./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:31:39,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:31:39,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:31:39,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:31:39,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:31:39,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:31:39,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:31:39,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:31:39,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:31:39,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:31:39,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:31:39,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:31:39,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:31:39,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:31:39,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:31:39,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:31:39,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:31:39,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:31:39,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:31:39,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:31:39,535 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:31:39,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:31:39,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:31:39,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:31:39,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:31:39,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:31:39,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:31:39,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:31:39,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:31:39,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:31:39,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:31:39,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:31:39,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:31:39,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:31:39,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:31:39,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:31:39,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:31:39,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:31:39,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:31:39,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:31:39,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:31:39,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:31:39,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:31:39,574 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:31:39,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:31:39,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:31:39,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:31:39,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:31:39,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:31:39,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:31:39,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:31:39,580 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:31:39,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:31:39,580 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:31:39,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:31:39,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:31:39,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:31:39,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:31:39,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:31:39,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:31:39,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:31:39,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:39,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:31:39,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:31:39,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:31:39,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:31:39,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:31:39,584 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:31:39,584 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:31:39,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:31:39,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2022-07-12 10:31:39,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:31:39,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:31:39,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:31:39,802 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:31:39,802 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:31:39,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-07-12 10:31:39,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defd18285/d02093d48505488982e8b1a04476760c/FLAG2a0353a2c [2022-07-12 10:31:40,228 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:31:40,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2022-07-12 10:31:40,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defd18285/d02093d48505488982e8b1a04476760c/FLAG2a0353a2c [2022-07-12 10:31:40,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/defd18285/d02093d48505488982e8b1a04476760c [2022-07-12 10:31:40,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:31:40,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:31:40,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:40,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:31:40,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:31:40,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ebe706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40, skipping insertion in model container [2022-07-12 10:31:40,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:31:40,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:31:40,413 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-07-12 10:31:40,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:40,424 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:31:40,439 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c[3424,3437] [2022-07-12 10:31:40,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:40,450 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:31:40,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40 WrapperNode [2022-07-12 10:31:40,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:40,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:40,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:31:40,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:31:40,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,491 INFO L137 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2022-07-12 10:31:40,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:40,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:31:40,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:31:40,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:31:40,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:31:40,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:31:40,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:31:40,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:31:40,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (1/1) ... [2022-07-12 10:31:40,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:40,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:40,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:31:40,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:31:40,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:31:40,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:31:40,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:31:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:31:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:31:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:31:40,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:31:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:31:40,570 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:31:40,690 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:31:40,691 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:31:40,972 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:31:41,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:31:41,056 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-12 10:31:41,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:41 BoogieIcfgContainer [2022-07-12 10:31:41,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:31:41,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:31:41,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:31:41,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:31:41,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:31:40" (1/3) ... [2022-07-12 10:31:41,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796242fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:41, skipping insertion in model container [2022-07-12 10:31:41,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:40" (2/3) ... [2022-07-12 10:31:41,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796242fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:41, skipping insertion in model container [2022-07-12 10:31:41,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:41" (3/3) ... [2022-07-12 10:31:41,066 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2022-07-12 10:31:41,071 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:31:41,079 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:31:41,079 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:31:41,079 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:31:41,161 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:31:41,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2022-07-12 10:31:41,269 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2022-07-12 10:31:41,270 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:31:41,273 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 113 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2022-07-12 10:31:41,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2022-07-12 10:31:41,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2022-07-12 10:31:41,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:31:41,292 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@cf0ca2e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f4e86d9 [2022-07-12 10:31:41,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:31:41,323 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2022-07-12 10:31:41,323 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:31:41,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:41,324 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:41,324 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 1 more)] === [2022-07-12 10:31:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1794950426, now seen corresponding path program 1 times [2022-07-12 10:31:41,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:41,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757560558] [2022-07-12 10:31:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:41,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:41,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757560558] [2022-07-12 10:31:41,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757560558] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:41,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:41,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:31:41,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224122437] [2022-07-12 10:31:41,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:41,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:31:41,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:31:41,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:31:41,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2022-07-12 10:31:41,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:41,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:41,589 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2022-07-12 10:31:41,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:41,674 INFO L129 PetriNetUnfolder]: 71/370 cut-off events. [2022-07-12 10:31:41,674 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-07-12 10:31:41,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1047 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2022-07-12 10:31:41,680 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2022-07-12 10:31:41,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2022-07-12 10:31:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:31:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:31:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2022-07-12 10:31:41,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2022-07-12 10:31:41,696 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2022-07-12 10:31:41,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2022-07-12 10:31:41,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:41,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2022-07-12 10:31:41,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:41,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:41,716 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:41,717 INFO L186 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2022-07-12 10:31:41,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2022-07-12 10:31:41,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:31:41,724 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2022-07-12 10:31:41,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2022-07-12 10:31:41,731 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2022-07-12 10:31:41,731 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2022-07-12 10:31:41,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 191.0) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:41,731 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:41,732 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:41,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:31:41,732 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 1 more)] === [2022-07-12 10:31:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1192514382, now seen corresponding path program 1 times [2022-07-12 10:31:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:41,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368008553] [2022-07-12 10:31:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:41,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368008553] [2022-07-12 10:31:41,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368008553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:41,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:41,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:31:41,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484822246] [2022-07-12 10:31:41,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:41,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:31:41,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:31:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:31:41,986 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-12 10:31:41,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:41,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:41,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-12 10:31:41,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:42,173 INFO L129 PetriNetUnfolder]: 73/454 cut-off events. [2022-07-12 10:31:42,173 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-12 10:31:42,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 454 events. 73/454 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1293 event pairs, 38 based on Foata normal form. 11/430 useless extension candidates. Maximal degree in co-relation 622. Up to 118 conditions per place. [2022-07-12 10:31:42,176 INFO L132 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2022-07-12 10:31:42,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2022-07-12 10:31:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:31:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:31:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2022-07-12 10:31:42,180 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2022-07-12 10:31:42,180 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2022-07-12 10:31:42,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2022-07-12 10:31:42,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:42,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2022-07-12 10:31:42,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,188 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,189 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2022-07-12 10:31:42,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2022-07-12 10:31:42,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:31:42,195 INFO L242 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2022-07-12 10:31:42,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2022-07-12 10:31:42,196 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-12 10:31:42,197 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2022-07-12 10:31:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,198 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:42,198 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:42,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:31:42,198 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 1 more)] === [2022-07-12 10:31:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash -962340754, now seen corresponding path program 1 times [2022-07-12 10:31:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:42,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19267893] [2022-07-12 10:31:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:31:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19267893] [2022-07-12 10:31:42,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19267893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:42,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:42,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:31:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759865048] [2022-07-12 10:31:42,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:42,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:31:42,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:31:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:31:42,344 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2022-07-12 10:31:42,345 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,345 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:42,345 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2022-07-12 10:31:42,345 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:42,476 INFO L129 PetriNetUnfolder]: 92/479 cut-off events. [2022-07-12 10:31:42,476 INFO L130 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2022-07-12 10:31:42,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 479 events. 92/479 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1563 event pairs, 50 based on Foata normal form. 15/452 useless extension candidates. Maximal degree in co-relation 775. Up to 115 conditions per place. [2022-07-12 10:31:42,479 INFO L132 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2022-07-12 10:31:42,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2022-07-12 10:31:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:31:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:31:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2022-07-12 10:31:42,482 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2022-07-12 10:31:42,482 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2022-07-12 10:31:42,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2022-07-12 10:31:42,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:42,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2022-07-12 10:31:42,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,487 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,487 INFO L186 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2022-07-12 10:31:42,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2022-07-12 10:31:42,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-12 10:31:42,493 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2022-07-12 10:31:42,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-07-12 10:31:42,495 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-07-12 10:31:42,495 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2022-07-12 10:31:42,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:42,496 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:42,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:31:42,497 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 1 more)] === [2022-07-12 10:31:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1575868577, now seen corresponding path program 1 times [2022-07-12 10:31:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:42,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269349919] [2022-07-12 10:31:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:42,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269349919] [2022-07-12 10:31:42,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269349919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:42,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:42,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:31:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460176204] [2022-07-12 10:31:42,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:42,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:31:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:31:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:31:42,661 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2022-07-12 10:31:42,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:42,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2022-07-12 10:31:42,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:42,725 INFO L129 PetriNetUnfolder]: 82/405 cut-off events. [2022-07-12 10:31:42,725 INFO L130 PetriNetUnfolder]: For 87/91 co-relation queries the response was YES. [2022-07-12 10:31:42,726 INFO L84 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 405 events. 82/405 cut-off events. For 87/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1106 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 647. Up to 81 conditions per place. [2022-07-12 10:31:42,728 INFO L132 encePairwiseOnDemand]: 206/211 looper letters, 20 selfloop transitions, 4 changer transitions 0/186 dead transitions. [2022-07-12 10:31:42,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 186 transitions, 474 flow [2022-07-12 10:31:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:31:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:31:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 741 transitions. [2022-07-12 10:31:42,730 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8779620853080569 [2022-07-12 10:31:42,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 741 transitions. [2022-07-12 10:31:42,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 741 transitions. [2022-07-12 10:31:42,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:42,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 741 transitions. [2022-07-12 10:31:42,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.25) internal successors, (741), 4 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,738 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 4 states and 741 transitions. [2022-07-12 10:31:42,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 186 transitions, 474 flow [2022-07-12 10:31:42,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 186 transitions, 464 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:31:42,741 INFO L242 Difference]: Finished difference. Result has 188 places, 181 transitions, 412 flow [2022-07-12 10:31:42,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=412, PETRI_PLACES=188, PETRI_TRANSITIONS=181} [2022-07-12 10:31:42,747 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2022-07-12 10:31:42,747 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 181 transitions, 412 flow [2022-07-12 10:31:42,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:42,748 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:42,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:31:42,748 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 1 more)] === [2022-07-12 10:31:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:42,748 INFO L85 PathProgramCache]: Analyzing trace with hash -953166579, now seen corresponding path program 2 times [2022-07-12 10:31:42,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:42,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802281875] [2022-07-12 10:31:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:42,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:42,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:42,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802281875] [2022-07-12 10:31:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802281875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:42,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:42,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:31:42,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125956446] [2022-07-12 10:31:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:42,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:31:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:31:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:31:42,914 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2022-07-12 10:31:42,915 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 181 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:42,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2022-07-12 10:31:42,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:42,960 INFO L129 PetriNetUnfolder]: 58/357 cut-off events. [2022-07-12 10:31:42,961 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-07-12 10:31:42,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 357 events. 58/357 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 837 event pairs, 15 based on Foata normal form. 2/338 useless extension candidates. Maximal degree in co-relation 579. Up to 90 conditions per place. [2022-07-12 10:31:42,963 INFO L132 encePairwiseOnDemand]: 205/211 looper letters, 18 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2022-07-12 10:31:42,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 185 transitions, 472 flow [2022-07-12 10:31:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:31:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:31:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2022-07-12 10:31:42,965 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8755924170616114 [2022-07-12 10:31:42,965 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2022-07-12 10:31:42,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2022-07-12 10:31:42,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:42,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2022-07-12 10:31:42,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,969 INFO L186 Difference]: Start difference. First operand has 188 places, 181 transitions, 412 flow. Second operand 4 states and 739 transitions. [2022-07-12 10:31:42,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 185 transitions, 472 flow [2022-07-12 10:31:42,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 185 transitions, 460 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-07-12 10:31:42,973 INFO L242 Difference]: Finished difference. Result has 189 places, 183 transitions, 427 flow [2022-07-12 10:31:42,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=427, PETRI_PLACES=189, PETRI_TRANSITIONS=183} [2022-07-12 10:31:42,976 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2022-07-12 10:31:42,976 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 183 transitions, 427 flow [2022-07-12 10:31:42,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:42,977 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:42,977 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:42,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:31:42,977 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 1 more)] === [2022-07-12 10:31:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1010485723, now seen corresponding path program 3 times [2022-07-12 10:31:42,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:42,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643294514] [2022-07-12 10:31:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:42,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:46,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643294514] [2022-07-12 10:31:46,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643294514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999888023] [2022-07-12 10:31:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:31:46,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:46,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:31:46,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:31:46,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-12 10:31:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:31:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:31:48,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:31:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:31:48,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:31:48,766 INFO L356 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2022-07-12 10:31:48,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 34 [2022-07-12 10:31:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:31:48,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:31:48,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999888023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:48,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:31:48,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [44] total 61 [2022-07-12 10:31:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442987306] [2022-07-12 10:31:48,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:48,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:31:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:31:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3419, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 10:31:48,919 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 211 [2022-07-12 10:31:48,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 183 transitions, 427 flow. Second operand has 23 states, 23 states have (on average 103.65217391304348) internal successors, (2384), 23 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:48,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:48,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 211 [2022-07-12 10:31:48,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:50,148 INFO L129 PetriNetUnfolder]: 1002/2143 cut-off events. [2022-07-12 10:31:50,149 INFO L130 PetriNetUnfolder]: For 1097/1169 co-relation queries the response was YES. [2022-07-12 10:31:50,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4652 conditions, 2143 events. 1002/2143 cut-off events. For 1097/1169 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12007 event pairs, 84 based on Foata normal form. 1/1943 useless extension candidates. Maximal degree in co-relation 4643. Up to 794 conditions per place. [2022-07-12 10:31:50,162 INFO L132 encePairwiseOnDemand]: 175/211 looper letters, 142 selfloop transitions, 56 changer transitions 4/295 dead transitions. [2022-07-12 10:31:50,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 295 transitions, 1138 flow [2022-07-12 10:31:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:31:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-12 10:31:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3002 transitions. [2022-07-12 10:31:50,168 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.508124576844956 [2022-07-12 10:31:50,168 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3002 transitions. [2022-07-12 10:31:50,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3002 transitions. [2022-07-12 10:31:50,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:50,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3002 transitions. [2022-07-12 10:31:50,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 107.21428571428571) internal successors, (3002), 28 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 211.0) internal successors, (6119), 29 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,181 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 211.0) internal successors, (6119), 29 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,181 INFO L186 Difference]: Start difference. First operand has 189 places, 183 transitions, 427 flow. Second operand 28 states and 3002 transitions. [2022-07-12 10:31:50,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 295 transitions, 1138 flow [2022-07-12 10:31:50,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 295 transitions, 1131 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:31:50,214 INFO L242 Difference]: Finished difference. Result has 223 places, 218 transitions, 736 flow [2022-07-12 10:31:50,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=736, PETRI_PLACES=223, PETRI_TRANSITIONS=218} [2022-07-12 10:31:50,215 INFO L279 CegarLoopForPetriNet]: 189 programPoint places, 34 predicate places. [2022-07-12 10:31:50,215 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 218 transitions, 736 flow [2022-07-12 10:31:50,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 103.65217391304348) internal successors, (2384), 23 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:50,216 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:50,216 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:50,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:50,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 10:31:50,424 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 1 more)] === [2022-07-12 10:31:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2007408495, now seen corresponding path program 4 times [2022-07-12 10:31:50,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107543706] [2022-07-12 10:31:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:50,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:52,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:52,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107543706] [2022-07-12 10:31:52,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107543706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:52,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566333074] [2022-07-12 10:31:52,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:31:52,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:52,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:52,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:31:52,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:31:52,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:31:52,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-12 10:31:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:54,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:31:55,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:31:55,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:31:55,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-12 10:31:55,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:55,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 33 [2022-07-12 10:31:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:56,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:59,223 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:59,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 202 treesize of output 142 [2022-07-12 10:31:59,293 INFO L356 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-07-12 10:31:59,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8472 treesize of output 7992 [2022-07-12 10:31:59,362 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:59,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 7896 treesize of output 6264 [2022-07-12 10:31:59,429 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:59,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6168 treesize of output 5400 [2022-07-12 10:31:59,506 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:31:59,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5304 treesize of output 4968 [2022-07-12 10:34:39,154 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:34:39,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 203 treesize of output 143 [2022-07-12 10:34:39,232 INFO L356 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2022-07-12 10:34:39,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4386 treesize of output 4186 [2022-07-12 10:34:39,304 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:34:39,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3971 treesize of output 3845 [2022-07-12 10:34:39,369 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:34:39,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3868 treesize of output 3520 [2022-07-12 10:34:39,439 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:34:39,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3424 treesize of output 2632