./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:35:50,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:35:50,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:35:50,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:35:50,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:35:50,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:35:50,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:35:50,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:35:50,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:35:50,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:35:50,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:35:50,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:35:50,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:35:50,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:35:50,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:35:50,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:35:50,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:35:50,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:35:50,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:35:50,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:35:50,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:35:50,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:35:50,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:35:50,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:35:50,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:35:50,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:35:50,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:35:50,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:35:50,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:35:50,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:35:50,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:35:50,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:35:50,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:35:50,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:35:50,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:35:50,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:35:50,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:35:50,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:35:50,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:35:50,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:35:50,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:35:50,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:35:50,568 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:35:50,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:35:50,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:35:50,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:35:50,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:35:50,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:35:50,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:35:50,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:35:50,572 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:35:50,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:35:50,573 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:35:50,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:35:50,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:35:50,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:35:50,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:35:50,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:35:50,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:35:50,575 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:35:50,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:35:50,575 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:35:50,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:35:50,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:35:50,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:35:50,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:35:50,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:35:50,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:35:50,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:35:50,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:35:50,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:35:50,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:35:50,577 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:35:50,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:35:50,578 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:35:50,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:35:50,578 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:35:50,579 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:35:50,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:35:50,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:35:50,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:35:50,935 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:35:50,935 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:35:50,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-09-01 14:35:52,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:35:52,464 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:35:52,465 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-09-01 14:35:52,473 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6953f5b5b/3010ded0932d40e39661fc57810b5e4c/FLAG5799167d2 [2023-09-01 14:35:52,497 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6953f5b5b/3010ded0932d40e39661fc57810b5e4c [2023-09-01 14:35:52,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:35:52,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:35:52,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:35:52,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:35:52,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:35:52,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c4edf32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52, skipping insertion in model container [2023-09-01 14:35:52,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:35:52,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:35:52,706 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-09-01 14:35:52,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:35:52,729 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:35:52,765 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-09-01 14:35:52,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:35:52,778 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:35:52,780 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:35:52,786 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:35:52,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52 WrapperNode [2023-09-01 14:35:52,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:35:52,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:35:52,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:35:52,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:35:52,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,850 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-09-01 14:35:52,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:35:52,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:35:52,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:35:52,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:35:52,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,894 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:35:52,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:35:52,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:35:52,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:35:52,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (1/1) ... [2023-09-01 14:35:52,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:35:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:52,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:35:52,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:35:52,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:35:52,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:35:52,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:35:52,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:35:52,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:35:52,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:35:52,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:35:52,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:35:52,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:35:52,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:35:52,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:35:52,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:35:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:35:52,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:35:52,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:35:52,988 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:35:53,097 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:35:53,099 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:35:53,391 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:35:53,511 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:35:53,512 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:35:53,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:35:53 BoogieIcfgContainer [2023-09-01 14:35:53,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:35:53,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:35:53,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:35:53,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:35:53,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:35:52" (1/3) ... [2023-09-01 14:35:53,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157ea1dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:35:53, skipping insertion in model container [2023-09-01 14:35:53,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:35:52" (2/3) ... [2023-09-01 14:35:53,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157ea1dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:35:53, skipping insertion in model container [2023-09-01 14:35:53,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:35:53" (3/3) ... [2023-09-01 14:35:53,526 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-09-01 14:35:53,533 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:35:53,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:35:53,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:35:53,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:35:53,630 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:35:53,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 246 flow [2023-09-01 14:35:53,743 INFO L130 PetriNetUnfolder]: 9/113 cut-off events. [2023-09-01 14:35:53,743 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:35:53,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 9/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-09-01 14:35:53,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 246 flow [2023-09-01 14:35:53,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2023-09-01 14:35:53,756 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:35:53,771 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2023-09-01 14:35:53,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2023-09-01 14:35:53,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2023-09-01 14:35:53,812 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2023-09-01 14:35:53,812 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:35:53,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-09-01 14:35:53,815 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-09-01 14:35:57,414 INFO L134 LiptonReduction]: Checked pairs total: 467 [2023-09-01 14:35:57,414 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-09-01 14:35:57,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:35:57,430 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@bf586f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:35:57,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:35:57,434 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-09-01 14:35:57,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:35:57,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:57,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:57,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:57,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1505763338, now seen corresponding path program 1 times [2023-09-01 14:35:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056925133] [2023-09-01 14:35:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:57,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056925133] [2023-09-01 14:35:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056925133] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:35:57,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:35:57,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:35:57,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197084407] [2023-09-01 14:35:57,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:35:57,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:35:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:35:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:35:57,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 224 [2023-09-01 14:35:57,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:57,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:57,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 224 [2023-09-01 14:35:57,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:58,032 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2023-09-01 14:35:58,033 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-09-01 14:35:58,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 133 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-09-01 14:35:58,036 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-09-01 14:35:58,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-09-01 14:35:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:35:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:35:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-09-01 14:35:58,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2023-09-01 14:35:58,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-09-01 14:35:58,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-09-01 14:35:58,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:58,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-09-01 14:35:58,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,065 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 324 transitions. [2023-09-01 14:35:58,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-09-01 14:35:58,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:35:58,069 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-09-01 14:35:58,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-09-01 14:35:58,073 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-09-01 14:35:58,074 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-09-01 14:35:58,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:58,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:58,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:35:58,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:58,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336325, now seen corresponding path program 1 times [2023-09-01 14:35:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443371171] [2023-09-01 14:35:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:58,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443371171] [2023-09-01 14:35:58,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443371171] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:35:58,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:35:58,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:35:58,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458312196] [2023-09-01 14:35:58,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:35:58,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:35:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:35:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:35:58,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 14:35:58,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:58,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 14:35:58,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:58,316 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2023-09-01 14:35:58,316 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 14:35:58,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 257 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-09-01 14:35:58,318 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-09-01 14:35:58,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-09-01 14:35:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:35:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:35:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-09-01 14:35:58,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46577380952380953 [2023-09-01 14:35:58,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-09-01 14:35:58,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-09-01 14:35:58,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:58,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-09-01 14:35:58,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,331 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 313 transitions. [2023-09-01 14:35:58,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-09-01 14:35:58,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:35:58,332 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-09-01 14:35:58,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-09-01 14:35:58,333 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-09-01 14:35:58,333 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-09-01 14:35:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:58,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:58,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:35:58,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:58,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash -128502642, now seen corresponding path program 1 times [2023-09-01 14:35:58,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739965311] [2023-09-01 14:35:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:58,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:35:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739965311] [2023-09-01 14:35:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739965311] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:35:58,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:35:58,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:35:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631937548] [2023-09-01 14:35:58,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:35:58,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:35:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:35:58,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:35:58,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 14:35:58,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:58,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 14:35:58,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:58,545 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-09-01 14:35:58,545 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-09-01 14:35:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-09-01 14:35:58,547 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-09-01 14:35:58,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-09-01 14:35:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:35:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:35:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-09-01 14:35:58,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2023-09-01 14:35:58,550 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-09-01 14:35:58,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-09-01 14:35:58,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:58,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-09-01 14:35:58,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,554 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 411 transitions. [2023-09-01 14:35:58,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-09-01 14:35:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:35:58,556 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-09-01 14:35:58,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-09-01 14:35:58,558 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-09-01 14:35:58,561 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-09-01 14:35:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:58,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:58,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:35:58,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:58,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1064831031, now seen corresponding path program 1 times [2023-09-01 14:35:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:58,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461746369] [2023-09-01 14:35:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461746369] [2023-09-01 14:35:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461746369] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234903813] [2023-09-01 14:35:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:59,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:59,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:35:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 14:35:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:35:59,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:35:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:35:59,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 14:35:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:59,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:59,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:59,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-09-01 14:35:59,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:59,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-09-01 14:35:59,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:59,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2023-09-01 14:35:59,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-09-01 14:35:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234903813] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:59,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:59,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-09-01 14:35:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736536732] [2023-09-01 14:35:59,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 14:35:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 14:35:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=209, Unknown=4, NotChecked=0, Total=272 [2023-09-01 14:36:00,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 224 [2023-09-01 14:36:00,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:00,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:00,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 224 [2023-09-01 14:36:00,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:02,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:36:03,076 INFO L130 PetriNetUnfolder]: 225/436 cut-off events. [2023-09-01 14:36:03,077 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2023-09-01 14:36:03,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 436 events. 225/436 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1877 event pairs, 25 based on Foata normal form. 3/435 useless extension candidates. Maximal degree in co-relation 1067. Up to 120 conditions per place. [2023-09-01 14:36:03,079 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 74 selfloop transitions, 26 changer transitions 24/124 dead transitions. [2023-09-01 14:36:03,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 124 transitions, 628 flow [2023-09-01 14:36:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:36:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:36:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1295 transitions. [2023-09-01 14:36:03,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3211805555555556 [2023-09-01 14:36:03,085 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1295 transitions. [2023-09-01 14:36:03,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1295 transitions. [2023-09-01 14:36:03,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:03,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1295 transitions. [2023-09-01 14:36:03,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.94444444444444) internal successors, (1295), 18 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,099 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,099 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 18 states and 1295 transitions. [2023-09-01 14:36:03,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 124 transitions, 628 flow [2023-09-01 14:36:03,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 124 transitions, 614 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 14:36:03,103 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 266 flow [2023-09-01 14:36:03,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=266, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-09-01 14:36:03,105 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 27 predicate places. [2023-09-01 14:36:03,105 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 266 flow [2023-09-01 14:36:03,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:03,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:03,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 14:36:03,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:03,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:03,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1849941358, now seen corresponding path program 2 times [2023-09-01 14:36:03,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637674163] [2023-09-01 14:36:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637674163] [2023-09-01 14:36:04,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637674163] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502468095] [2023-09-01 14:36:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:36:04,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:04,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:04,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:36:04,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:36:04,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 14:36:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:04,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:04,523 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:36:04,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:36:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:36:04,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502468095] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:04,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:04,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-09-01 14:36:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486597406] [2023-09-01 14:36:04,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:04,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 14:36:04,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 14:36:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-09-01 14:36:04,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-09-01 14:36:04,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 85.72727272727273) internal successors, (943), 11 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:04,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:04,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-09-01 14:36:04,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:05,098 INFO L130 PetriNetUnfolder]: 363/688 cut-off events. [2023-09-01 14:36:05,098 INFO L131 PetriNetUnfolder]: For 1019/1019 co-relation queries the response was YES. [2023-09-01 14:36:05,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 688 events. 363/688 cut-off events. For 1019/1019 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3374 event pairs, 65 based on Foata normal form. 1/687 useless extension candidates. Maximal degree in co-relation 1926. Up to 234 conditions per place. [2023-09-01 14:36:05,107 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 51 selfloop transitions, 27 changer transitions 16/94 dead transitions. [2023-09-01 14:36:05,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 94 transitions, 679 flow [2023-09-01 14:36:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-09-01 14:36:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-09-01 14:36:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 897 transitions. [2023-09-01 14:36:05,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004464285714286 [2023-09-01 14:36:05,110 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 897 transitions. [2023-09-01 14:36:05,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 897 transitions. [2023-09-01 14:36:05,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:05,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 897 transitions. [2023-09-01 14:36:05,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.7) internal successors, (897), 10 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:05,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:05,118 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:05,118 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 266 flow. Second operand 10 states and 897 transitions. [2023-09-01 14:36:05,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 94 transitions, 679 flow [2023-09-01 14:36:05,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 94 transitions, 633 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-09-01 14:36:05,128 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 408 flow [2023-09-01 14:36:05,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=408, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-09-01 14:36:05,130 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 37 predicate places. [2023-09-01 14:36:05,130 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 408 flow [2023-09-01 14:36:05,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 85.72727272727273) internal successors, (943), 11 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:05,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:05,131 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:05,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:05,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:05,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:05,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1698945970, now seen corresponding path program 3 times [2023-09-01 14:36:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:05,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406750381] [2023-09-01 14:36:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:05,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:05,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406750381] [2023-09-01 14:36:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406750381] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207426094] [2023-09-01 14:36:05,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:36:05,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:05,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:05,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:36:05,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:36:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 14:36:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:05,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:05,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207426094] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:05,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:05,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-09-01 14:36:05,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919192828] [2023-09-01 14:36:05,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:36:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:36:05,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:36:05,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2023-09-01 14:36:05,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 92.8) internal successors, (1392), 15 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:05,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:05,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2023-09-01 14:36:05,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:06,292 INFO L130 PetriNetUnfolder]: 431/861 cut-off events. [2023-09-01 14:36:06,293 INFO L131 PetriNetUnfolder]: For 2092/2092 co-relation queries the response was YES. [2023-09-01 14:36:06,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 conditions, 861 events. 431/861 cut-off events. For 2092/2092 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4696 event pairs, 114 based on Foata normal form. 58/918 useless extension candidates. Maximal degree in co-relation 2846. Up to 268 conditions per place. [2023-09-01 14:36:06,298 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 48 selfloop transitions, 16 changer transitions 31/95 dead transitions. [2023-09-01 14:36:06,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 95 transitions, 787 flow [2023-09-01 14:36:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 14:36:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 14:36:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 878 transitions. [2023-09-01 14:36:06,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435515873015873 [2023-09-01 14:36:06,301 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 878 transitions. [2023-09-01 14:36:06,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 878 transitions. [2023-09-01 14:36:06,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:06,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 878 transitions. [2023-09-01 14:36:06,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.55555555555556) internal successors, (878), 9 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:06,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:06,309 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:06,310 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 408 flow. Second operand 9 states and 878 transitions. [2023-09-01 14:36:06,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 95 transitions, 787 flow [2023-09-01 14:36:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 95 transitions, 739 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-09-01 14:36:06,318 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 407 flow [2023-09-01 14:36:06,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-09-01 14:36:06,320 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 39 predicate places. [2023-09-01 14:36:06,320 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 407 flow [2023-09-01 14:36:06,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 92.8) internal successors, (1392), 15 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:06,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:06,323 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:06,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:06,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:06,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:06,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash 532059832, now seen corresponding path program 4 times [2023-09-01 14:36:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106513376] [2023-09-01 14:36:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:07,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:07,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106513376] [2023-09-01 14:36:07,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106513376] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230404997] [2023-09-01 14:36:07,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:36:07,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:07,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:07,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:36:07,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:36:07,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:07,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 31 conjunts are in the unsatisfiable core [2023-09-01 14:36:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:07,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:07,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:36:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:07,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:07,726 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_180 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-09-01 14:36:07,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:07,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-09-01 14:36:07,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-09-01 14:36:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:36:07,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230404997] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:07,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:07,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 18 [2023-09-01 14:36:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277802878] [2023-09-01 14:36:07,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:36:07,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:36:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=282, Unknown=1, NotChecked=34, Total=380 [2023-09-01 14:36:07,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-09-01 14:36:07,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 407 flow. Second operand has 20 states, 20 states have (on average 68.75) internal successors, (1375), 20 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:07,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:07,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-09-01 14:36:07,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:08,613 INFO L130 PetriNetUnfolder]: 491/936 cut-off events. [2023-09-01 14:36:08,613 INFO L131 PetriNetUnfolder]: For 3109/3109 co-relation queries the response was YES. [2023-09-01 14:36:08,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 936 events. 491/936 cut-off events. For 3109/3109 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4898 event pairs, 99 based on Foata normal form. 3/937 useless extension candidates. Maximal degree in co-relation 3474. Up to 285 conditions per place. [2023-09-01 14:36:08,619 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 57 selfloop transitions, 44 changer transitions 30/131 dead transitions. [2023-09-01 14:36:08,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 131 transitions, 1127 flow [2023-09-01 14:36:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:36:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:36:08,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1041 transitions. [2023-09-01 14:36:08,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3319515306122449 [2023-09-01 14:36:08,623 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1041 transitions. [2023-09-01 14:36:08,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1041 transitions. [2023-09-01 14:36:08,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:08,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1041 transitions. [2023-09-01 14:36:08,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 74.35714285714286) internal successors, (1041), 14 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:08,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:08,631 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:08,631 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 407 flow. Second operand 14 states and 1041 transitions. [2023-09-01 14:36:08,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 131 transitions, 1127 flow [2023-09-01 14:36:08,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 131 transitions, 1041 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-09-01 14:36:08,643 INFO L231 Difference]: Finished difference. Result has 64 places, 68 transitions, 759 flow [2023-09-01 14:36:08,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=759, PETRI_PLACES=64, PETRI_TRANSITIONS=68} [2023-09-01 14:36:08,644 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-09-01 14:36:08,644 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 68 transitions, 759 flow [2023-09-01 14:36:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.75) internal successors, (1375), 20 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:08,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:08,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:08,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:08,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:08,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:08,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 301439904, now seen corresponding path program 5 times [2023-09-01 14:36:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182194440] [2023-09-01 14:36:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:09,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182194440] [2023-09-01 14:36:09,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182194440] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046307912] [2023-09-01 14:36:09,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:36:09,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:09,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:09,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:36:09,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:36:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 14:36:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:09,662 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:36:09,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:36:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046307912] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:09,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:09,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-09-01 14:36:09,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23897707] [2023-09-01 14:36:09,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:09,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:36:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:36:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-09-01 14:36:10,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:36:10,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 759 flow. Second operand has 24 states, 24 states have (on average 84.0) internal successors, (2016), 24 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:10,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:10,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:36:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:11,920 INFO L130 PetriNetUnfolder]: 1166/2194 cut-off events. [2023-09-01 14:36:11,920 INFO L131 PetriNetUnfolder]: For 9015/9015 co-relation queries the response was YES. [2023-09-01 14:36:11,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10325 conditions, 2194 events. 1166/2194 cut-off events. For 9015/9015 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13888 event pairs, 115 based on Foata normal form. 11/2205 useless extension candidates. Maximal degree in co-relation 7955. Up to 1171 conditions per place. [2023-09-01 14:36:11,933 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 165 selfloop transitions, 96 changer transitions 68/329 dead transitions. [2023-09-01 14:36:11,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 329 transitions, 3106 flow [2023-09-01 14:36:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 14:36:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 14:36:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3067 transitions. [2023-09-01 14:36:11,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027048319327731 [2023-09-01 14:36:11,943 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3067 transitions. [2023-09-01 14:36:11,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3067 transitions. [2023-09-01 14:36:11,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:11,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3067 transitions. [2023-09-01 14:36:11,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 90.20588235294117) internal successors, (3067), 34 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:11,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:11,963 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:11,963 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 759 flow. Second operand 34 states and 3067 transitions. [2023-09-01 14:36:11,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 329 transitions, 3106 flow [2023-09-01 14:36:11,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 329 transitions, 2981 flow, removed 31 selfloop flow, removed 6 redundant places. [2023-09-01 14:36:11,984 INFO L231 Difference]: Finished difference. Result has 109 places, 127 transitions, 1765 flow [2023-09-01 14:36:11,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1765, PETRI_PLACES=109, PETRI_TRANSITIONS=127} [2023-09-01 14:36:11,986 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 90 predicate places. [2023-09-01 14:36:11,986 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 127 transitions, 1765 flow [2023-09-01 14:36:11,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.0) internal successors, (2016), 24 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:11,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:11,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:11,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:12,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:12,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:12,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1519550220, now seen corresponding path program 6 times [2023-09-01 14:36:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:12,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577873692] [2023-09-01 14:36:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:12,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:12,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577873692] [2023-09-01 14:36:12,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577873692] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:12,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084586931] [2023-09-01 14:36:12,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:36:12,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:12,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:12,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:36:12,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:36:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:36:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:12,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:36:13,150 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:36:13,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:36:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:13,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:13,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:36:13,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:36:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:13,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084586931] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:13,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:13,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-09-01 14:36:13,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119339873] [2023-09-01 14:36:13,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:13,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:36:13,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:36:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=601, Unknown=6, NotChecked=0, Total=702 [2023-09-01 14:36:14,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 224 [2023-09-01 14:36:14,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 127 transitions, 1765 flow. Second operand has 27 states, 27 states have (on average 80.77777777777777) internal successors, (2181), 27 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:14,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:14,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 224 [2023-09-01 14:36:14,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:17,331 INFO L130 PetriNetUnfolder]: 1806/3364 cut-off events. [2023-09-01 14:36:17,331 INFO L131 PetriNetUnfolder]: For 35113/35113 co-relation queries the response was YES. [2023-09-01 14:36:17,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20050 conditions, 3364 events. 1806/3364 cut-off events. For 35113/35113 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21390 event pairs, 275 based on Foata normal form. 15/3379 useless extension candidates. Maximal degree in co-relation 17662. Up to 1731 conditions per place. [2023-09-01 14:36:17,361 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 172 selfloop transitions, 128 changer transitions 38/338 dead transitions. [2023-09-01 14:36:17,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 338 transitions, 4506 flow [2023-09-01 14:36:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 14:36:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 14:36:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2349 transitions. [2023-09-01 14:36:17,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2023-09-01 14:36:17,367 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2349 transitions. [2023-09-01 14:36:17,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2349 transitions. [2023-09-01 14:36:17,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:17,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2349 transitions. [2023-09-01 14:36:17,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 87.0) internal successors, (2349), 27 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:17,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:17,380 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:17,380 INFO L175 Difference]: Start difference. First operand has 109 places, 127 transitions, 1765 flow. Second operand 27 states and 2349 transitions. [2023-09-01 14:36:17,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 338 transitions, 4506 flow [2023-09-01 14:36:17,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 338 transitions, 4018 flow, removed 239 selfloop flow, removed 4 redundant places. [2023-09-01 14:36:17,457 INFO L231 Difference]: Finished difference. Result has 141 places, 194 transitions, 2967 flow [2023-09-01 14:36:17,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2967, PETRI_PLACES=141, PETRI_TRANSITIONS=194} [2023-09-01 14:36:17,458 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 122 predicate places. [2023-09-01 14:36:17,458 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 194 transitions, 2967 flow [2023-09-01 14:36:17,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.77777777777777) internal successors, (2181), 27 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:17,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:17,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:17,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:17,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:17,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:17,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash 754252085, now seen corresponding path program 7 times [2023-09-01 14:36:17,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:17,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443104392] [2023-09-01 14:36:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:17,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:36:17,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443104392] [2023-09-01 14:36:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443104392] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609236635] [2023-09-01 14:36:17,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:36:17,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:17,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:17,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:17,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:36:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:36:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:18,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609236635] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:18,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-09-01 14:36:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945581683] [2023-09-01 14:36:18,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:18,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:36:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:36:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:36:18,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2023-09-01 14:36:18,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 194 transitions, 2967 flow. Second operand has 20 states, 20 states have (on average 92.5) internal successors, (1850), 20 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:18,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:18,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2023-09-01 14:36:18,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:19,042 INFO L130 PetriNetUnfolder]: 1522/2901 cut-off events. [2023-09-01 14:36:19,042 INFO L131 PetriNetUnfolder]: For 31333/31333 co-relation queries the response was YES. [2023-09-01 14:36:19,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17119 conditions, 2901 events. 1522/2901 cut-off events. For 31333/31333 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19543 event pairs, 318 based on Foata normal form. 66/2967 useless extension candidates. Maximal degree in co-relation 16783. Up to 1550 conditions per place. [2023-09-01 14:36:19,060 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 74 selfloop transitions, 56 changer transitions 90/220 dead transitions. [2023-09-01 14:36:19,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 3105 flow [2023-09-01 14:36:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 14:36:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 14:36:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1365 transitions. [2023-09-01 14:36:19,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43526785714285715 [2023-09-01 14:36:19,063 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1365 transitions. [2023-09-01 14:36:19,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1365 transitions. [2023-09-01 14:36:19,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:19,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1365 transitions. [2023-09-01 14:36:19,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:19,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:19,069 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:19,069 INFO L175 Difference]: Start difference. First operand has 141 places, 194 transitions, 2967 flow. Second operand 14 states and 1365 transitions. [2023-09-01 14:36:19,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 3105 flow [2023-09-01 14:36:19,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 220 transitions, 2726 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-09-01 14:36:19,182 INFO L231 Difference]: Finished difference. Result has 125 places, 104 transitions, 1485 flow [2023-09-01 14:36:19,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1485, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2023-09-01 14:36:19,183 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 106 predicate places. [2023-09-01 14:36:19,184 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 1485 flow [2023-09-01 14:36:19,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 92.5) internal successors, (1850), 20 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:19,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:19,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:19,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:19,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:19,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:19,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:19,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1258191663, now seen corresponding path program 8 times [2023-09-01 14:36:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:19,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592083023] [2023-09-01 14:36:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:19,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:20,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:20,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592083023] [2023-09-01 14:36:20,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592083023] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:20,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592777833] [2023-09-01 14:36:20,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:36:20,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:20,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:20,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:36:20,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:36:20,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 14:36:20,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:36:20,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:20,247 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:36:20,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:36:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:36:20,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592777833] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:20,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:20,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 14 [2023-09-01 14:36:20,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112865111] [2023-09-01 14:36:20,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:20,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 14:36:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 14:36:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-09-01 14:36:20,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-09-01 14:36:20,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 104 transitions, 1485 flow. Second operand has 16 states, 16 states have (on average 86.0625) internal successors, (1377), 16 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:20,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:20,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-09-01 14:36:20,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:21,415 INFO L130 PetriNetUnfolder]: 1254/2352 cut-off events. [2023-09-01 14:36:21,415 INFO L131 PetriNetUnfolder]: For 16678/16678 co-relation queries the response was YES. [2023-09-01 14:36:21,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13171 conditions, 2352 events. 1254/2352 cut-off events. For 16678/16678 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15089 event pairs, 180 based on Foata normal form. 11/2363 useless extension candidates. Maximal degree in co-relation 13135. Up to 1247 conditions per place. [2023-09-01 14:36:21,432 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 97 selfloop transitions, 83 changer transitions 70/250 dead transitions. [2023-09-01 14:36:21,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 250 transitions, 3074 flow [2023-09-01 14:36:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:36:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:36:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2104 transitions. [2023-09-01 14:36:21,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083850931677019 [2023-09-01 14:36:21,440 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2104 transitions. [2023-09-01 14:36:21,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2104 transitions. [2023-09-01 14:36:21,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:21,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2104 transitions. [2023-09-01 14:36:21,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 91.47826086956522) internal successors, (2104), 23 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,450 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,451 INFO L175 Difference]: Start difference. First operand has 125 places, 104 transitions, 1485 flow. Second operand 23 states and 2104 transitions. [2023-09-01 14:36:21,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 250 transitions, 3074 flow [2023-09-01 14:36:21,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 250 transitions, 2771 flow, removed 102 selfloop flow, removed 18 redundant places. [2023-09-01 14:36:21,487 INFO L231 Difference]: Finished difference. Result has 96 places, 124 transitions, 1878 flow [2023-09-01 14:36:21,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1878, PETRI_PLACES=96, PETRI_TRANSITIONS=124} [2023-09-01 14:36:21,488 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 77 predicate places. [2023-09-01 14:36:21,489 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 124 transitions, 1878 flow [2023-09-01 14:36:21,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 86.0625) internal successors, (1377), 16 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:21,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:21,489 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:21,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 14:36:21,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:21,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1524792205, now seen corresponding path program 9 times [2023-09-01 14:36:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011519066] [2023-09-01 14:36:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:22,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:22,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011519066] [2023-09-01 14:36:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011519066] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:22,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204032885] [2023-09-01 14:36:22,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:36:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:22,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:22,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:22,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:36:22,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:36:22,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2023-09-01 14:36:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:22,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:22,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:36:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:36:22,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:22,779 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_360 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_360) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2023-09-01 14:36:22,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:22,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:36:22,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:36:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-09-01 14:36:22,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204032885] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:22,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:22,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 20 [2023-09-01 14:36:22,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099369871] [2023-09-01 14:36:22,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:36:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:36:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2023-09-01 14:36:22,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-09-01 14:36:22,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 124 transitions, 1878 flow. Second operand has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:22,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:22,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-09-01 14:36:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:24,008 INFO L130 PetriNetUnfolder]: 1464/2721 cut-off events. [2023-09-01 14:36:24,008 INFO L131 PetriNetUnfolder]: For 17360/17360 co-relation queries the response was YES. [2023-09-01 14:36:24,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14776 conditions, 2721 events. 1464/2721 cut-off events. For 17360/17360 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17672 event pairs, 190 based on Foata normal form. 4/2725 useless extension candidates. Maximal degree in co-relation 14744. Up to 1435 conditions per place. [2023-09-01 14:36:24,023 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 80 selfloop transitions, 112 changer transitions 38/230 dead transitions. [2023-09-01 14:36:24,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 230 transitions, 3177 flow [2023-09-01 14:36:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:36:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:36:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1256 transitions. [2023-09-01 14:36:24,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32983193277310924 [2023-09-01 14:36:24,026 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1256 transitions. [2023-09-01 14:36:24,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1256 transitions. [2023-09-01 14:36:24,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:24,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1256 transitions. [2023-09-01 14:36:24,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 73.88235294117646) internal successors, (1256), 17 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:24,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:24,032 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:24,032 INFO L175 Difference]: Start difference. First operand has 96 places, 124 transitions, 1878 flow. Second operand 17 states and 1256 transitions. [2023-09-01 14:36:24,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 230 transitions, 3177 flow [2023-09-01 14:36:24,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 230 transitions, 3103 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-09-01 14:36:24,063 INFO L231 Difference]: Finished difference. Result has 107 places, 145 transitions, 2447 flow [2023-09-01 14:36:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2447, PETRI_PLACES=107, PETRI_TRANSITIONS=145} [2023-09-01 14:36:24,064 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-09-01 14:36:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 145 transitions, 2447 flow [2023-09-01 14:36:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:24,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:24,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:24,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:24,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:24,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:24,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:24,271 INFO L85 PathProgramCache]: Analyzing trace with hash 970695111, now seen corresponding path program 10 times [2023-09-01 14:36:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:24,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044116927] [2023-09-01 14:36:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044116927] [2023-09-01 14:36:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044116927] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300145124] [2023-09-01 14:36:24,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:36:24,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:24,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:36:24,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:36:24,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:36:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:25,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:25,417 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:36:25,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:36:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:25,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300145124] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:25,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:25,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-09-01 14:36:25,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279490491] [2023-09-01 14:36:25,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:25,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:36:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:36:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2023-09-01 14:36:26,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:36:26,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 145 transitions, 2447 flow. Second operand has 33 states, 33 states have (on average 83.72727272727273) internal successors, (2763), 33 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:26,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:26,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:36:26,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:33,202 INFO L130 PetriNetUnfolder]: 3094/5758 cut-off events. [2023-09-01 14:36:33,202 INFO L131 PetriNetUnfolder]: For 46321/46321 co-relation queries the response was YES. [2023-09-01 14:36:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34485 conditions, 5758 events. 3094/5758 cut-off events. For 46321/46321 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42096 event pairs, 215 based on Foata normal form. 15/5773 useless extension candidates. Maximal degree in co-relation 34452. Up to 2887 conditions per place. [2023-09-01 14:36:33,241 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 411 selfloop transitions, 273 changer transitions 165/849 dead transitions. [2023-09-01 14:36:33,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 849 transitions, 10423 flow [2023-09-01 14:36:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-09-01 14:36:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-09-01 14:36:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7765 transitions. [2023-09-01 14:36:33,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40308347176079734 [2023-09-01 14:36:33,252 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7765 transitions. [2023-09-01 14:36:33,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7765 transitions. [2023-09-01 14:36:33,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:33,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7765 transitions. [2023-09-01 14:36:33,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 90.29069767441861) internal successors, (7765), 86 states have internal predecessors, (7765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:33,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 224.0) internal successors, (19488), 87 states have internal predecessors, (19488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:33,286 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 224.0) internal successors, (19488), 87 states have internal predecessors, (19488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:33,286 INFO L175 Difference]: Start difference. First operand has 107 places, 145 transitions, 2447 flow. Second operand 86 states and 7765 transitions. [2023-09-01 14:36:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 849 transitions, 10423 flow [2023-09-01 14:36:33,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 849 transitions, 9905 flow, removed 201 selfloop flow, removed 10 redundant places. [2023-09-01 14:36:33,354 INFO L231 Difference]: Finished difference. Result has 197 places, 325 transitions, 5515 flow [2023-09-01 14:36:33,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=5515, PETRI_PLACES=197, PETRI_TRANSITIONS=325} [2023-09-01 14:36:33,355 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 178 predicate places. [2023-09-01 14:36:33,355 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 325 transitions, 5515 flow [2023-09-01 14:36:33,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 83.72727272727273) internal successors, (2763), 33 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:33,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:33,356 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:33,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:33,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 14:36:33,562 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:33,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:33,563 INFO L85 PathProgramCache]: Analyzing trace with hash 65583399, now seen corresponding path program 11 times [2023-09-01 14:36:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:33,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193756214] [2023-09-01 14:36:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:34,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193756214] [2023-09-01 14:36:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193756214] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:34,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855570826] [2023-09-01 14:36:34,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:36:34,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:34,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:34,165 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:34,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:36:34,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:36:34,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2023-09-01 14:36:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:34,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:36:34,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:36:34,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:36:34,760 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:36:34,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:36:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:34,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:35,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:35,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-09-01 14:36:35,281 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:36:35,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 279 [2023-09-01 14:36:35,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:36:35,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 80 [2023-09-01 14:36:35,318 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-09-01 14:36:35,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 93 treesize of output 67 [2023-09-01 14:36:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855570826] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:35,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-09-01 14:36:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637660683] [2023-09-01 14:36:35,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:35,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:36:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:36:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1008, Unknown=1, NotChecked=0, Total=1190 [2023-09-01 14:36:36,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-09-01 14:36:36,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 325 transitions, 5515 flow. Second operand has 35 states, 35 states have (on average 65.62857142857143) internal successors, (2297), 35 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:36,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:36,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-09-01 14:36:36,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:41,704 INFO L130 PetriNetUnfolder]: 3623/6974 cut-off events. [2023-09-01 14:36:41,704 INFO L131 PetriNetUnfolder]: For 100797/100797 co-relation queries the response was YES. [2023-09-01 14:36:41,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43554 conditions, 6974 events. 3623/6974 cut-off events. For 100797/100797 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 51617 event pairs, 522 based on Foata normal form. 242/7216 useless extension candidates. Maximal degree in co-relation 43506. Up to 3584 conditions per place. [2023-09-01 14:36:41,754 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 394 selfloop transitions, 258 changer transitions 86/738 dead transitions. [2023-09-01 14:36:41,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 738 transitions, 11604 flow [2023-09-01 14:36:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-09-01 14:36:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-09-01 14:36:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4050 transitions. [2023-09-01 14:36:41,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32286352040816324 [2023-09-01 14:36:41,760 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4050 transitions. [2023-09-01 14:36:41,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4050 transitions. [2023-09-01 14:36:41,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:41,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4050 transitions. [2023-09-01 14:36:41,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 72.32142857142857) internal successors, (4050), 56 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:41,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 224.0) internal successors, (12768), 57 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:41,778 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 224.0) internal successors, (12768), 57 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:41,778 INFO L175 Difference]: Start difference. First operand has 197 places, 325 transitions, 5515 flow. Second operand 56 states and 4050 transitions. [2023-09-01 14:36:41,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 738 transitions, 11604 flow [2023-09-01 14:36:41,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 738 transitions, 9657 flow, removed 938 selfloop flow, removed 21 redundant places. [2023-09-01 14:36:41,981 INFO L231 Difference]: Finished difference. Result has 227 places, 374 transitions, 5874 flow [2023-09-01 14:36:41,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=5874, PETRI_PLACES=227, PETRI_TRANSITIONS=374} [2023-09-01 14:36:41,982 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 208 predicate places. [2023-09-01 14:36:41,982 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 374 transitions, 5874 flow [2023-09-01 14:36:41,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 65.62857142857143) internal successors, (2297), 35 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:41,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:41,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:41,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:42,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:36:42,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:42,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:42,189 INFO L85 PathProgramCache]: Analyzing trace with hash 36386247, now seen corresponding path program 12 times [2023-09-01 14:36:42,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:42,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173990523] [2023-09-01 14:36:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:42,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173990523] [2023-09-01 14:36:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173990523] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842699442] [2023-09-01 14:36:42,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:36:42,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:42,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:42,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:36:42,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:36:42,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 14:36:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:36:42,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:43,019 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:36:43,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:36:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:36:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842699442] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:43,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:43,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-09-01 14:36:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262794848] [2023-09-01 14:36:43,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 14:36:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 14:36:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-09-01 14:36:43,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-09-01 14:36:43,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 374 transitions, 5874 flow. Second operand has 17 states, 17 states have (on average 86.17647058823529) internal successors, (1465), 17 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:43,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:43,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-09-01 14:36:43,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:45,337 INFO L130 PetriNetUnfolder]: 4033/7694 cut-off events. [2023-09-01 14:36:45,337 INFO L131 PetriNetUnfolder]: For 110326/110326 co-relation queries the response was YES. [2023-09-01 14:36:45,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45341 conditions, 7694 events. 4033/7694 cut-off events. For 110326/110326 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 57230 event pairs, 692 based on Foata normal form. 45/7739 useless extension candidates. Maximal degree in co-relation 45278. Up to 3934 conditions per place. [2023-09-01 14:36:45,397 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 302 selfloop transitions, 228 changer transitions 123/653 dead transitions. [2023-09-01 14:36:45,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 653 transitions, 9644 flow [2023-09-01 14:36:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 14:36:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 14:36:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3676 transitions. [2023-09-01 14:36:45,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41026785714285713 [2023-09-01 14:36:45,402 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3676 transitions. [2023-09-01 14:36:45,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3676 transitions. [2023-09-01 14:36:45,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:45,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3676 transitions. [2023-09-01 14:36:45,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 91.9) internal successors, (3676), 40 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:45,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:45,417 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:45,417 INFO L175 Difference]: Start difference. First operand has 227 places, 374 transitions, 5874 flow. Second operand 40 states and 3676 transitions. [2023-09-01 14:36:45,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 653 transitions, 9644 flow [2023-09-01 14:36:45,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 653 transitions, 8876 flow, removed 346 selfloop flow, removed 12 redundant places. [2023-09-01 14:36:45,823 INFO L231 Difference]: Finished difference. Result has 259 places, 404 transitions, 6282 flow [2023-09-01 14:36:45,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5120, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6282, PETRI_PLACES=259, PETRI_TRANSITIONS=404} [2023-09-01 14:36:45,824 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 240 predicate places. [2023-09-01 14:36:45,824 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 404 transitions, 6282 flow [2023-09-01 14:36:45,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.17647058823529) internal successors, (1465), 17 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:45,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:45,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:45,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:36:46,025 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:46,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash -736098531, now seen corresponding path program 13 times [2023-09-01 14:36:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:46,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917332109] [2023-09-01 14:36:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:46,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917332109] [2023-09-01 14:36:46,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917332109] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317784400] [2023-09-01 14:36:46,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:36:46,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:46,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:46,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:46,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:36:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 14:36:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:47,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:36:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:47,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:47,319 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:47,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:36:47,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:36:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:47,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317784400] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:47,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-09-01 14:36:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269332498] [2023-09-01 14:36:47,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:47,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 14:36:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 14:36:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1105, Unknown=3, NotChecked=0, Total=1260 [2023-09-01 14:36:48,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 224 [2023-09-01 14:36:48,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 404 transitions, 6282 flow. Second operand has 36 states, 36 states have (on average 80.58333333333333) internal successors, (2901), 36 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:48,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:48,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 224 [2023-09-01 14:36:48,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:52,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:36:56,509 INFO L130 PetriNetUnfolder]: 7468/14164 cut-off events. [2023-09-01 14:36:56,509 INFO L131 PetriNetUnfolder]: For 230483/230483 co-relation queries the response was YES. [2023-09-01 14:36:56,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83597 conditions, 14164 events. 7468/14164 cut-off events. For 230483/230483 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 113372 event pairs, 1361 based on Foata normal form. 66/14230 useless extension candidates. Maximal degree in co-relation 83528. Up to 7127 conditions per place. [2023-09-01 14:36:56,882 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 472 selfloop transitions, 481 changer transitions 68/1021 dead transitions. [2023-09-01 14:36:56,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1021 transitions, 16064 flow [2023-09-01 14:36:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-09-01 14:36:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-09-01 14:36:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4070 transitions. [2023-09-01 14:36:56,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865881458966565 [2023-09-01 14:36:56,888 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4070 transitions. [2023-09-01 14:36:56,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4070 transitions. [2023-09-01 14:36:56,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:56,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4070 transitions. [2023-09-01 14:36:56,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 86.59574468085107) internal successors, (4070), 47 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:56,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 224.0) internal successors, (10752), 48 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:56,905 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 224.0) internal successors, (10752), 48 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:56,905 INFO L175 Difference]: Start difference. First operand has 259 places, 404 transitions, 6282 flow. Second operand 47 states and 4070 transitions. [2023-09-01 14:36:56,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1021 transitions, 16064 flow [2023-09-01 14:36:57,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 1021 transitions, 15254 flow, removed 130 selfloop flow, removed 22 redundant places. [2023-09-01 14:36:57,628 INFO L231 Difference]: Finished difference. Result has 292 places, 721 transitions, 12260 flow [2023-09-01 14:36:57,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=12260, PETRI_PLACES=292, PETRI_TRANSITIONS=721} [2023-09-01 14:36:57,629 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 273 predicate places. [2023-09-01 14:36:57,629 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 721 transitions, 12260 flow [2023-09-01 14:36:57,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 80.58333333333333) internal successors, (2901), 36 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:57,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:57,630 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:57,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:36:57,833 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:57,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2105413284, now seen corresponding path program 14 times [2023-09-01 14:36:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296809410] [2023-09-01 14:36:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296809410] [2023-09-01 14:36:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296809410] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411333463] [2023-09-01 14:36:58,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:36:58,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:58,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:58,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:36:58,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:36:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:36:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:36:59,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:59,084 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:36:59,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:36:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-09-01 14:36:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411333463] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:59,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:59,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 20 [2023-09-01 14:36:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045985896] [2023-09-01 14:36:59,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:59,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 14:36:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 14:36:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-09-01 14:36:59,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-09-01 14:36:59,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 721 transitions, 12260 flow. Second operand has 22 states, 22 states have (on average 85.77272727272727) internal successors, (1887), 22 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:59,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:59,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-09-01 14:36:59,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:04,474 INFO L130 PetriNetUnfolder]: 7988/15090 cut-off events. [2023-09-01 14:37:04,474 INFO L131 PetriNetUnfolder]: For 257197/257197 co-relation queries the response was YES. [2023-09-01 14:37:04,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92383 conditions, 15090 events. 7988/15090 cut-off events. For 257197/257197 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 122199 event pairs, 1934 based on Foata normal form. 32/15122 useless extension candidates. Maximal degree in co-relation 92295. Up to 7589 conditions per place. [2023-09-01 14:37:04,755 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 507 selfloop transitions, 405 changer transitions 146/1058 dead transitions. [2023-09-01 14:37:04,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1058 transitions, 17170 flow [2023-09-01 14:37:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-09-01 14:37:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-09-01 14:37:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4047 transitions. [2023-09-01 14:37:04,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106128246753247 [2023-09-01 14:37:04,761 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4047 transitions. [2023-09-01 14:37:04,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4047 transitions. [2023-09-01 14:37:04,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:04,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4047 transitions. [2023-09-01 14:37:04,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 91.97727272727273) internal successors, (4047), 44 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:04,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 224.0) internal successors, (10080), 45 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:04,780 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 224.0) internal successors, (10080), 45 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:04,780 INFO L175 Difference]: Start difference. First operand has 292 places, 721 transitions, 12260 flow. Second operand 44 states and 4047 transitions. [2023-09-01 14:37:04,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1058 transitions, 17170 flow [2023-09-01 14:37:05,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1058 transitions, 16335 flow, removed 342 selfloop flow, removed 18 redundant places. [2023-09-01 14:37:06,006 INFO L231 Difference]: Finished difference. Result has 327 places, 787 transitions, 14021 flow [2023-09-01 14:37:06,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=11567, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14021, PETRI_PLACES=327, PETRI_TRANSITIONS=787} [2023-09-01 14:37:06,007 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 308 predicate places. [2023-09-01 14:37:06,007 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 787 transitions, 14021 flow [2023-09-01 14:37:06,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.77272727272727) internal successors, (1887), 22 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:06,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:06,008 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:06,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:06,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:06,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:06,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:06,213 INFO L85 PathProgramCache]: Analyzing trace with hash 26327022, now seen corresponding path program 15 times [2023-09-01 14:37:06,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:06,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559660324] [2023-09-01 14:37:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:06,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:37:06,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:06,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559660324] [2023-09-01 14:37:06,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559660324] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074364728] [2023-09-01 14:37:06,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:37:06,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:06,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:06,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:06,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:37:06,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:37:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 14:37:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:37:06,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:37:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074364728] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:06,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:06,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 14 [2023-09-01 14:37:06,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734372678] [2023-09-01 14:37:06,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:06,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:37:06,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:37:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:37:06,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 224 [2023-09-01 14:37:06,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 787 transitions, 14021 flow. Second operand has 15 states, 15 states have (on average 99.13333333333334) internal successors, (1487), 15 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:06,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:06,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 224 [2023-09-01 14:37:06,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:14,312 INFO L130 PetriNetUnfolder]: 14446/27367 cut-off events. [2023-09-01 14:37:14,312 INFO L131 PetriNetUnfolder]: For 588197/588197 co-relation queries the response was YES. [2023-09-01 14:37:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168498 conditions, 27367 events. 14446/27367 cut-off events. For 588197/588197 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 244969 event pairs, 3302 based on Foata normal form. 276/27643 useless extension candidates. Maximal degree in co-relation 168400. Up to 13738 conditions per place. [2023-09-01 14:37:14,916 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 532 selfloop transitions, 806 changer transitions 21/1359 dead transitions. [2023-09-01 14:37:14,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1359 transitions, 26124 flow [2023-09-01 14:37:14,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:37:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:37:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-09-01 14:37:14,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4724702380952381 [2023-09-01 14:37:14,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-09-01 14:37:14,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-09-01 14:37:14,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:14,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-09-01 14:37:14,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:14,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:14,919 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:14,919 INFO L175 Difference]: Start difference. First operand has 327 places, 787 transitions, 14021 flow. Second operand 6 states and 635 transitions. [2023-09-01 14:37:14,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1359 transitions, 26124 flow [2023-09-01 14:37:17,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1359 transitions, 25891 flow, removed 67 selfloop flow, removed 11 redundant places. [2023-09-01 14:37:17,385 INFO L231 Difference]: Finished difference. Result has 325 places, 1303 transitions, 26177 flow [2023-09-01 14:37:17,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=13836, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=26177, PETRI_PLACES=325, PETRI_TRANSITIONS=1303} [2023-09-01 14:37:17,386 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 306 predicate places. [2023-09-01 14:37:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1303 transitions, 26177 flow [2023-09-01 14:37:17,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 99.13333333333334) internal successors, (1487), 15 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:17,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:17,386 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:17,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:17,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:37:17,587 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:17,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1019268918, now seen corresponding path program 16 times [2023-09-01 14:37:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001922727] [2023-09-01 14:37:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:18,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001922727] [2023-09-01 14:37:18,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001922727] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445225718] [2023-09-01 14:37:18,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:37:18,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:18,363 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:18,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:37:18,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:37:18,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:18,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 14:37:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:18,975 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:37:18,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:37:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:18,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:19,032 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:37:19,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:37:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445225718] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:19,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-09-01 14:37:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157196216] [2023-09-01 14:37:19,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:19,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:37:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:37:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 14:37:20,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:37:20,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1303 transitions, 26177 flow. Second operand has 42 states, 42 states have (on average 83.42857142857143) internal successors, (3504), 42 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:20,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:20,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:37:20,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:32,293 INFO L130 PetriNetUnfolder]: 10917/20944 cut-off events. [2023-09-01 14:37:32,294 INFO L131 PetriNetUnfolder]: For 428321/428321 co-relation queries the response was YES. [2023-09-01 14:37:32,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134694 conditions, 20944 events. 10917/20944 cut-off events. For 428321/428321 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 182180 event pairs, 748 based on Foata normal form. 660/21604 useless extension candidates. Maximal degree in co-relation 134594. Up to 10788 conditions per place. [2023-09-01 14:37:32,685 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 415 selfloop transitions, 878 changer transitions 154/1447 dead transitions. [2023-09-01 14:37:32,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1447 transitions, 29070 flow [2023-09-01 14:37:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-09-01 14:37:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-09-01 14:37:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6412 transitions. [2023-09-01 14:37:32,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40316901408450706 [2023-09-01 14:37:32,696 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6412 transitions. [2023-09-01 14:37:32,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6412 transitions. [2023-09-01 14:37:32,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:32,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6412 transitions. [2023-09-01 14:37:32,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 90.30985915492958) internal successors, (6412), 71 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:32,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 224.0) internal successors, (16128), 72 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:32,719 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 224.0) internal successors, (16128), 72 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:32,720 INFO L175 Difference]: Start difference. First operand has 325 places, 1303 transitions, 26177 flow. Second operand 71 states and 6412 transitions. [2023-09-01 14:37:32,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1447 transitions, 29070 flow [2023-09-01 14:37:34,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1447 transitions, 28190 flow, removed 431 selfloop flow, removed 6 redundant places. [2023-09-01 14:37:34,524 INFO L231 Difference]: Finished difference. Result has 401 places, 994 transitions, 23346 flow [2023-09-01 14:37:34,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=16377, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=23346, PETRI_PLACES=401, PETRI_TRANSITIONS=994} [2023-09-01 14:37:34,525 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 382 predicate places. [2023-09-01 14:37:34,525 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 994 transitions, 23346 flow [2023-09-01 14:37:34,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 83.42857142857143) internal successors, (3504), 42 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:34,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:34,526 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:34,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:34,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:34,726 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:34,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1260842560, now seen corresponding path program 17 times [2023-09-01 14:37:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054670525] [2023-09-01 14:37:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054670525] [2023-09-01 14:37:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054670525] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70957701] [2023-09-01 14:37:35,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:37:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:35,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:35,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:37:35,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:37:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2023-09-01 14:37:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:35,883 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:37:35,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:37:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:35,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:36,145 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:37:36,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:37:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70957701] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:36,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:36,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-09-01 14:37:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428838563] [2023-09-01 14:37:36,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-09-01 14:37:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-09-01 14:37:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2023-09-01 14:37:37,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:37:37,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 994 transitions, 23346 flow. Second operand has 41 states, 41 states have (on average 83.51219512195122) internal successors, (3424), 41 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:37,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:37,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:37:37,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:38:00,788 INFO L130 PetriNetUnfolder]: 17676/34255 cut-off events. [2023-09-01 14:38:00,788 INFO L131 PetriNetUnfolder]: For 590150/590150 co-relation queries the response was YES. [2023-09-01 14:38:01,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232383 conditions, 34255 events. 17676/34255 cut-off events. For 590150/590150 co-relation queries the response was YES. Maximal size of possible extension queue 1782. Compared 335519 event pairs, 4774 based on Foata normal form. 199/34454 useless extension candidates. Maximal degree in co-relation 232255. Up to 17889 conditions per place. [2023-09-01 14:38:01,611 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 428 selfloop transitions, 56 changer transitions 1985/2469 dead transitions. [2023-09-01 14:38:01,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2469 transitions, 51253 flow [2023-09-01 14:38:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-09-01 14:38:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-09-01 14:38:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 11126 transitions. [2023-09-01 14:38:01,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40056163594470046 [2023-09-01 14:38:01,619 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 11126 transitions. [2023-09-01 14:38:01,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 11126 transitions. [2023-09-01 14:38:01,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:38:01,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 11126 transitions. [2023-09-01 14:38:01,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 89.7258064516129) internal successors, (11126), 124 states have internal predecessors, (11126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:01,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 224.0) internal successors, (28000), 125 states have internal predecessors, (28000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:01,660 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 224.0) internal successors, (28000), 125 states have internal predecessors, (28000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:01,661 INFO L175 Difference]: Start difference. First operand has 401 places, 994 transitions, 23346 flow. Second operand 124 states and 11126 transitions. [2023-09-01 14:38:01,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2469 transitions, 51253 flow [2023-09-01 14:38:08,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 2469 transitions, 48374 flow, removed 675 selfloop flow, removed 22 redundant places. [2023-09-01 14:38:08,413 INFO L231 Difference]: Finished difference. Result has 516 places, 442 transitions, 10465 flow [2023-09-01 14:38:08,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=21509, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=10465, PETRI_PLACES=516, PETRI_TRANSITIONS=442} [2023-09-01 14:38:08,414 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 497 predicate places. [2023-09-01 14:38:08,414 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 442 transitions, 10465 flow [2023-09-01 14:38:08,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 83.51219512195122) internal successors, (3424), 41 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:08,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:38:08,414 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:38:08,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 14:38:08,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:08,615 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:38:08,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:38:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash -276467372, now seen corresponding path program 18 times [2023-09-01 14:38:08,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:38:08,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130108400] [2023-09-01 14:38:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:38:08,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:38:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:09,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:38:09,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130108400] [2023-09-01 14:38:09,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130108400] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:38:09,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727212888] [2023-09-01 14:38:09,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:38:09,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:38:09,237 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:38:09,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:38:09,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:38:09,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:38:09,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 14:38:09,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:38:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:38:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:38:09,973 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:38:09,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:38:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:09,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:10,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:10,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:38:10,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:38:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:10,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727212888] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:38:10,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:38:10,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-09-01 14:38:10,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152017228] [2023-09-01 14:38:10,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:38:10,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 14:38:10,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:38:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 14:38:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1750, Unknown=4, NotChecked=0, Total=1980 [2023-09-01 14:38:11,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-09-01 14:38:11,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 442 transitions, 10465 flow. Second operand has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:11,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:38:11,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-09-01 14:38:11,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:38:14,538 INFO L130 PetriNetUnfolder]: 4912/9175 cut-off events. [2023-09-01 14:38:14,538 INFO L131 PetriNetUnfolder]: For 161155/161155 co-relation queries the response was YES. [2023-09-01 14:38:14,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63188 conditions, 9175 events. 4912/9175 cut-off events. For 161155/161155 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 72546 event pairs, 1731 based on Foata normal form. 1/9176 useless extension candidates. Maximal degree in co-relation 63052. Up to 7781 conditions per place. [2023-09-01 14:38:14,624 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 436 selfloop transitions, 57 changer transitions 44/537 dead transitions. [2023-09-01 14:38:14,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 537 transitions, 12240 flow [2023-09-01 14:38:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:38:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:38:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1608 transitions. [2023-09-01 14:38:14,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262987012987013 [2023-09-01 14:38:14,626 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1608 transitions. [2023-09-01 14:38:14,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1608 transitions. [2023-09-01 14:38:14,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:38:14,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1608 transitions. [2023-09-01 14:38:14,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.0909090909091) internal successors, (1608), 22 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:14,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:14,631 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:14,631 INFO L175 Difference]: Start difference. First operand has 516 places, 442 transitions, 10465 flow. Second operand 22 states and 1608 transitions. [2023-09-01 14:38:14,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 537 transitions, 12240 flow [2023-09-01 14:38:15,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 537 transitions, 10642 flow, removed 150 selfloop flow, removed 91 redundant places. [2023-09-01 14:38:15,478 INFO L231 Difference]: Finished difference. Result has 226 places, 444 transitions, 9118 flow [2023-09-01 14:38:15,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=8962, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9118, PETRI_PLACES=226, PETRI_TRANSITIONS=444} [2023-09-01 14:38:15,479 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 207 predicate places. [2023-09-01 14:38:15,479 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 444 transitions, 9118 flow [2023-09-01 14:38:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:15,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:38:15,479 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:38:15,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 14:38:15,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:15,680 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:38:15,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:38:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash -834390106, now seen corresponding path program 19 times [2023-09-01 14:38:15,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:38:15,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669991658] [2023-09-01 14:38:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:38:15,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:38:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:16,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:38:16,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669991658] [2023-09-01 14:38:16,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669991658] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:38:16,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248596956] [2023-09-01 14:38:16,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:38:16,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:16,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:38:16,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:38:16,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:38:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 14:38:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:38:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:16,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:17,053 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:38:17,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:38:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:17,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248596956] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:38:17,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:38:17,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-09-01 14:38:17,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630930638] [2023-09-01 14:38:17,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:38:17,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-09-01 14:38:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:38:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-09-01 14:38:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2023-09-01 14:38:18,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:38:18,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 444 transitions, 9118 flow. Second operand has 42 states, 42 states have (on average 83.57142857142857) internal successors, (3510), 42 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:18,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:38:18,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:38:18,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:38:23,424 INFO L130 PetriNetUnfolder]: 6282/11674 cut-off events. [2023-09-01 14:38:23,424 INFO L131 PetriNetUnfolder]: For 136523/136523 co-relation queries the response was YES. [2023-09-01 14:38:23,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71738 conditions, 11674 events. 6282/11674 cut-off events. For 136523/136523 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 94951 event pairs, 458 based on Foata normal form. 20/11694 useless extension candidates. Maximal degree in co-relation 71666. Up to 5817 conditions per place. [2023-09-01 14:38:23,499 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 325 selfloop transitions, 453 changer transitions 121/899 dead transitions. [2023-09-01 14:38:23,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 899 transitions, 15654 flow [2023-09-01 14:38:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-09-01 14:38:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-09-01 14:38:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5122 transitions. [2023-09-01 14:38:23,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40115914786967416 [2023-09-01 14:38:23,504 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5122 transitions. [2023-09-01 14:38:23,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5122 transitions. [2023-09-01 14:38:23,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:38:23,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5122 transitions. [2023-09-01 14:38:23,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 89.85964912280701) internal successors, (5122), 57 states have internal predecessors, (5122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:23,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 224.0) internal successors, (12992), 58 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:23,520 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 224.0) internal successors, (12992), 58 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:23,520 INFO L175 Difference]: Start difference. First operand has 226 places, 444 transitions, 9118 flow. Second operand 57 states and 5122 transitions. [2023-09-01 14:38:23,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 899 transitions, 15654 flow [2023-09-01 14:38:23,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 899 transitions, 15521 flow, removed 13 selfloop flow, removed 18 redundant places. [2023-09-01 14:38:23,973 INFO L231 Difference]: Finished difference. Result has 283 places, 558 transitions, 11790 flow [2023-09-01 14:38:23,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=11790, PETRI_PLACES=283, PETRI_TRANSITIONS=558} [2023-09-01 14:38:23,973 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 264 predicate places. [2023-09-01 14:38:23,973 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 558 transitions, 11790 flow [2023-09-01 14:38:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 83.57142857142857) internal successors, (3510), 42 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:23,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:38:23,974 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:38:23,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 14:38:24,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:24,175 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:38:24,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:38:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1735981622, now seen corresponding path program 20 times [2023-09-01 14:38:24,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:38:24,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241235955] [2023-09-01 14:38:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:38:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:38:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:24,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:38:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241235955] [2023-09-01 14:38:24,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241235955] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:38:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47209644] [2023-09-01 14:38:24,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:38:24,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:38:24,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:38:24,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:38:24,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:38:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:38:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 14:38:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:38:25,354 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:38:25,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:38:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:25,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:25,458 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:38:25,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:38:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:25,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47209644] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:38:25,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:38:25,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-09-01 14:38:25,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535636868] [2023-09-01 14:38:25,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:38:25,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-09-01 14:38:25,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:38:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-09-01 14:38:25,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2023-09-01 14:38:26,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:38:26,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 558 transitions, 11790 flow. Second operand has 43 states, 43 states have (on average 83.53488372093024) internal successors, (3592), 43 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:26,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:38:26,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:38:26,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:38:30,302 INFO L130 PetriNetUnfolder]: 6236/11575 cut-off events. [2023-09-01 14:38:30,302 INFO L131 PetriNetUnfolder]: For 149948/149948 co-relation queries the response was YES. [2023-09-01 14:38:30,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74993 conditions, 11575 events. 6236/11575 cut-off events. For 149948/149948 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 94578 event pairs, 2281 based on Foata normal form. 1/11576 useless extension candidates. Maximal degree in co-relation 74902. Up to 10281 conditions per place. [2023-09-01 14:38:30,394 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 529 selfloop transitions, 46 changer transitions 78/653 dead transitions. [2023-09-01 14:38:30,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 653 transitions, 13726 flow [2023-09-01 14:38:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:38:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:38:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1935 transitions. [2023-09-01 14:38:30,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926542207792208 [2023-09-01 14:38:30,397 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1935 transitions. [2023-09-01 14:38:30,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1935 transitions. [2023-09-01 14:38:30,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:38:30,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1935 transitions. [2023-09-01 14:38:30,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.95454545454545) internal successors, (1935), 22 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:30,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:30,402 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:30,402 INFO L175 Difference]: Start difference. First operand has 283 places, 558 transitions, 11790 flow. Second operand 22 states and 1935 transitions. [2023-09-01 14:38:30,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 653 transitions, 13726 flow [2023-09-01 14:38:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 653 transitions, 13385 flow, removed 152 selfloop flow, removed 19 redundant places. [2023-09-01 14:38:31,113 INFO L231 Difference]: Finished difference. Result has 280 places, 552 transitions, 11442 flow [2023-09-01 14:38:31,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=11451, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11442, PETRI_PLACES=280, PETRI_TRANSITIONS=552} [2023-09-01 14:38:31,114 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 261 predicate places. [2023-09-01 14:38:31,114 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 552 transitions, 11442 flow [2023-09-01 14:38:31,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 83.53488372093024) internal successors, (3592), 43 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:31,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:38:31,114 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:38:31,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-09-01 14:38:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 14:38:31,315 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:38:31,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:38:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash -327454221, now seen corresponding path program 21 times [2023-09-01 14:38:31,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:38:31,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592604896] [2023-09-01 14:38:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:38:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:38:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:38:32,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592604896] [2023-09-01 14:38:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592604896] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:38:32,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258461617] [2023-09-01 14:38:32,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:38:32,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:32,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:38:32,471 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:38:32,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:38:32,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:38:32,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:38:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-09-01 14:38:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:38:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 14:38:33,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:33,027 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:38:33,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:38:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 14:38:33,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258461617] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:38:33,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:38:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 23 [2023-09-01 14:38:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427750695] [2023-09-01 14:38:33,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:38:33,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:38:33,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:38:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:38:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2023-09-01 14:38:33,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-09-01 14:38:33,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 552 transitions, 11442 flow. Second operand has 25 states, 25 states have (on average 85.72) internal successors, (2143), 25 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:33,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:38:33,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-09-01 14:38:33,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:38:39,571 INFO L130 PetriNetUnfolder]: 9637/17738 cut-off events. [2023-09-01 14:38:39,571 INFO L131 PetriNetUnfolder]: For 276720/276720 co-relation queries the response was YES. [2023-09-01 14:38:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112171 conditions, 17738 events. 9637/17738 cut-off events. For 276720/276720 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 151703 event pairs, 753 based on Foata normal form. 44/17782 useless extension candidates. Maximal degree in co-relation 112080. Up to 8754 conditions per place. [2023-09-01 14:38:39,727 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 330 selfloop transitions, 838 changer transitions 197/1365 dead transitions. [2023-09-01 14:38:39,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1365 transitions, 24046 flow [2023-09-01 14:38:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-09-01 14:38:39,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-09-01 14:38:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6734 transitions. [2023-09-01 14:38:39,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118150684931507 [2023-09-01 14:38:39,732 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6734 transitions. [2023-09-01 14:38:39,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6734 transitions. [2023-09-01 14:38:39,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:38:39,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6734 transitions. [2023-09-01 14:38:39,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 92.24657534246575) internal successors, (6734), 73 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:39,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 224.0) internal successors, (16576), 74 states have internal predecessors, (16576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:39,751 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 224.0) internal successors, (16576), 74 states have internal predecessors, (16576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:39,751 INFO L175 Difference]: Start difference. First operand has 280 places, 552 transitions, 11442 flow. Second operand 73 states and 6734 transitions. [2023-09-01 14:38:39,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1365 transitions, 24046 flow [2023-09-01 14:38:40,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1365 transitions, 23901 flow, removed 10 selfloop flow, removed 16 redundant places. [2023-09-01 14:38:40,780 INFO L231 Difference]: Finished difference. Result has 339 places, 875 transitions, 20230 flow [2023-09-01 14:38:40,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=11345, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=20230, PETRI_PLACES=339, PETRI_TRANSITIONS=875} [2023-09-01 14:38:40,781 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 320 predicate places. [2023-09-01 14:38:40,781 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 875 transitions, 20230 flow [2023-09-01 14:38:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.72) internal successors, (2143), 25 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:40,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:38:40,781 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:38:40,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 14:38:40,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 14:38:40,982 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:38:40,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:38:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash 18995713, now seen corresponding path program 22 times [2023-09-01 14:38:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:38:40,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328748291] [2023-09-01 14:38:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:38:40,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:38:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:38:41,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:38:41,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328748291] [2023-09-01 14:38:41,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328748291] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:38:41,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013665871] [2023-09-01 14:38:41,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:38:41,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:41,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:38:41,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:38:41,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 14:38:41,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:38:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:38:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:38:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:38:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:38:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:38:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013665871] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:38:41,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:38:41,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 29 [2023-09-01 14:38:41,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758926184] [2023-09-01 14:38:41,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:38:41,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 14:38:41,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:38:41,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 14:38:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2023-09-01 14:38:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 224 [2023-09-01 14:38:41,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 875 transitions, 20230 flow. Second operand has 30 states, 30 states have (on average 92.06666666666666) internal successors, (2762), 30 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:41,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:38:41,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 224 [2023-09-01 14:38:41,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:38:49,803 INFO L130 PetriNetUnfolder]: 15303/28045 cut-off events. [2023-09-01 14:38:49,804 INFO L131 PetriNetUnfolder]: For 479929/479929 co-relation queries the response was YES. [2023-09-01 14:38:50,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186399 conditions, 28045 events. 15303/28045 cut-off events. For 479929/479929 co-relation queries the response was YES. Maximal size of possible extension queue 1611. Compared 255922 event pairs, 1862 based on Foata normal form. 18/28063 useless extension candidates. Maximal degree in co-relation 186293. Up to 13744 conditions per place. [2023-09-01 14:38:50,219 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 304 selfloop transitions, 970 changer transitions 65/1339 dead transitions. [2023-09-01 14:38:50,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1339 transitions, 32754 flow [2023-09-01 14:38:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 14:38:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 14:38:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2030 transitions. [2023-09-01 14:38:50,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2023-09-01 14:38:50,221 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2030 transitions. [2023-09-01 14:38:50,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2030 transitions. [2023-09-01 14:38:50,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:38:50,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2030 transitions. [2023-09-01 14:38:50,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.66666666666667) internal successors, (2030), 21 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:50,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:50,225 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:50,225 INFO L175 Difference]: Start difference. First operand has 339 places, 875 transitions, 20230 flow. Second operand 21 states and 2030 transitions. [2023-09-01 14:38:50,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1339 transitions, 32754 flow [2023-09-01 14:38:53,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1339 transitions, 31432 flow, removed 630 selfloop flow, removed 11 redundant places. [2023-09-01 14:38:53,530 INFO L231 Difference]: Finished difference. Result has 348 places, 1231 transitions, 29966 flow [2023-09-01 14:38:53,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=19588, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=29966, PETRI_PLACES=348, PETRI_TRANSITIONS=1231} [2023-09-01 14:38:53,531 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 329 predicate places. [2023-09-01 14:38:53,531 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1231 transitions, 29966 flow [2023-09-01 14:38:53,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 92.06666666666666) internal successors, (2762), 30 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:53,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:38:53,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:38:53,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 14:38:53,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:53,741 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:38:53,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:38:53,741 INFO L85 PathProgramCache]: Analyzing trace with hash -493421391, now seen corresponding path program 23 times [2023-09-01 14:38:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:38:53,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463540936] [2023-09-01 14:38:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:38:53,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:38:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:38:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:38:54,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:38:54,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463540936] [2023-09-01 14:38:54,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463540936] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:38:54,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580956242] [2023-09-01 14:38:54,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:38:54,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:38:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:38:54,509 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:38:54,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 14:38:54,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:38:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:38:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 14:38:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:38:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:38:54,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:38:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:38:55,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:55,073 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_943 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_943) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)) 5)) is different from false [2023-09-01 14:38:55,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:55,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:38:55,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:38:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-09-01 14:38:55,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580956242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:38:55,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:38:55,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 36 [2023-09-01 14:38:55,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674983137] [2023-09-01 14:38:55,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:38:55,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:38:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:38:55,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:38:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1220, Unknown=1, NotChecked=70, Total=1406 [2023-09-01 14:38:55,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-09-01 14:38:55,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1231 transitions, 29966 flow. Second operand has 38 states, 38 states have (on average 68.36842105263158) internal successors, (2598), 38 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:38:55,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:38:55,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-09-01 14:38:55,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:39:21,815 INFO L130 PetriNetUnfolder]: 30185/54707 cut-off events. [2023-09-01 14:39:21,815 INFO L131 PetriNetUnfolder]: For 1028109/1028109 co-relation queries the response was YES. [2023-09-01 14:39:22,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365318 conditions, 54707 events. 30185/54707 cut-off events. For 1028109/1028109 co-relation queries the response was YES. Maximal size of possible extension queue 2882. Compared 533276 event pairs, 1649 based on Foata normal form. 111/54818 useless extension candidates. Maximal degree in co-relation 365210. Up to 26672 conditions per place. [2023-09-01 14:39:22,724 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 850 selfloop transitions, 2464 changer transitions 195/3509 dead transitions. [2023-09-01 14:39:22,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 3509 transitions, 77304 flow [2023-09-01 14:39:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2023-09-01 14:39:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2023-09-01 14:39:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 11051 transitions. [2023-09-01 14:39:22,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33790973581213307 [2023-09-01 14:39:22,737 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 11051 transitions. [2023-09-01 14:39:22,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 11051 transitions. [2023-09-01 14:39:22,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:39:22,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 11051 transitions. [2023-09-01 14:39:22,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 75.6917808219178) internal successors, (11051), 146 states have internal predecessors, (11051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:39:22,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 224.0) internal successors, (32928), 147 states have internal predecessors, (32928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:39:22,774 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 224.0) internal successors, (32928), 147 states have internal predecessors, (32928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:39:22,774 INFO L175 Difference]: Start difference. First operand has 348 places, 1231 transitions, 29966 flow. Second operand 146 states and 11051 transitions. [2023-09-01 14:39:22,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 3509 transitions, 77304 flow [2023-09-01 14:39:31,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 3509 transitions, 70588 flow, removed 3275 selfloop flow, removed 16 redundant places. [2023-09-01 14:39:31,693 INFO L231 Difference]: Finished difference. Result has 527 places, 2587 transitions, 61733 flow [2023-09-01 14:39:31,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28071, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=61733, PETRI_PLACES=527, PETRI_TRANSITIONS=2587} [2023-09-01 14:39:31,695 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 508 predicate places. [2023-09-01 14:39:31,695 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 2587 transitions, 61733 flow [2023-09-01 14:39:31,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 68.36842105263158) internal successors, (2598), 38 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:39:31,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:39:31,696 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:39:31,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 14:39:31,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:39:31,901 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:39:31,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:39:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2086186457, now seen corresponding path program 24 times [2023-09-01 14:39:31,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:39:31,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230843222] [2023-09-01 14:39:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:39:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:39:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:39:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:39:32,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:39:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230843222] [2023-09-01 14:39:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230843222] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:39:32,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390701969] [2023-09-01 14:39:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:39:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:39:32,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:39:32,509 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:39:32,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 14:39:32,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:39:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:39:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-09-01 14:39:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:39:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:39:33,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:39:33,555 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:39:33,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:39:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:39:34,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390701969] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:39:34,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:39:34,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-09-01 14:39:34,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834476024] [2023-09-01 14:39:34,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:39:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-09-01 14:39:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:39:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-09-01 14:39:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-09-01 14:39:35,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:39:35,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 2587 transitions, 61733 flow. Second operand has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:39:35,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:39:35,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:39:35,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:41:22,513 INFO L130 PetriNetUnfolder]: 71070/129873 cut-off events. [2023-09-01 14:41:22,513 INFO L131 PetriNetUnfolder]: For 6420949/6420949 co-relation queries the response was YES. [2023-09-01 14:41:27,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 964721 conditions, 129873 events. 71070/129873 cut-off events. For 6420949/6420949 co-relation queries the response was YES. Maximal size of possible extension queue 5863. Compared 1398308 event pairs, 3248 based on Foata normal form. 281/130154 useless extension candidates. Maximal degree in co-relation 964551. Up to 62948 conditions per place. [2023-09-01 14:41:27,819 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 2415 selfloop transitions, 6682 changer transitions 585/9682 dead transitions. [2023-09-01 14:41:27,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 874 places, 9682 transitions, 211378 flow [2023-09-01 14:41:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2023-09-01 14:41:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2023-09-01 14:41:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 31468 transitions. [2023-09-01 14:41:27,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036843185550082 [2023-09-01 14:41:27,846 INFO L72 ComplementDD]: Start complementDD. Operand 348 states and 31468 transitions. [2023-09-01 14:41:27,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 348 states and 31468 transitions. [2023-09-01 14:41:27,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:41:27,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 348 states and 31468 transitions. [2023-09-01 14:41:27,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 349 states, 348 states have (on average 90.42528735632185) internal successors, (31468), 348 states have internal predecessors, (31468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:27,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 349 states, 349 states have (on average 224.0) internal successors, (78176), 349 states have internal predecessors, (78176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:27,944 INFO L81 ComplementDD]: Finished complementDD. Result has 349 states, 349 states have (on average 224.0) internal successors, (78176), 349 states have internal predecessors, (78176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:27,944 INFO L175 Difference]: Start difference. First operand has 527 places, 2587 transitions, 61733 flow. Second operand 348 states and 31468 transitions. [2023-09-01 14:41:27,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 874 places, 9682 transitions, 211378 flow [2023-09-01 14:42:18,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 866 places, 9682 transitions, 178082 flow, removed 16574 selfloop flow, removed 8 redundant places. [2023-09-01 14:42:18,275 INFO L231 Difference]: Finished difference. Result has 951 places, 7033 transitions, 140070 flow [2023-09-01 14:42:18,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=56225, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=348, PETRI_FLOW=140070, PETRI_PLACES=951, PETRI_TRANSITIONS=7033} [2023-09-01 14:42:18,278 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 932 predicate places. [2023-09-01 14:42:18,278 INFO L495 AbstractCegarLoop]: Abstraction has has 951 places, 7033 transitions, 140070 flow [2023-09-01 14:42:18,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:18,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:42:18,279 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:42:18,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 14:42:18,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 14:42:18,481 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:42:18,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:42:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1051818535, now seen corresponding path program 25 times [2023-09-01 14:42:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:42:18,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199250780] [2023-09-01 14:42:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:42:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:42:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:42:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:19,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:42:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199250780] [2023-09-01 14:42:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199250780] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:42:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390546468] [2023-09-01 14:42:19,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:42:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:42:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:42:19,197 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:42:19,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 14:42:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:42:19,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 14:42:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:42:19,822 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:42:19,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:42:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:19,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:42:19,884 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:42:19,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-09-01 14:42:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390546468] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:42:20,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:42:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-09-01 14:42:20,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478014603] [2023-09-01 14:42:20,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:42:20,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-09-01 14:42:20,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:42:20,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-09-01 14:42:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2023-09-01 14:42:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:42:21,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 951 places, 7033 transitions, 140070 flow. Second operand has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:21,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:42:21,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:42:21,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:44:00,702 INFO L130 PetriNetUnfolder]: 26145/49460 cut-off events. [2023-09-01 14:44:00,703 INFO L131 PetriNetUnfolder]: For 1627470/1627470 co-relation queries the response was YES. [2023-09-01 14:44:03,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385932 conditions, 49460 events. 26145/49460 cut-off events. For 1627470/1627470 co-relation queries the response was YES. Maximal size of possible extension queue 2940. Compared 506669 event pairs, 2448 based on Foata normal form. 1405/50865 useless extension candidates. Maximal degree in co-relation 385676. Up to 24997 conditions per place. [2023-09-01 14:44:03,729 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 833 selfloop transitions, 2143 changer transitions 279/3255 dead transitions. [2023-09-01 14:44:03,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 3255 transitions, 86475 flow [2023-09-01 14:44:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-09-01 14:44:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-09-01 14:44:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7830 transitions. [2023-09-01 14:44:03,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2023-09-01 14:44:03,737 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7830 transitions. [2023-09-01 14:44:03,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7830 transitions. [2023-09-01 14:44:03,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:44:03,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7830 transitions. [2023-09-01 14:44:03,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 90.0) internal successors, (7830), 87 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:44:03,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 224.0) internal successors, (19712), 88 states have internal predecessors, (19712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:44:03,758 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 224.0) internal successors, (19712), 88 states have internal predecessors, (19712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:44:03,758 INFO L175 Difference]: Start difference. First operand has 951 places, 7033 transitions, 140070 flow. Second operand 87 states and 7830 transitions. [2023-09-01 14:44:03,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 3255 transitions, 86475 flow [2023-09-01 14:44:25,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 3255 transitions, 81510 flow, removed 2399 selfloop flow, removed 127 redundant places. [2023-09-01 14:44:25,686 INFO L231 Difference]: Finished difference. Result has 591 places, 2666 transitions, 74049 flow [2023-09-01 14:44:25,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=59715, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=74049, PETRI_PLACES=591, PETRI_TRANSITIONS=2666} [2023-09-01 14:44:25,688 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 572 predicate places. [2023-09-01 14:44:25,688 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 2666 transitions, 74049 flow [2023-09-01 14:44:25,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:44:25,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:44:25,689 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:44:25,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 14:44:25,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 14:44:25,895 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:44:25,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:44:25,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1081015687, now seen corresponding path program 26 times [2023-09-01 14:44:25,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:44:25,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203343908] [2023-09-01 14:44:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:44:25,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:44:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:44:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:44:26,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:44:26,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203343908] [2023-09-01 14:44:26,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203343908] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:44:26,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470205120] [2023-09-01 14:44:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:44:26,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:44:26,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:44:26,558 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:44:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 14:44:26,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:44:26,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:44:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 14:44:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:44:27,206 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:44:27,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:44:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:44:27,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:44:27,282 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:44:27,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:44:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:44:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470205120] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:44:28,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:44:28,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-09-01 14:44:28,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923280717] [2023-09-01 14:44:28,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:44:28,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-09-01 14:44:28,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:44:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-09-01 14:44:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2023-09-01 14:44:28,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 224 [2023-09-01 14:44:28,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 2666 transitions, 74049 flow. Second operand has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:44:28,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:44:28,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 224 [2023-09-01 14:44:28,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:45:08,283 INFO L130 PetriNetUnfolder]: 26471/50191 cut-off events. [2023-09-01 14:45:08,283 INFO L131 PetriNetUnfolder]: For 1111936/1111936 co-relation queries the response was YES. [2023-09-01 14:45:09,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400931 conditions, 50191 events. 26471/50191 cut-off events. For 1111936/1111936 co-relation queries the response was YES. Maximal size of possible extension queue 2974. Compared 517528 event pairs, 6415 based on Foata normal form. 3/50194 useless extension candidates. Maximal degree in co-relation 400763. Up to 25431 conditions per place. [2023-09-01 14:45:09,962 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1623 selfloop transitions, 1346 changer transitions 443/3412 dead transitions. [2023-09-01 14:45:09,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 3412 transitions, 88492 flow [2023-09-01 14:45:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-09-01 14:45:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-09-01 14:45:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9489 transitions. [2023-09-01 14:45:09,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996378032345013 [2023-09-01 14:45:09,969 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9489 transitions. [2023-09-01 14:45:09,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9489 transitions. [2023-09-01 14:45:09,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:45:09,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9489 transitions. [2023-09-01 14:45:09,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 89.51886792452831) internal successors, (9489), 106 states have internal predecessors, (9489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 224.0) internal successors, (23968), 107 states have internal predecessors, (23968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,996 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 224.0) internal successors, (23968), 107 states have internal predecessors, (23968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:09,996 INFO L175 Difference]: Start difference. First operand has 591 places, 2666 transitions, 74049 flow. Second operand 106 states and 9489 transitions. [2023-09-01 14:45:09,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 3412 transitions, 88492 flow [2023-09-01 14:45:29,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 3412 transitions, 87308 flow, removed 370 selfloop flow, removed 20 redundant places. [2023-09-01 14:45:29,898 INFO L231 Difference]: Finished difference. Result has 679 places, 2705 transitions, 76843 flow [2023-09-01 14:45:29,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=72944, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=76843, PETRI_PLACES=679, PETRI_TRANSITIONS=2705} [2023-09-01 14:45:29,902 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 660 predicate places. [2023-09-01 14:45:29,902 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 2705 transitions, 76843 flow [2023-09-01 14:45:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 83.47058823529412) internal successors, (4257), 51 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:29,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:45:29,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:45:29,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 14:45:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 14:45:30,109 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:45:30,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:45:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash -20180601, now seen corresponding path program 27 times [2023-09-01 14:45:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:45:30,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738267363] [2023-09-01 14:45:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:45:30,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:45:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:45:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:45:30,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:45:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738267363] [2023-09-01 14:45:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738267363] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:45:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306538082] [2023-09-01 14:45:30,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:45:30,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:45:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:45:30,669 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:45:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 14:45:30,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-09-01 14:45:30,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:45:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 14:45:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:45:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-09-01 14:45:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:45:31,190 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:45:31,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-09-01 14:45:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-09-01 14:45:31,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306538082] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:45:31,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:45:31,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 26 [2023-09-01 14:45:31,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096955050] [2023-09-01 14:45:31,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:45:31,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:45:31,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:45:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:45:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:45:31,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-09-01 14:45:31,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 2705 transitions, 76843 flow. Second operand has 28 states, 28 states have (on average 85.67857142857143) internal successors, (2399), 28 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:45:31,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:45:31,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-09-01 14:45:31,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:46:08,485 INFO L130 PetriNetUnfolder]: 25973/49246 cut-off events. [2023-09-01 14:46:08,486 INFO L131 PetriNetUnfolder]: For 1153619/1153619 co-relation queries the response was YES. [2023-09-01 14:46:10,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395910 conditions, 49246 events. 25973/49246 cut-off events. For 1153619/1153619 co-relation queries the response was YES. Maximal size of possible extension queue 2932. Compared 505106 event pairs, 1650 based on Foata normal form. 18/49264 useless extension candidates. Maximal degree in co-relation 395738. Up to 24969 conditions per place. [2023-09-01 14:46:10,173 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 400 selfloop transitions, 2262 changer transitions 923/3585 dead transitions. [2023-09-01 14:46:10,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 792 places, 3585 transitions, 91307 flow [2023-09-01 14:46:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-09-01 14:46:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-09-01 14:46:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 11296 transitions. [2023-09-01 14:46:10,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099883855981417 [2023-09-01 14:46:10,183 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 11296 transitions. [2023-09-01 14:46:10,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 11296 transitions. [2023-09-01 14:46:10,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:46:10,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 11296 transitions. [2023-09-01 14:46:10,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 91.83739837398375) internal successors, (11296), 123 states have internal predecessors, (11296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:46:10,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 224.0) internal successors, (27776), 124 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:46:10,206 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 224.0) internal successors, (27776), 124 states have internal predecessors, (27776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:46:10,206 INFO L175 Difference]: Start difference. First operand has 679 places, 2705 transitions, 76843 flow. Second operand 123 states and 11296 transitions. [2023-09-01 14:46:10,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 792 places, 3585 transitions, 91307 flow [2023-09-01 14:46:29,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 3585 transitions, 87207 flow, removed 448 selfloop flow, removed 52 redundant places. [2023-09-01 14:46:29,090 INFO L231 Difference]: Finished difference. Result has 751 places, 2350 transitions, 70013 flow [2023-09-01 14:46:29,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=73064, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=70013, PETRI_PLACES=751, PETRI_TRANSITIONS=2350} [2023-09-01 14:46:29,092 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 732 predicate places. [2023-09-01 14:46:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 2350 transitions, 70013 flow [2023-09-01 14:46:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.67857142857143) internal successors, (2399), 28 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:46:29,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:46:29,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:46:29,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-09-01 14:46:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:46:29,300 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:46:29,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:46:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 882289853, now seen corresponding path program 28 times [2023-09-01 14:46:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:46:29,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918765200] [2023-09-01 14:46:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:46:29,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:46:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:46:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:46:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:46:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918765200] [2023-09-01 14:46:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918765200] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:46:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301398063] [2023-09-01 14:46:29,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:46:29,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:46:29,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:46:29,944 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:46:29,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 14:46:30,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:46:30,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:46:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 46 conjunts are in the unsatisfiable core [2023-09-01 14:46:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:46:30,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:46:30,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:46:30,740 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:46:30,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-09-01 14:46:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:46:30,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:46:30,898 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1174 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1174) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-09-01 14:46:30,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:46:30,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:46:30,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:46:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-09-01 14:46:31,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301398063] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:46:31,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:46:31,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-09-01 14:46:31,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747576404] [2023-09-01 14:46:31,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:46:31,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-09-01 14:46:31,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:46:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-09-01 14:46:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2445, Unknown=1, NotChecked=102, Total=2862 [2023-09-01 14:46:31,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-09-01 14:46:31,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 2350 transitions, 70013 flow. Second operand has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:46:31,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:46:31,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-09-01 14:46:31,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:47:08,132 INFO L130 PetriNetUnfolder]: 23391/44902 cut-off events. [2023-09-01 14:47:08,133 INFO L131 PetriNetUnfolder]: For 1007572/1007572 co-relation queries the response was YES. [2023-09-01 14:47:09,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368504 conditions, 44902 events. 23391/44902 cut-off events. For 1007572/1007572 co-relation queries the response was YES. Maximal size of possible extension queue 2677. Compared 461986 event pairs, 5682 based on Foata normal form. 1/44903 useless extension candidates. Maximal degree in co-relation 368330. Up to 24360 conditions per place. [2023-09-01 14:47:09,553 INFO L137 encePairwiseOnDemand]: 215/224 looper letters, 1420 selfloop transitions, 1211 changer transitions 151/2782 dead transitions. [2023-09-01 14:47:09,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2782 transitions, 82041 flow [2023-09-01 14:47:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-09-01 14:47:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-09-01 14:47:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3913 transitions. [2023-09-01 14:47:09,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3295990566037736 [2023-09-01 14:47:09,556 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3913 transitions. [2023-09-01 14:47:09,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3913 transitions. [2023-09-01 14:47:09,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:47:09,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3913 transitions. [2023-09-01 14:47:09,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 73.83018867924528) internal successors, (3913), 53 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:09,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 224.0) internal successors, (12096), 54 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:09,564 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 224.0) internal successors, (12096), 54 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:09,564 INFO L175 Difference]: Start difference. First operand has 751 places, 2350 transitions, 70013 flow. Second operand 53 states and 3913 transitions. [2023-09-01 14:47:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2782 transitions, 82041 flow [2023-09-01 14:47:25,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2782 transitions, 78252 flow, removed 137 selfloop flow, removed 68 redundant places. [2023-09-01 14:47:25,559 INFO L231 Difference]: Finished difference. Result has 682 places, 2509 transitions, 73701 flow [2023-09-01 14:47:25,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=66422, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=73701, PETRI_PLACES=682, PETRI_TRANSITIONS=2509} [2023-09-01 14:47:25,561 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 663 predicate places. [2023-09-01 14:47:25,561 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 2509 transitions, 73701 flow [2023-09-01 14:47:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:25,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:47:25,562 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:47:25,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 14:47:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:25,763 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:47:25,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:47:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 436178500, now seen corresponding path program 29 times [2023-09-01 14:47:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:47:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639750521] [2023-09-01 14:47:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:47:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:47:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:47:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:47:26,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:47:26,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639750521] [2023-09-01 14:47:26,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639750521] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:47:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12623793] [2023-09-01 14:47:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:47:26,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:47:26,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:47:26,888 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:47:26,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 14:47:27,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 14:47:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:47:27,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 14:47:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:47:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:47:27,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:47:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:47:27,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:47:27,614 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1225 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1225) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-09-01 14:47:27,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:47:27,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-09-01 14:47:27,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-09-01 14:47:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 5 not checked. [2023-09-01 14:47:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12623793] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:47:27,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:47:27,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 43 [2023-09-01 14:47:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969236184] [2023-09-01 14:47:27,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:47:27,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-09-01 14:47:27,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:47:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-09-01 14:47:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1765, Unknown=1, NotChecked=84, Total=1980 [2023-09-01 14:47:27,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-09-01 14:47:27,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 2509 transitions, 73701 flow. Second operand has 45 states, 45 states have (on average 68.42222222222222) internal successors, (3079), 45 states have internal predecessors, (3079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:47:27,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:47:27,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-09-01 14:47:27,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:48:09,002 INFO L130 PetriNetUnfolder]: 31406/59218 cut-off events. [2023-09-01 14:48:09,002 INFO L131 PetriNetUnfolder]: For 1715287/1715287 co-relation queries the response was YES. [2023-09-01 14:48:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577659 conditions, 59218 events. 31406/59218 cut-off events. For 1715287/1715287 co-relation queries the response was YES. Maximal size of possible extension queue 3474. Compared 619084 event pairs, 1900 based on Foata normal form. 1/59219 useless extension candidates. Maximal degree in co-relation 577496. Up to 29921 conditions per place. [2023-09-01 14:48:11,017 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 218 selfloop transitions, 3239 changer transitions 103/3560 dead transitions. [2023-09-01 14:48:11,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 3560 transitions, 106882 flow [2023-09-01 14:48:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 14:48:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 14:48:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2750 transitions. [2023-09-01 14:48:11,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318050193050193 [2023-09-01 14:48:11,019 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2750 transitions. [2023-09-01 14:48:11,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2750 transitions. [2023-09-01 14:48:11,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:48:11,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2750 transitions. [2023-09-01 14:48:11,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 74.32432432432432) internal successors, (2750), 37 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:11,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 224.0) internal successors, (8512), 38 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:11,025 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 224.0) internal successors, (8512), 38 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:48:11,025 INFO L175 Difference]: Start difference. First operand has 682 places, 2509 transitions, 73701 flow. Second operand 37 states and 2750 transitions. [2023-09-01 14:48:11,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 3560 transitions, 106882 flow Killed by 15