48,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-09-01 14:26:48,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-09-01 14:26:48,574 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 130 flow [2023-09-01 14:26:48,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:48,575 INFO L208 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] [2023-09-01 14:26:48,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:26:48,576 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 2 more)] === [2023-09-01 14:26:48,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1604329013, now seen corresponding path program 1 times [2023-09-01 14:26:48,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:48,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239956440] [2023-09-01 14:26:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:26:48,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239956440] [2023-09-01 14:26:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239956440] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:48,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:48,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:26:48,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829759408] [2023-09-01 14:26:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:48,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:26:48,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:26:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:26:48,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 438 [2023-09-01 14:26:48,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:48,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:48,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 438 [2023-09-01 14:26:48,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:49,061 INFO L130 PetriNetUnfolder]: 2162/3195 cut-off events. [2023-09-01 14:26:49,061 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2023-09-01 14:26:49,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 3195 events. 2162/3195 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15056 event pairs, 1534 based on Foata normal form. 44/2841 useless extension candidates. Maximal degree in co-relation 3779. Up to 2560 conditions per place. [2023-09-01 14:26:49,080 INFO L137 encePairwiseOnDemand]: 434/438 looper letters, 34 selfloop transitions, 2 changer transitions 17/58 dead transitions. [2023-09-01 14:26:49,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 281 flow [2023-09-01 14:26:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:26:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:26:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 820 transitions. [2023-09-01 14:26:49,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680365296803653 [2023-09-01 14:26:49,083 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 820 transitions. [2023-09-01 14:26:49,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 820 transitions. [2023-09-01 14:26:49,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:49,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 820 transitions. [2023-09-01 14:26:49,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,089 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,089 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 130 flow. Second operand 4 states and 820 transitions. [2023-09-01 14:26:49,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 281 flow [2023-09-01 14:26:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:26:49,094 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 142 flow [2023-09-01 14:26:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-09-01 14:26:49,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-09-01 14:26:49,095 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 142 flow [2023-09-01 14:26:49,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:49,096 INFO L208 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] [2023-09-01 14:26:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:26:49,096 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 2 more)] === [2023-09-01 14:26:49,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash 716362356, now seen corresponding path program 1 times [2023-09-01 14:26:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:49,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807248565] [2023-09-01 14:26:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:49,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:26:49,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807248565] [2023-09-01 14:26:49,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807248565] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:49,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:49,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:26:49,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090609805] [2023-09-01 14:26:49,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:49,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:26:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:26:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:26:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 438 [2023-09-01 14:26:49,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:49,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 438 [2023-09-01 14:26:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:49,586 INFO L130 PetriNetUnfolder]: 1464/2239 cut-off events. [2023-09-01 14:26:49,587 INFO L131 PetriNetUnfolder]: For 1464/1464 co-relation queries the response was YES. [2023-09-01 14:26:49,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5761 conditions, 2239 events. 1464/2239 cut-off events. For 1464/1464 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9852 event pairs, 683 based on Foata normal form. 34/2073 useless extension candidates. Maximal degree in co-relation 5738. Up to 1902 conditions per place. [2023-09-01 14:26:49,602 INFO L137 encePairwiseOnDemand]: 435/438 looper letters, 45 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-09-01 14:26:49,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 278 flow [2023-09-01 14:26:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:26:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:26:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-09-01 14:26:49,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4885844748858447 [2023-09-01 14:26:49,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-09-01 14:26:49,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-09-01 14:26:49,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:49,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-09-01 14:26:49,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,609 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 142 flow. Second operand 3 states and 642 transitions. [2023-09-01 14:26:49,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 278 flow [2023-09-01 14:26:49,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 272 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:26:49,613 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 148 flow [2023-09-01 14:26:49,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2023-09-01 14:26:49,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-09-01 14:26:49,614 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 148 flow [2023-09-01 14:26:49,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:49,615 INFO L208 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] [2023-09-01 14:26:49,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:26:49,615 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 2 more)] === [2023-09-01 14:26:49,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2092257775, now seen corresponding path program 1 times [2023-09-01 14:26:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:49,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632872938] [2023-09-01 14:26:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:49,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:26:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632872938] [2023-09-01 14:26:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632872938] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:26:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:26:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:26:49,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289468822] [2023-09-01 14:26:49,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:26:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:26:49,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:26:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:26:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:26:49,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 438 [2023-09-01 14:26:49,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:49,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:26:49,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 438 [2023-09-01 14:26:49,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:26:50,102 INFO L130 PetriNetUnfolder]: 1572/2450 cut-off events. [2023-09-01 14:26:50,102 INFO L131 PetriNetUnfolder]: For 1768/1768 co-relation queries the response was YES. [2023-09-01 14:26:50,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 2450 events. 1572/2450 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10885 event pairs, 1205 based on Foata normal form. 22/2270 useless extension candidates. Maximal degree in co-relation 6152. Up to 2077 conditions per place. [2023-09-01 14:26:50,116 INFO L137 encePairwiseOnDemand]: 433/438 looper letters, 36 selfloop transitions, 2 changer transitions 18/61 dead transitions. [2023-09-01 14:26:50,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 313 flow [2023-09-01 14:26:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:26:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:26:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2023-09-01 14:26:50,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625570776255708 [2023-09-01 14:26:50,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2023-09-01 14:26:50,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2023-09-01 14:26:50,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:26:50,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2023-09-01 14:26:50,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:50,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:50,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 438.0) internal successors, (2628), 6 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:50,127 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 148 flow. Second operand 5 states and 1013 transitions. [2023-09-01 14:26:50,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 313 flow [2023-09-01 14:26:50,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:26:50,133 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 162 flow [2023-09-01 14:26:50,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-09-01 14:26:50,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2023-09-01 14:26:50,134 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 162 flow [2023-09-01 14:26:50,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:26:50,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:26:50,135 INFO L208 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] [2023-09-01 14:26:50,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:26:50,135 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 2 more)] === [2023-09-01 14:26:50,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:26:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash -645640744, now seen corresponding path program 1 times [2023-09-01 14:26:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:26:50,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795766414] [2023-09-01 14:26:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:26:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:26:52,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:26:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795766414] [2023-09-01 14:26:52,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795766414] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:26:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185302799] [2023-09-01 14:26:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:26:52,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:26:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:26:52,065 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) [2023-09-01 14:26:52,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:26:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:26:52,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 55 conjunts are in the unsatisfiable core [2023-09-01 14:26:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:26:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:26:52,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:26:53,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:26:53,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:26:53,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:26:53,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-09-01 14:26:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:26:53,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:26:54,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:26:54,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1987 treesize of output 1799 [2023-09-01 14:26:54,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:26:54,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 350 [2023-09-01 14:26:54,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:26:54,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 303 [2023-09-01 14:27:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:27:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185302799] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:27:11,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:27:11,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2023-09-01 14:27:11,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741709131] [2023-09-01 14:27:11,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:27:11,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-09-01 14:27:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:27:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-09-01 14:27:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1881, Unknown=5, NotChecked=0, Total=2070 [2023-09-01 14:27:13,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 438 [2023-09-01 14:27:13,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 162 flow. Second operand has 46 states, 46 states have (on average 118.0) internal successors, (5428), 46 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:27:13,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:27:13,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 438 [2023-09-01 14:27:13,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:27:40,820 WARN L222 SmtUtils]: Spent 14.45s on a formula simplification. DAG size of input: 117 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:27:54,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:28:02,688 WARN L222 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:28:19,248 WARN L222 SmtUtils]: Spent 11.13s on a formula simplification. DAG size of input: 115 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:28:25,884 WARN L222 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 106 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:28:39,202 WARN L222 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 104 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:28:52,683 WARN L222 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 82 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:29:08,153 WARN L222 SmtUtils]: Spent 15.09s on a formula simplification. DAG size of input: 119 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:29:19,035 WARN L222 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 108 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:29:39,835 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 97 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:29:47,560 WARN L222 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 110 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:29:55,240 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 66 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:30:09,212 WARN L222 SmtUtils]: Spent 12.04s on a formula simplification. DAG size of input: 117 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:30:20,740 WARN L222 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 106 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:30:27,672 WARN L222 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 99 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:30:42,878 WARN L222 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 108 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:30:58,163 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:31:13,095 WARN L222 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:31:27,773 WARN L222 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 101 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:31:32,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:31:48,376 WARN L222 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:32:05,909 INFO L130 PetriNetUnfolder]: 27198/38792 cut-off events. [2023-09-01 14:32:05,909 INFO L131 PetriNetUnfolder]: For 29793/29793 co-relation queries the response was YES. [2023-09-01 14:32:06,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108408 conditions, 38792 events. 27198/38792 cut-off events. For 29793/29793 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 234685 event pairs, 538 based on Foata normal form. 759/37054 useless extension candidates. Maximal degree in co-relation 108385. Up to 6300 conditions per place. [2023-09-01 14:32:06,161 INFO L137 encePairwiseOnDemand]: 411/438 looper letters, 1701 selfloop transitions, 945 changer transitions 311/2957 dead transitions. [2023-09-01 14:32:06,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 2957 transitions, 15286 flow [2023-09-01 14:32:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2023-09-01 14:32:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2023-09-01 14:32:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 37352 transitions. [2023-09-01 14:32:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871331273157757 [2023-09-01 14:32:06,331 INFO L72 ComplementDD]: Start complementDD. Operand 297 states and 37352 transitions. [2023-09-01 14:32:06,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 297 states and 37352 transitions. [2023-09-01 14:32:06,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:32:06,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 297 states and 37352 transitions. [2023-09-01 14:32:06,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 298 states, 297 states have (on average 125.76430976430976) internal successors, (37352), 297 states have internal predecessors, (37352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:06,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 298 states, 298 states have (on average 438.0) internal successors, (130524), 298 states have internal predecessors, (130524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:06,617 INFO L81 ComplementDD]: Finished complementDD. Result has 298 states, 298 states have (on average 438.0) internal successors, (130524), 298 states have internal predecessors, (130524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:06,617 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 162 flow. Second operand 297 states and 37352 transitions. [2023-09-01 14:32:06,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 2957 transitions, 15286 flow [2023-09-01 14:32:06,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 2957 transitions, 15266 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 14:32:06,706 INFO L231 Difference]: Finished difference. Result has 440 places, 1207 transitions, 7550 flow [2023-09-01 14:32:06,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=297, PETRI_FLOW=7550, PETRI_PLACES=440, PETRI_TRANSITIONS=1207} [2023-09-01 14:32:06,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2023-09-01 14:32:06,709 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1207 transitions, 7550 flow [2023-09-01 14:32:06,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 118.0) internal successors, (5428), 46 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:32:06,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:32:06,712 INFO L208 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] [2023-09-01 14:32:06,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:32:06,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:06,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-09-01 14:32:06,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:32:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1127794134, now seen corresponding path program 2 times [2023-09-01 14:32:06,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:32:06,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523930194] [2023-09-01 14:32:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:32:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:32:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:32:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:32:09,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:32:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523930194] [2023-09-01 14:32:09,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523930194] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:32:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157098754] [2023-09-01 14:32:09,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:32:09,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:32:09,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:32:09,005 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) [2023-09-01 14:32:09,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:32:09,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:32:09,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:32:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 14:32:09,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:32:09,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:32:09,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:32:10,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:32:10,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:32:10,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:32:10,683 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-09-01 14:32:10,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 36 [2023-09-01 14:32:10,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-09-01 14:32:10,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-09-01 14:32:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:32:10,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:32:11,144 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_358 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_358) c_~queue2~0.base) (+ c_~queue2~0.offset (* c_~front2~0 4))) c_~d2~0) (+ (* c_~W~0 2) 1))) is different from false [2023-09-01 14:32:12,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:12,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-09-01 14:32:12,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:12,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2229 treesize of output 2177 [2023-09-01 14:32:12,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:12,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2085 treesize of output 1733 [2023-09-01 14:32:12,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:12,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1653 treesize of output 1517 [2023-09-01 14:32:12,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:32:12,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1298 treesize of output 1270 [2023-09-01 14:32:12,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 230 [2023-09-01 14:39:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:39:44,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157098754] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:39:44,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:39:44,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 49 [2023-09-01 14:39:44,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467151500] [2023-09-01 14:39:44,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:39:44,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-09-01 14:39:44,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:39:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-09-01 14:39:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2136, Unknown=12, NotChecked=94, Total=2450 [2023-09-01 14:39:45,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 438 [2023-09-01 14:39:45,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1207 transitions, 7550 flow. Second operand has 50 states, 50 states have (on average 110.84) internal successors, (5542), 50 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:39:45,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:39:45,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 438 [2023-09-01 14:39:45,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:40:00,448 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_358 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_358) c_~queue2~0.base) (+ c_~queue2~0.offset (* c_~front2~0 4))) c_~d2~0) (+ (* c_~W~0 2) 1)))) (.cse4 (+ c_~queue1~0.offset (* c_~front1~0 4))) (.cse5 (select (select |c_#memory_int| c_~queue2~0.base) (+ c_~queue2~0.offset (* c_~back2~0 4)))) (.cse2 (<= c_~n2~0 c_~back2~0)) (.cse1 (< c_~back2~0 0)) (.cse6 (<= c_~n1~0 c_~back1~0)) (.cse7 (< c_~back1~0 0))) (and (or .cse0 .cse1 .cse2 (forall ((~queue1~0.base Int)) (let ((.cse3 (select |c_#memory_int| ~queue1~0.base))) (or (< (+ (select .cse3 .cse4) 1) .cse5) (not (= (select .cse3 (+ c_~queue1~0.offset (* 4 c_~back1~0))) 1))))) .cse6 .cse7) .cse0 (<= c_~v_assert~0 1) (or .cse0 (not (= .cse5 (+ 1 |c_thread2Thread1of1ForFork3_~temp~0#1|))) .cse1 .cse2) (or .cse0 (< (+ (select (select |c_#memory_int| c_~queue1~0.base) .cse4) 1) .cse5) .cse1 .cse2) (<= 1 c_~v_assert~0) (<= |c_thread2Thread1of1ForFork3_~cond~1#1| 1) (or (< 0 c_~back2~0) .cse1 (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (= c_~back2~0 c_~front2~0) (< c_~d2~0 1) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t4~0#1.base|) (= c_~front1~0 c_~back1~0)) .cse6 .cse7) (<= 1 |c_thread2Thread1of1ForFork3_~cond~1#1|))) is different from false Killed by 15